HomeMy WebLinkAboutA004 - Council Action Form dated August 24, 2021 ITEM # 17
DATE: 08-24-21
COUNCIL ACTION FORM
SUBJECT: 2021 UNIFORM PLUMBING CODE AND 2021 INTERNATIONAL
MECHANICAL CODE ADOPTION
BACKGROUND:
On August 10, 2021, the City Council set a public hearing for August 24 to consider
adopting the 2021 Uniform Plumbing Code (UPC) and the 2021 International Mechanical
Code (IMC).
The UPC, published by the International Association of Plumbing and Mechanical
Officials (IAPMO), and the IMC, published by the International Code Council (ICC), are
the two model codes of standards for plumbing and mechanical construction and
maintenance in use throughout the United States.
These Codes are typically updated at three-year intervals to reflect the latest
improvements in construction technology. However, the state of Iowa skipped the 2018
adoption cycle. Therefore, the City of Ames is currently regulated by the 2015 version of
the codes. On June 23, 2021, the State adopted the 2021 Uniform Plumbing Code and
the 2021 International Mechanical Code with amendments.
In previous years, local jurisdictions had the option to adopt different codes, so long as
the code was not less restrictive than state law (e.g., the International Plumbing Code,
which is published by a different organization than the UPC, could be amended and
adopted if the City desired).
However, state law now requires adoption of the UPC and IMC. Alternative codes
are not permitted, but local amendments to the UPC and IMC may be adopted so
long as they are not less restrictive than the UPC and IMC. In previous years, the
City adopted the International Fuel Gas Code (IFGC) for fuel gas installations in lieu
of Chapter 12 of the UPC. With this year's requirement to adopt the same codes as
the state, the City must adopt Chapter 12 of the UPC; therefore, the need for the
City to adopt the IFGC has been eliminated.
CODE CHANGES:
The first step in the code adoption process was an in-depth review of the 2021 UPC and
2021 IMC and their state amendments by Inspections staff and the Legal Department.
The state adopted several amendments to the 2021 UPC and IMC. In addition, the City
historically had several local amendments to the Plumbing Code. Staff has reviewed the
local amendments to determine if they are still applicable. Several of the amendments
are no longer needed because they are included in the new State requirements. Staff is
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proposing no new local amendments compared to previous versions of these
codes.
While not a change in a local requirement, one revision that is being proposed is
the movement of the local cross-connection control amendments as they currently
exist from Chapter 5 (Plumbing and other Codes) of the Ames Municipal Code to
Chapter 28 (Utilities) of the Ames Municipal Code, creating a new Section 28.20913.
Cross-connection controls are the requirements that protect the water utility system from
contamination. Staff from the Inspection Division and Water and Pollution Control
Department discussed the cross-connection requirements in the City's local amendments
and agreed they would be better suited outside of Chapter 5 because they have different
enforcement and appeal capabilities.
Attachment A highlights some of the more notable changes between the code editions.
Also attached are the draft versions of the proposed ordinances for Chapter 5 and
Chapter 28.
PUBLIC INPUT:
After a staff review of the codes was completed, the process moved to the Building Board
of Appeals. The Building Board of Appeals is a seven-member board tasked with
reviewing proposed text amendments to Ames Municipal Code, Chapter 5, Building,
Electrical, Mechanical and Plumbing Code. Each member is qualified by experience and
training in matters pertaining to building construction. Proposed text amendments are
reviewed by the Board with a public hearing and recommendation to the City Council.
On July 12, 2021, Inspections staff sent an e-mail to all plumbing and mechanical
contractors who have done business with the Inspection Division within the last year, and
to the Ames Home Builder's Association (AHBA) to notify them of the proposed 2021
UPC and IMC adoption process. They were informed that their attendance and input at
the August 2, 2021 , Building Board of Appeals meeting would be welcome. An additional
email was sent on July 26, 2021 to the same group reminding them of the Board meeting
on August 2, 2021 and providing them with a copy of the proposed code and significant
changes.
The Building Board of Appeals held a public hearing on August 2, 2021. There were no
contractors present for the meeting and no public input submitted. As a result, the
Board made a motion to recommend to the City Council approval of the 2021 UPC and
the 2021 IMC with the State of Iowa amendments and local amendments.
A third email was sent to contractors on August 3, 2021, notifying them of the Board's
decision and Staff's intent to place this matter on the August 10, 2021 City Council
Agenda to request that the required public hearing for adoption of the two codes be set
for August 24, 2021 . A fourth email was sent to contractors on August 16, 2021,
notifying them of the adopted resolution and the August 24, 2021 Public Hearing
date.
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ALTERNATIVES:
1. Adopt the following on first reading:
a. The 2021 Uniform Plumbing Code (UPC) and the 2021 edition of the
International Mechanical Code (IMC) with the same amendments adopted
by the State of Iowa and the existing local amendments; and
b. Insert a new Section 28.209B which adopts the cross-connection control
standards of the 2021 Uniform Plumbing Code along with existing local
amendments that are being relocated from Chapter 5.
2. Direct staff to work with the Building Board of Appeals to develop further local
amendments to the recommended codes.
CITY MANAGER'S RECOMMENDED ACTION:
City staff and the Building Board of Appeals have reviewed the proposed codes and have
recommended approval to the City Council. The State Codes were in effect on June 23,
2021 and all local jurisdictions are required to adopt, at minimum, the same code as the
State Code at that time.
It is therefore the recommendation of the City Manager that the City Council adopt
Alternative No. 1, as described above.
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Attachment A
Significant Changes for the UPC
• New provisions for temperature limiting devices allows conforming water
heaters to be utilized for temperature limiting of the hot water. 407.3(2)
• New provisions for the required guardrails around equipment located on
elevated surfaces. 508.2.11
• New standard introduced for leak detection devices for water supply and
distribution. 606.8-606.9
• New design standard for potable water pumps. 609.8.1-609.8.2
• New design and installation standards for plastic DVVV piping. 701.2
• New design standard for cleanout fittings and caps. 707.2
• New requirements for circuit venting 911.2.1-911.5
Significant Changes for the IMC
• New standard for condensate line termination. 307.1.1, 307.2.1.1, 307.2.3.3
• New, more relaxed, standards for factory combustion/intake and exhaust.
401.4(3)
• New standards for whole-house ventilation. 403.2.1 Exceptions 2-2.2
• New standards for manicure/pedicure operations. 520.20
• New standards for clothes dryer exhausts. 504.4.1, 504.6
• New regulation for grease duct cleanouts 506.3.9(6,7)
• New requirements for polyurethane spray-foam. 602.2.2.1.8, 604.3
• New standards for fire and smoke dampers. 607.4.1-607.4.2
• Updated refrigerant tables. 1101.1.1, 1101.1.2, Table 1101.2
ORDINANCE NO.
AN ORDINANCE TO AMEND THE MUNICIPAL CODE OF THE CITY
OF AMES,IOWA,BY ENACTING A NEW SECTION 28.209B
THEREOF,FOR THE PURPOSE OF ADOPTING THE CROSS-
CONNECTION CONTROL PROVISIONS OF THE 2021 UNIFORM
PLUMBING CODE;REPEALING ANY AND ALL ORDINANCES OR
PARTS OF ORDINANCES IN CONFLICT TO THE EXTENT OF SUCH
CONFLICT; PROVIDING A PENALTY;AND ESTABLISHING AN
EFFECTIVE DATE.
BE IT ENACTED,by the City Council for the City of Ames,Iowa,that:
Section One. The Municipal Code of the City of Ames,Iowa shall be and the same is hereby amended by
enacting a new Section 28.20913 as follows:
"28.209B.Cross-Connection Control. Section 603 of the Uniform Plumbing Code(UPC),2021 Edition,as
published by the International Association of Plumbing and Mechanical Officials,4755 E.Philadelphia Street,
Ontario, California 91761-2816,is hereby adopted by reference with amendments as the Cross-Connection Control
standards.The adopted provisions of the 2021 Uniform Plumbing Code(UPC),are amended as follows:
(1) Section 603.1 General is amended by adding subsections 603.La through 603.Lq as follows:
(a) Purpose.The purpose of these containment regulations is:
(i) to protect the City of Ames Public Water Supply (PWS) from the possibility of
contamination or pollution by containing within the customer's internal distribution
system(s) or the customer's private water system(s) such contaminants or pollutants that
could backflow into the PWS;and
(ii) to provide for the maintenance of a continuing program of containment that will
systematically and effectively prevent the contamination or pollution of the PWS.
(b) Applicability. These containment regulations apply to all City of Ames Water Utility customers
within city limits.
(c) Penalty. A violation of any provision of the Cross-Connection Control standards shall be a
municipal infraction punishable by a penalty of$500 for a first offense, a penalty of$750 for a
second offense, and$1,000 for each succeeding offense.
(d) Definitions.As used in this section:
(i) Approved Backflow Prevention Assembly For Containment: A backflow prevention
assembly which is approved by the University of Southern California - Foundation for
Cross-Connection Control and Hydraulic Research. The backflow prevention assembly
must also be listed by the International Association of Plumbing and Mechanical
Officials, the American Society of Sanitary Engineering, or an equivalent listing. The
approval and listing requirements do not apply to an air gap used as an approved
backflow prevention assembly for containment.
(ii) Auxiliary Water Supply: Any source of water that is available to the customer over which
the City of Ames water utility does not have sanitary control to reduce pollution,
contamination, or other conditions that make that source of water unacceptable as a
potable water supply, such as,but not limited to:
(A) a public or private water supply other than the City of Ames water utility,or
(B) public or private wells,or
(C) lakes, naturally-fed ponds, storm water basins, and flowing waters (rivers,
creeks, etc.)from which water is drawn.
(iii) Available to the Customer: The water utility customer has authority to use, or direct the
use of, the auxiliary water supply by virtue of ownership, contract, or other arrangement
for control.
(iv) Commercial/Industrial Fluid: Any liquid,gas,or solution that is a chemical,biological, or
other substance in a form, quantity, or concentration that would constitute a hazard
(health or non-health) if introduced into the public water supply, such as, but not limited
to:
(A) polluted or contaminated waters; or
(B) all types of process and used waters (waters which originated from the public
water supply but may have deteriorated in sanitary quality);or
(C) chemicals in fluid form; or
(D) plating acids and alkalis;or
(E) circulated cooling waters(except for those solely used for air conditioning);or
(F) oils,gases, caustic and acid solutions;or
(G) other liquid and gaseous fluids used industrially,agriculturally,commercially,or
for other non-domestic purposes.
(v) Commercial/Industrial Fluid System: Any system used by the water utility customer to
store or utilize any commercial/industrial fluid in a manner that may constitute a hazard
(health or non-health)to the public water supply, such as,but not limited to:
(A) car washes; or
(B) microbreweries; or
(C) chlorinators;or
(D) clean-in-place systems; or
(E) bulk fluid storage with remote dispensing(motor oil,antifreeze,etc.);and
(F) injection molding with integral heating and cooling.
However,commercial/industrial fluid systems do not include:
(A) fuel gas(propane or natural gas)systems; or
(B) air conditioning, cooling,refrigeration, and similar systems using only Freon or
similar refrigerants;or
(C) sanitary sewer,rainwater,or storm sewer lines;and
(D) boilers.
(vi) Containment: A method of backflow prevention which requires the installation of a
backflow prevention assembly at the water service connection.
(vii) Hazard, Degree of. The rating of a cross-connection or service connection which
indicates if it has the potential to cause contamination or pollution. The term is derived
from an evaluation of the potential risk to public health and the adverse effect of the
hazard upon the potable water system.
(viii) Hazard - Health: A hazard upon the PWS involving any substance that, if introduced in
the potable water supply, could cause death, illness, spread disease, or have a high
probability of causing such effects.
(ix) Hazard - Non-health: A hazard upon the PWS involving any substance that generally
would not be a health hazard but, if introduced into the PWS, could cause a nuisance by
introducing color, taste or odor, or would alter the quality of the PWS physically,
chemically, or biologically.
(x) Permanent Swimming Pool: A pool or tub with a capacity of 1,000 gallons or more of
chemically treated water that has a filtration system with a pump and rigidly supported
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walls/sides. Above-ground movable pools and tubs that meet the above criteria shall be
deemed"permanent swimming pools."
(xi) Registered Backflow Prevention Assembly Technician (Technician): A person who is
registered by the State of Iowa to test or repair backflow prevention assemblies and report
on the condition of those assemblies.
(xii) Service Connection: The terminal end of the pipe connected to, directly or indirectly, the
City of Ames water main;that is,the point of delivery to the customer's water system. If
a meter is installed at the end of the service connection,then the service connection shall
mean the downstream end of the meter. Service connections shall also include,but not be
limited to, a temporary water service connection from a fire hydrant and all other
temporary or emergency water service connections from the public water system.
(xiii) Thermal Expansion: Volumetric increase of water due to heating resulting in increased
pressure in a closed system.
(e) Administrative Authority.
(i) The Administrative Authority is the Ames City Council acting through such persons or
departments as the City Council shall designate.
(ii) The Administrative Authority shall have the right to enter, with the consent of the
customer or upon the basis of a suitable warrant issued by a court of appropriate
jurisdiction, any property to determine if the conditions for a partial or total exemption
have been satisfied or if a backflow prevention assembly has been properly installed for
containment.
(A) All backflow prevention assemblies shall be available for City inspection within
24 hours.
(B) The entrance to the property to determine if the conditions for a partial or total
exemption have been satisfied will not be necessary if the customer has properly
installed, tested, and maintained an approved RP or air gap on every and all
service connections serving the customer's premises.
(iii) The Administrative Authority may collect fees for the administration of this program.
(iv) The Administrative Authority shall maintain records of containment hazard surveys, and
of the installation, testing, and repair of all backflow prevention assemblies installed for
containment purposes.
(f) Where Containment Is Required.
(i) A reduced-pressure principle backflow prevention assembly (RP) or air gap is required
for containment for every direct or indirect service connection unless such connection:
(a) qualifies for a total or partial exemption;or
(b) supplies a fire protection system.
(ii) A DC may be installed for containment in place of an RP or air gap when a partial
exemption is granted.
(iii) A partial exemption shall be granted only if all of the following conditions precedent are
met:
(A) The entire facilities are within the scope and applicability of the plumbing
regulations of the City of Ames, Iowa; and
(B) All water uses are protected by the "isolation" provisions of Chapter 6 of the
Uniform Plumbing Code; and
(C) There are no auxiliary water supplies;and
(D) There are no solar heating systems; and
(E) There are no permanent swimming pools; and
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(F) There are no commercial/industrial fluid systems;and
(G) The entire facilities and all pertinent circumstances and conditions are fully
accessible for inspection by representatives of the City's Water and Pollution
Control Department.
(iv) No backflow prevention assembly is required for containment when a total exemption is
granted.
(v) A total exemption shall be granted when a partial exemption has been granted and all of
the following conditions precedent are met:
(A) There is only one service connection, not including services for fire protection
systems; and
(B) The facility is less than four stories above grade.
(vi) Failure of the Administrative Authority to notify a customer that they do not qualify for
an exemption and that they shall install backflow prevention assemblies for containment
shall in no way relieve a customer of the responsibility to comply with all requirements
of these regulations.
(vii) The Director of the City of Ames Water and Pollution Control Department may require
installation of an air gap,by and at the customer's sole expense,at the service connection
where records indicate a history of threat to the public water supply system because of
inappropriate handling of health hazard substances or actual backflow into the PWS.
(g) New Service Connections
(i) Plans shall be submitted to the Administrative Authority for review on all new service
connections in order to determine if a partial or total exemption shall be granted.
(ii) The Administrative Authority shall require the installation of the appropriate backflow
prevention assembly for containment before the initiation of water service.
(h) Fire Protection Systems
(i) A backflow prevention assembly to be used in a fire protection system shall meet the
requirements of Factory Mutual Research Corporation (FM) and Underwriters
Laboratory(UL) and the requirements of the fire code and the building code of the City
of Ames, in addition to the requirements of paragraph28.209A(1)(a)(2)(a). Assemblies
sized smaller than 2-1/2 inches which have not been tested by FM and listed by UL may
be allowed if approved by the City of Ames Fire Department Chief.
(ii) An RP shall be installed on all new and existing fire protection systems which the
Administrative Authority determines to have any of the following:
(A) Interconnections with auxiliary supplies such as reservoirs, rivers, ponds, wells,
mills,or other industrial water systems; or
(B) Use of antifreeze or other additives in the fire protection system unless an RP is
used to isolate the loop or branch containing antifreeze or other additives when a
DC is installed at the service connection;or
(C) Any other facility,connection, or condition which may cause contamination
(iii) A DC will be required for all other fire protection systems. The DC shall be required on
all new systems at the time of installation and on existing systems at the time that they
are modified.
(i) Portable Tanks. Portable tanks and vessels shall be filled through a properly installed and
maintained backflow prevention assembly or vacuum breaker.
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(j) Installation of Backflow Prevention Assemblies
(i) All backflow prevention assemblies for containment shall be installed so that they are
accessible for testing as stated in the UPC at Section 603.4.3 thereof. The installation
shall also provide the same clearances as called for the water meter in the City of Ames
Municipal Code, Section 28.205.(3).
(ii) The required backflow prevention assemblies for containment shall be installed in
horizontal plumbing immediately following the meter or as close to that location as
deemed practical by the Administrative Authority unless approved in writing by the
Administrative Authority. In any case, it shall be located upstream of any branch piping.
Installation at this point does not eliminate the responsibility of the customer to protect
the water supply system from contamination or pollution between the backflow
prevention assembly and the water main, and to protect the water supply system from
contamination or pollution within the premises.
(iii) If hot water is used within the water system, thermal expansion shall be provided for
when installing a backflow prevention assembly for containment.
(iv) If interruption of water service during testing and repair of backflow assemblies for
containment is unacceptable to the customer, another backflow prevention assembly for
containment, sized to handle the temporary water flow needed during the time of test or
repair,shall be installed in parallel piping.
(k) Removal of Backflow Prevention Assemblies. The use of an assembly may be discontinued and
the assembly removed from service upon presentation of sufficient evidence that the customer
qualifies for an exemption.
(1) Testing of Backflow Prevention Assemblies. When water service has been terminated for non-
compliance, the backflow prevention assembly for containment shall be repaired or replaced and
then tested prior to the resumption of water service.
(m) Backflow Incidents
(i) The customer shall immediately notify the Administrative Authority when the customer
becomes aware that backflow has occurred in the building, property, or private water
system receiving water service.
(ii) The Administrative Authority may order that water service be temporarily shut off when
backflow occurs in a customer's building,property, or private water system. Such shut off
is to protect the system from further contamination or pollution and to allow time for
locating and mitigating the cause and extent of the contamination or pollution.
(n) Existing Backflow Prevention Assemblies For Containment. All backflow prevention
assemblies for containment installed prior to November 1, 1996,that do not meet the requirements
of these regulations but were approved testable assemblies for the purpose described herein at the
time of installation and that have been properly installed and maintained, shall, except for the
testing, inspection, and maintenance requirements under Section(x) and Section(xi),be excluded
from the requirements of these rules so long as the Administrative Authority is assured that they
will satisfactorily protect the PWS. Whenever the existing assembly for containment is moved
from the present location,requires replacement, or when the use of the service area protected by
the assembly changes so that the Administrative Authority determines that the customer no longer
qualifies for a partial exemption, the unit shall be replaced by an approved backflow prevention
assembly for containment meeting the requirements of these regulations.
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(o) Customer Non-compliance
(i) In case of non-compliance with these regulations, the Administrative Authority shall
notify the customer to comply within ten working days. In the event of failure or upon
refusal of the customer to comply as ordered, the Administrative Authority may, after
notice and reasonable opportunity for hearing, terminate water service. Non-compliance
includes,but is not limited to,the following:
(A) Refusal to allow the Administrative Authority access to the property to
determine if the conditions for a partial or total exemption have been satisfied,
except when an RP or air gap is properly installed for containment and properly
maintained;or
(B) Providing inadequate backflow prevention; or
(C) Failure to install a backflow prevention assembly for containment which has
been required by the Administrative Authority; or
(D) Failure to test, maintain, or properly repair a backflow prevention assembly for
containment as required by the Administrative Authority;or
(E) Failure to comply with the requirements of these regulations;or
(F) Refusal to replace a faulty backflow prevention assembly;or
(G) Removal of a backflow prevention assembly for containment which has been
required by the Administrative Authority except for seasonal removal;or
(H) Bypassing of a backflow prevention assembly for containment which has been
required by the Administrative Authority; or
(I) Failure to report a backflow incident; or
(J) Direct connection between the PWS and a sewer line; or
(K) A situation which presents an immediate health hazard to the PWS.
(ii) If non-compliance is determined, the Administrative Authority will take the following
steps:
(A) Make a reasonable effort to advise the customer of intent to terminate water
service; and
(B) Terminate water service and lock service valve. The water service will remain
inactive until correction of the violation has been approved by the
Administrative Authority.
(p) Committee of Adjustment. There is hereby established the Containment Committee of
Adjustment.
(i) The Committee shall consist of three members as follows: the Building Official of the
City or that official's designee; the Director of Water and Pollution Control or the
Director's designee; and a representative of the Building Board of Appeals, selected from
among the members of that Board by majority vote of the Board's members.
(ii) The said Committee of Adjustment shall have the following powers:
(A) To hear and decide appeals that allege an error in any decision or determination
made in the administration and enforcement of Section 28.209B of the
Municipal Code of the City of Ames,Iowa; and
(B) To authorize, in specific cases, a time extension for compliance with Section
28.20913 of the Municipal Code of the City of Ames, Iowa, as will not be
contrary to the laws of the State of Iowa,when due to special circumstances not
of the property owner's own creation, a strict literal interpretation of Section
28.209B would result in undue expenses to the property owner in view of an
alternative measure agreed to by the property owner that will not be contrary to
the public interest.
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(q) Presumptive Exemptions. The following water uses shall generally be presumed exempt from
the containment requirements of Section 28.209B: water closets, lavatories, bath tubs, showers,
water softeners, single-faucet water treatment units, boilers, sinks, irrigation systems, clothes
washers, dishwashers, pre-rinse stations, garden hose connections, drinking fountains, urinals,
carbonators/beverage dispensers,garbage disposals,ice makers, cleaning chemical dispensers, and
private fire hydrants. However, when warranted by the facts and circumstances of a particular
situation, the Administrative Authority, with notice and opportunity to be heard extended to the
property owners,may apply to the Containment Committee of Adjustment for a determination that
containment measures are required under such facts and circumstances.
(2) Section 603.4.2 Testing is amended by adding new subsections 603.4.2.1 through 603.4.2.5:
(a) Backflow prevention assemblies which are in place,but have been out of service for more than
three months,shall be tested before being put back into service. Backflow prevention assemblies
used in seasonal applications shall be tested before being put into operation each season.
(b) The Authority Having Jurisdiction may periodically verify test procedures and results.
(c) When warranted,the Authority Having Jurisdiction may require backflow prevention assemblies
to be tested at any time in addition to the annual testing requirement. Examples of this include,
but are not limited to,assemblies with a history of repeated failures or assemblies that have been
subjected to fire, flood,or other unusual environmental conditions.
(d) The tester shall report the results of all inspections and tests of a backflow prevention assembly to
the customer and to the Authority Having Jurisdiction on a form approved by the Authority
Having Jurisdiction within ten working days. The tester shall immediately report to the Authority
Having Jurisdiction when and where a test indicates that an assembly fails to meet standards and
no immediate repair is done to make the assembly meet standards.
(e) Before being placed back into service,any backflow prevention assembly which fails a test shall
be repaired or replaced. In the case when a reported value is less than the minimum,the Director
of the City of Ames Water and Pollution Control Department may approve temporary restoration
of service."
(3) Section 603.4.8 Drain Lines is amended inserting at the start of the section the following:"Provisions
shall be made to convey the discharge of water from any reduced-pressure principle backflow prevention
assembly(RP)to a suitable drain."
(4) Section 603.4.9 Prohibited Locations is amended by adding at the end of the section the following:
`Backflow prevention devices with atmospheric vents or ports shall be protected from flooding. No
backflow prevention device shall be installed in a place where it would create a safety hazard such as,but
not limited to,over an electrical panel or above ceiling level."
(5) Section 603.4 General Requirements is amended by adding anew Section 603.4.10 Repairs as follows:
(a) All repairs to backflow prevention assemblies shall be performed by registered backflow
prevention assembly testers.
(b) The tester shall not change the design,material,or operational characteristics of a backflow
prevention assembly during repair or maintenance. The tester shall use only original manufacturer
replacement parts or equivalent parts approved by the University of Southern California—
Foundation for Cross-Connection Control and Hydraulic Research."
Section Two.A violation of any provision of this ordinance shall be a municipal infraction punishable by a
penalty of$500 for a first offense,a penalty of$750 for a second offense,and$1,000 for each succeeding offense.
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Section Three. All ordinances, or parts of ordinances,in conflict herewith are hereby repealed to the extent of such
conflict, if any.
Section Four. This ordinance shall be in full force and effect from and after its passage and publication as required
by law.
Passed this day of 2021.
Diane R.Voss,City Clerk John A.Haila,Mayor
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ORDINANCE NO.
AN ORDINANCE TO AMEND THE MUNICIPAL CODE OF THE CITY
OF AMES, IOWA, BY REPEALING SECTIONS 5.100(11), 5.100(12),
5.100(13), 5.206, 5.207, AND 5.208 AND ENACTING NEW SECTIONS
5.100(11), 5.100(12), 5.100(13), 5.206, AND 5.208 THEREOF, FOR THE
PURPOSE OF UPDATING THE MECHANICAL,GAS AND PLUMBING
CODES, REPEALING ANY AND ALL ORDINANCES OR PARTS OF
ORDINANCES IN CONFLICT TO THE EXTENT OF SUCH CONFLICT;
PROVIDING A PENALTY; AND ESTABLISHING AN EFFECTIVE
DATE.
BE IT ENACTED,by the City Council for the City of Ames,Iowa,that:
Section One. The Municipal Code of the City of Ames,Iowa shall be and the same is hereby amended by
repealing sections 5.100(11)-(13),5.206, 5.207,and 5.208 and enacting a new Sections 5.100(11)-(13),5.206,and
5.208 as follows:
"CHAPTER 5
Building, Electrical, Mechanical and Plumbing Code
Sec. 5.100 TITLE&ADOPTION
(11) Mechanical. The provisions of the International Mechanical Code(IMC)2021 Edition,published
by the International Code Council,4051 West Flossmoor Road,Country Club Hills,IL 60478,are hereby adopted by
reference with amendments as the City of Ames Mechanical Code.
(12) Plumbing.The provisions of the Uniform Plumbing Code(UPC), Sections 101 and 102 and
Chapters 2 through 17 of the Uniform Plumbing Code,2021 Edition,as published by the International Association
of Plumbing and Mechanical Officials,4755 E.Philadelphia Street,Ontario, California 91761-2816,are hereby
adopted by reference with amendments as the City of Ames Plumbing Code.
(13) Gas. Fuel gas piping shall comply with the requirements of Chapter 12 of the Uniform Plumbing
Code, 2021 Edition, as published by the International Association of Plumbing and Mechanical Officials, 4755 E.
Philadelphia Street, Ontario, California 91761-2816 and adopted by the City of Ames with amendments,unless the
provisions conflict with the Iowa Administrative code (IAC) 661-Chapter 226, Liquified Petroleum Gas. Where
Chapter 12(2021UPC)conflicts with 661-chapter 226(IAC),the provisions of Chapter 226 shall be followed.
Section 5.206. MECHANICAL.
The adopted provisions of the 2021 International Mechanical Code(IMC),are amended as follows:
(1) Section 101.2 Scope.is amended by deleting the words `by the International Fuel Gas Code' in the last
sentence and inserting the following in lieu thereof. `by Chapter 12 of the UPC as stated in Section
5.100(13)of this Chapter'.
(2) Section 101.2 Scope.is amended by deleting the following: "Exception:Detached one-and two-family
dwellings and townhomes not more than three stories above grade plane in height with a separate means
of egress and their accessory structures not more than three stories above grade plane in height shall
comply with this code or the International Residential Code."
(3) Section 304.11 Guards. is amended by deleting the exception and inserting the following new
exception in lieu thereof: "Exception: Guards are not required where permanent fall arrest/restraint
anchorage connector devices that comply with ANSI/ASSE Z 359.1 are affixed for use during the
entire lifetime of the roof covering.The devices shall be evaluated for possible replacement when the
entire roof covering is replaced.The devices shall be placed not more than 10 feet(3048 mm)on
center along hip and ridge lines and placed not less than 10 feet(3048 mm)from roof edges and the
open sides of walking surfaces."
(4) Section 306.1 Access. is amended by deleting the last sentence and inserting the following in lieu
thereof "An unobstructed level working space at least 30 inches deep and 30 inches wide shall be
provided on any side of equipment where service access is required.The authority having jurisdiction
may approve service reductions prior to equipment installation,provided that the manufacturer's
instructions are met."
(5) Section 306.2 Appliances in rooms. is amended by deleting this section in its entirety and inserting
the following section in lieu thereof: "Section 306.2 Appliances in Rooms and Closets. Rooms and
closets containing appliances shall be provided with a door and an unobstructed passageway measuring
not less than 36 inches wide and 80 inches high.A level service space not less than 30 inches deep and
30 inches wide shall be present at the front service side of the appliance with the door open."
(6) Section 306.5. Equipment and appliances on roofs or elevated structures.is amended by adding
the following to the end of the section: "If the tenants of a multiple tenant building have,or are allowed
to have,mechanical facilities on the roof or which penetrate the roof,then roof access ladders must be
provided for use by all such tenants and their agents and contractors in a manner that does not require
accessing space under the control of another tenant."And deleting the following exception"Exception:
This section shall not apply to Group R-3 occupancies."
(7) Section 306.5.3 Visual screening of rooftop equipment. is amended by adding the following new
subsection: "Section 306.5.3 Visual screening of rooftop equipment.Equipment screening shall not
be installed to the rooftop unit or the curb of the rooftop unit unless specified in the mechanical
equipment manufacturer's installation instructions."
(8) Section 401.1 Scope.is amended by deleting the section in its entirety and inserting the following
section in lieu thereof. "Section 401.1 Scope.This chapter shall govern the ventilation of spaces
within a building intended to be occupied. These buildings shall meet either the requirements of
ASHRAE Standard 62.1,"Ventilation for Acceptable Indoor Air Quality,"2019 edition,published by
the American Society of Heating,Refrigeration,and Air-Conditioning Engineers, 1791 Tullie Circle
N.E.,Atlanta, GA 30329,or the requirements contained in this chapter. Mechanical exhaust systems,
including exhaust systems serving clothes dryers and cooking appliances;hazardous exhaust systems;
dust,stock, and refuse conveyor systems; sub slab soil exhaust systems; smoke control systems; energy
recovery ventilation systems; and other systems specified in Section 502 shall comply with Chapter 5
of the 2021 International Mechanical Code."
(9) Table 403.3.1.1 Minimum Ventilation Rates: is amended by adding the following footnotes:
i. For gym, stadium, arena (play area) categories of the sports and amusement occupancy
classification, when combustion equipment is intended to be used on the playing surface, additional
dilution ventilation and/or source control shall be provided.
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j. For ventilation purposes,"smoking"includes both combustible tobacco products and accessories
and electronic smoking devices and accessories.
(10)Section 504.9.2 Duct installation. is amended by deleting the section in its entirety and inserting the
following section in lieu thereof: "504.8.2 Duct installation. Exhaust ducts shall be supported at 4-foot
(1219 mm)intervals and secured in place.The insert end of the duct shall extend into the adjoining duct
or fitting in the direction of airflow.Ducts shall not be joined by screws or similar fasteners that protrude
into the inside of the duct."
(11)Section 506.3.13.3 Termination location. is amended by deleting the section in its entirety and
inserting the following new section in lieu thereof: "506.3.13.3 Termination location.Exhaust outlets
shall be located not less than 10 feet(3048 mm)horizontally from parts of the same or contiguous
buildings,adjacent buildings and adjacent property line and shall be located not less than 10 feet(3048
mm)above the adjoining grade level.Exhaust outlets shall be located not less than 20 feet
horizontally/vertically from or not less than five(5)feet above air intake openings and operable doors
and windows into any building."
(12)Section 507.3 Type II Hoods. is amended by deleting the first sentence in its entirety and inserting the
following sentence in lieu thereof: "Type II hoods shall be installed above dishwashers capable of
heating water beyond 140 degrees Fahrenheit and appliances that produce heat or moisture and do not
produce grease or smoke as a result of the cooking process, except where the heat and moisture loads
from such appliances are incorporated into the HVAC system design or into the design of a separate
removal system."
(13)Section 508.1.1 Makeup air temperature. is amended by deleting the section in its entirety and
inserting the following section in lieu thereof:"Section 508.1.1 Makeup air temperature. All kitchen
makeup air systems shall be verified by a certified TAB(testing and balance)contractor to heat and cool
makeup air to within 10 degrees of room temperature set point.The TAB contractor shall be certified by
NEBB,TABB, or other certifying organization as approved by the Authority Having Jurisdiction."
(14)Section 601.5 Return air openings. is amended by adding the following two additional requirements
for return air openings:
"9.Return air openings shall be located at least 18 inches from supply air openings.Air throw shall
be directed away from return air openings to reduce short cycling of air. Exception: Factory-made
concentric duct terminations.
10. One return air opening per floor is required on a central duct return system per ACCA Manual
D, Appendix 8. Return air transfer openings are required on all bedrooms when dedicated return air
openings are not used."
(15)Section 603 Duct Construction and Installation.is amended by adding the following new subsection:
"603.1.1 Duct location.Air plenums and ducts located in floor and wall cavities shall be separated from
unconditioned space by construction with insulation to meet energy code requirements. These areas
include but are not limited to exterior walls, cantilevered floors,and floors above garages."
(16)Section 604.3 Coverings and linings. is amended by deleting the section in its entirety and inserting
the following new section in lieu thereof: "604.3 Coverings and linings.Duct coverings and linings,
including adhesives where used, shall have a flame spread index of not more than 25 and a smoke-
developed index of not more than 50,when tested in accordance with ASTM E84 or UL 723,using the
specimen preparation and mounting procedures of ASTM E2231.Duct coverings and linings shall not
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flame,glow, smolder or smoke when tested in accordance with ASTM C411 at the temperature to
which they are exposed in service. The testing temperature shall not fall below 250OF(121°C).
Coverings and linings shall be listed and labeled. The use of an air gap to meet R-value requirements
for duct insulation shall be prohibited."
(17)Section 607.6.2 Membrane Penetrations is amended by adding the following exception: "Exception:
Duct systems that originate and terminate entirely within one dwelling/sleeping unit and are constructed
entirely of minimum 0.0187-inch-thick steel (No. 26 gauge) shall be allowed without installation of
radiation dampers."
(18)Section 607.6.2.1.3. is amended by is amended by adding the following new subsection: "607.6.2.1.3
Access. Access to ceiling radiation dampers shall be provided with an approved means of access that is
large enough to permit inspection and maintenance of the damper and its operating parts. Dampers
equipped with fusible links,internal operators for both shall be provided with either an access door that
is not less than 12 inches(305mm)square, or a removable duct section."
(19)Section 607.6.2.1.4.is amended by inserting the following new section: "607.6.2.1.4 Identification of
access. Access to ceiling radiation damper locations and access points shall be permanently identified
on the exterior by a label or marking acceptable to the authority having jurisdiction."
Sec.5.208 PLUMBING.
The adopted provisions of the 2021 Uniform Plumbing Code(UPC),are amended as follows:
(1) Section 102.4.1 Building Sewers and Drains. is amended by adding the following new section:
"Section 102.4.1.1 Building Demolition. Whenever a structure or building is to be demolished,before
demolition begins the following must be completed:
(a)Building sewer capped at curb line with a manufactured plug.
(b)Foundation line capped at curb line with a manufactured plug.
(c)Water service capped or plugged at main.
(d)Plumbing inspector sign-off on demolition sheet given to contractor before demolition
permit is issued."
(2) Section 102.0 Applicability. is amended by adding a new subsection "Section 102.9 Annexed
Building.When a structure or building is on land that has been or is being annexed into the City of Ames
and connection to the public water or sewer system is requested for that building or structure,the City
may require that its plumbing system be inspected to determine whether the system has adequate sewer
venting and backflow prevention to protect the public water system, and to determine if it is otherwise
free from hazards to those exposed or potentially exposed to that system. Based on that inspection,if it
is determined that a cross connection or other hazard exists,then the Building Official shall determine
what corrective action is needed to eliminate the hazard(s)and the owner shall complete the corrective
action before connection to City services is allowed."
(3) Section 301.5 Alternative Engineered Design.is amended by adding the following sentence to the end
of the section:"No engineered single-stack drainage system shall be installed."
(4) Section 309.6 Dead Legs.is amended by adding the following sentence to the end of the section: "The
authority having jurisdiction can determine the method of flushing."
(5) Section 312.6 Freeze Protection.is amended by adding the following at the end of the section:"Systems
requiring protection from freezing shall be buried no less than five(5)feet in depth from finished grade.
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If this depth cannot be maintained,the sides and top of pipe wall shall be covered with 1 %"blue board
insulation. The sides of the insulation shall be at least five(5)feet in depth."
(6) Section 314.4.1 Installation of Thermoplastic Pipe and Fittings. is deleted in its entirety and a new
section is inserted in lieu thereof: "Section 314.4.1 Installation of Thermoplastic Pipe and Fittings.
Trench width for thermoplastic pipe shall be limited to six times the outside diameter of the piping at
the base. Thermoplastic piping shall be bedded in not less than 4 inches(102 mm)of aggregate
bedding material supporting the pipe.Initial backfill shall encompass the pipe.Aggregate material
shall be three-eighths(3/8)inch p-gravel or 1-inch clean class one bedding."
(7) Section 402.5 Setting.is amended by adding the following sentence to the end of the section that
begins"Exception:": "Sanitary napkin receptors are not dispensers and shall not be within the clear
space of the water closet."
(8) Section 407.3 Limitation of Hot Water Temperature for Public Lavatories.is amended by adding
the following sentence to the end of the section: "These devices shall be installed at or as close as
possible to the point of use."
(9) Section 408.3.2 Temperature Limiting.
Amend this section by adding the following to the end of(3): "and installed at or as close as possible to
the point of use."
Amend this section by adding the following to the end of(5): "may be used downstream of other
allowed device. TAFR valves are not intended to be installed in place of devices complying with
ASSE 1016,ASSE 1017,ASSE 1066,ASSE 1069, or ASSE 1070."
(10)Section 408.0 Showers.is amended by adding a new subsection: "Section 408.11 Shampoo Bowls
and Grooming Stations.Limitation of Hot Water Temperature of Hair Shampoo Bowls and Pet
Grooming Stations. The maximum hot water temperature discharging from hair shampoo bowls and
pet grooming stations shall be limited to 120°F(49°C). The maximum temperature shall be regulated
by one of the following means,which shall be installed at or as close as possible to the point of use:
"(1)A limiting device conforming to ASSE 1070,ASME Al12.1070,CSA B125.70,or
CSA B125.3.
"(2)A water heater conforming to ASSE 1084."
(11)Section 409.4 Limitation of Hot Water in Bathtubs and Whirlpool Bathtubs. is amended by
adding the following sentence to the end of the section: "These devices shall be installed at or as close
as possible to the point of use."
(12)Section 410.3 Limitation of Water Temperature in Bidets.is amended by adding the following
sentence to the end of the section: "These devices shall be installed at or as close as possible to the
point of use."
(13)Section 416.5 Drain.is amended by deleting the last sentence,which states: "Where a drain is
provided,the discharge shall be in accordance with Section 811.0."
(14)Section 418.3 Location of Floor Drains is amended by adding the following new subsection:
"418.3(5)In all buildings,a three-inch(3")floor drain shall be located on the lowest floor level and
where the water meter is located.A three-inch(3")or larger floor drain shall be located in the same
5
room where a reduced pressure principal backflow prevention assembly is installed that discharges
water.A two-inch(2")or larger floor drain shall be provided in the same room the water heater is
located on the lowest floor level.
Exception: Existing water heaters and water meters unless relocated."
(15)Section 422.1 Fixture Count.
(1)Amend the section by deleting the first paragraph and inserting the following in lieu thereof:
"Plumbing fixtures shall be provided in each building for the type of building occupancy and in the
minimum number shown in Table 2902.1 and its associated foot notes of the 2021 International
Building Code.Required public facilities shall be designated by a legible sign for each sex. Signs shall
be readily visible and located near the entrance to each toilet facility."
(2)Amend the section by deleting the second paragraph and inserting the following in lieu thereof:
"The minimum number of fixtures shall be calculated at 50 percent male and 50 percent female based
on the total occupant load.Where information submitted indicates a difference in the distribution of the
sexes, such information shall be used to determine the number of fixtures for each sex. Once the
occupancy load and occupancy are determined,Table 2902.1 of the 2021 International Building Code
shall be applied to determine the minimum number of plumbing fixtures required.When gender-
neutral restrooms are provided,the total number of fixtures provided must be the sum of men's and
women's fixtures as figured,and urinals in gender-neutral restrooms shall not be substituted for more
than 67 percent of men's water closets in assembly and educational occupancies or 50 percent of men's
water closets in all other occupancies. Where gender-neutral fixtures are provided in addition to
separate men's and women's facilities,those gender-neutral fixtures shall be included in determining
the number of fixtures provided in an occupancy. Where applying the fixture ratios in Table 2902.1
results in fractional numbers, such numbers shall be rounded to the next whole number.For multiple
occupancies,fractional numbers shall be first summed and then rounded to the next whole number."
(16)Section 422.1.1 Family or Assisted-Use Toilet and Bathing Facilities.is amended by adding the
following sentence to the end of the section:"Required family or assisted-use fixtures are permitted to
be included in the number of required fixtures for either the male or female occupants in assembly and
mercantile occupancies."
(17)Table 422.1 Minimum Plumbing Facilities.Delete the table.
(18)Section 422.2 Separate Facilities.is amended by adding the following additional exception: "(4)
Separate facilities shall not be required where rooms having both water closets and lavatory fixtures
are designed for use by any gender and sufficient privacy for water closets is installed.Partitions or
compartment walls shall extend from no more than 1 inch from the floor to no less than 84 inches from
the floor. Urinals shall be located in an area visually separated from the remainder of the facility or
each urinal that is provided shall be located in a stall."
(19)Section 422.0 Minimum Number of Required Fixtures.is amended by inserting the following new
subsection: "422.6 Substitution for Water Closets. "In each bathroom or toilet room,urinals shall not
be substituted for more than 67 percent of the required water closets in assembly and educational
occupancies.Urinals shall not be substituted for more than 50 percent of the required water closets in
all other occupancies. (Reprinted from the 2018 International Plumbing Code section 424.2)"
(20)Section 603.0 Cross-Connection Control. is amended by deleting the text and inserting the following
in lieu thereof. "Section 603.0 Cross-Connection shall be in compliance with Section 28.209B of the
Ames Municipal Code."
(21)Section 604.6 Cast-Iron Fittings is deleted.
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(22)Section 604.7 Malleable Iron Fittings is deleted.
(23)Section 604.10.1 Tracer Wire.is deleted and the following is inserted in lieu thereof. "604.10.1
Tracer Wire.Plastic materials for building supply outside underground shall be installed with a 14-
gauge solid copper tracer wire in a blue jacket affixed to the pipe at appropriate intervals.The tracer
wire will start with a 5-foot electrical ground stake at the water main and be terminated at a
weatherproof junction box at an approved location on the building exterior. An appropriate splice may
be used at the water meter. The junction box shall be accessible and be labeled to identify it as a tracer
wire termination."
(24)Section 609.1 Installation. is amended by adding the following new sections 609.1.1 through 609.1.9
"Section 609.1.1 New Service Location.In a new subdivision the water service line shall be installed
at the center of the property unless otherwise approved by the Administrative Authority.
Section 609.1.2 Threaded Taps on Water Mains. All threaded taps on the main shall be at least 24
inches apart and shall be at least 3/a inch in size. If more than one tap is made for a service line,the taps
will be staggered on the pipe.No more than three(3)threaded taps shall be made for a service connected
to a 4-inch or larger main.Maximum threaded tap size for a 4-inch main is 3/a inch.All taps will be made
in the top half of the water main,but not more than 45" above the horizontal plane. All services having
two (2) taps or more shall be combined through a brass wye pipe connection. The maximum length of
service from the main to the wye shall be four(4)feet. The following table lists appropriate number of
taps for different service sizes.
Service Size Taps
1 inch=two 3/a inch or one 1 inch
1'/a inch=two 1 inch
1'/z inch=two 1 inch
Section 609.1.3 Corporation Cock Required.A corporation cock of either a Mueller or Ford make,or
its equivalent,shall be inserted in every tap one-and one-half inch or less in diameter made in the water
main. The connection to the main shall be made by a regulation corporation cock and copper service
with a compression joint if the pipe is plastic SIDR-7 200 P 3408. All connections to the water main
shall be adequately looped to prevent breakage from ditch settlement.
Section 609.1.4 Service Valve Required. A service valve shall be installed immediately following a
two(2)inch or larger tap on all take offs from the water main or private main.
Section 609.1.5 Service Saddles. Service saddles allowed on four(4)inch or larger water mains when
water service is 3/a", 1", 1'/a", and 1'h" shall have a stainless-steel strap with two bolts wide minimum.
The bolts or nuts shall be either stainless steel or blue coated. When tapping a four (4) inch or larger
main for water services for a two(2)inch or larger water service,the service saddle shall be a stainless-
steel full wrap around saddle.The bolts and nuts shall be either stainless steel or blue coated.Any water
service that is larger than a two(2) inch shall require a tapping valve and sleeve at the main or private
main. The Post Indicator Valve (PIV) for fire line shall not serve as the water service valve after the
main.All tapping valve sleeves shall meet the Urban Standard Specifications as follows:
(1)Valve: Tapping valve conforming to ANSI/AWWA C509.
(2) Sleeve:
(a)Minimum 14 gauge
(b) Stainless steel,ASTM A240,Type 304
(c)Working pressure 200 psi.
(d)Must fully surround pipe
(3)Gasket:
(a)To completely surround pipe
(b)Minimum thickness 0.125 inch
(c)Material:nitrile rubber.
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(4)Outlet Flange:
(a)Stainless steel,ASTM A240,Type 304
(b)ANSI B 16.1, 125 pound pattern
(5)Bolts: Stainless steel,ASTM A240,Type 304
Section 609.1.6 Curb Stop required.There shall be a curb stop in every service connection to the main.
It shall be located on the property line or as close as possible thereto and in alleys within one foot of the
alley line,except two(2)inch and larger,which shall have a street valve box over the valve at the water
main.Curb Stops shall be of the quarter turn ball valve type with the grip joint ends.The curb stop to be
used for services from three-fourths(3/a)inch to two(2)inches shall be the style known as Mueller Mark
II Oriseal or Ford Ball Valve with 90' curb stop, or equal,provided with T handle and extension rod
keyed and locked to curb stop and shall be the same diameter as the pipe served. The curb stop shall be
kept in an operative condition at all times.
Section 609.1.7 Curb Box required. The curb stop shall be covered by a curb box of the Western
pattern No. 100,or equal,extending to the curb grade.In cases where the surface of the ground is higher
than the curb grade to the extent that the curb box will not extend sufficiently to be in plain view, then
the curb box shall be extended to the ground surface. Whenever a water service is renewed the curb box
shall be brought to the curb grade or present natural ground level and moved to the property line. In
placing the curb stop in position,care must be exercised to provide against settlement of the curb box,
by providing a base of brick, stone or concrete block set on solid earth for support. A support shall be
placed across the ditch and wired to the curb box near the top to keep it in a vertical position while filling
the ditch. In the event a curb box is set in any location where a concrete or asphalt surface is to be placed,
a sleeve shall be placed around the cap to allow for expansion and contraction.
Section 609.1.8 Water Services Serving Fire Sprinkler Systems. Sprinkler systems used for fire
protection may be permitted to be attached to the water mains by a licensed Plumbing Contractor. No
open connection can be incorporated in the system,and there shall be no valves except the service valve
at the main unless a post indicator valve (PIV) is required. One- and two-family residential sprinkler
lines shall be metered through the single meter. The property owner or tenant shall promptly report to
the City any seal which has been broken for the closing of the system.A detailed drawing of the sprinkler
system shall be filed with the City and free access to the building shall be granted the City for inspection
purposes. Water services shall be sized to accommodate the requirements of the fire sprinkler system.
Section 609.1.9. Where required,a post indicator valve(PIV)must be set at 36"above final grade.The
termination flange, inside the building, shall not be more than twelve (12) inches above finished floor
level and be set at a true vertical position.When entering through a wall,the termination flange shall not
be more than twelve (12) inches from the wall and set in a true horizontal position. The fire line shall
have a two hundred(200)pound pressure test done for a minimum of two(2)hours without losing any
pressure. The fire line shall be tested from the tap at the main to the termination flange with the PIV
open and the curb box closed.
A certified fire sprinkler installer may install the backflow device to the sprinkler system for
containment.The termination flange,inside the building,from horizontal to the vertical position or from
horizontal to the horizontal position traveling through an exterior wall or floor, shall have no smaller
than 3/4 inch galvanized or equivalent all-thread rod used between said flanges to keep fire line
termination stable. The fire line located in the trench may use mega-lug type supports, however, a
concrete thrust block shall be in front of fire line traveling from horizontal to vertical prior to the
termination flange. Only PVC C-900 DR 14 and ductile iron shall be used for the fire line service. The
fittings shall be mechanical joint type. The tapping valve, PIV, and all other fittings and pipe shall be
marked to withstand 200 p.s.i.
(a)If the fire line and water service are on one line,the domestic water service shall have the
take off so that the domestic service will have a curb stop and stop box at the property line. If a
PIV is required,the domestic service will branch off prior to the PIV and have a curb stop and
stop box adjacent to the PIV. The take off for the water service shall be either brass, ductile
iron,C-900 PVC DR14,or copper to the curb box.
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(b) The curb stop and stop box may be installed at another location with prior approval from
the Authority Having Jurisdiction.
(25)Section 609.12 Pipe Insulation. is deleted in its entirety and the following section is inserted in lieu
thereof."Section 609.12 Pipe Insulation.Insulation of domestic hot water piping shall be in accordance
with the applicable energy conservation code."
(26)Section 610.1 Size,Size of Potable Water Piping,is amended by deleting the words"each water meter
and" from the first sentence and adding"Water meter sizing shall be determined by the Water Meter
Division"to the end of the section.
(27)Table 610.4 Fixture Unit Table for Determining Water Pipe and Meter Sizes is amended by deleting
footnote 2 and inserting the following in lieu thereof: `Building supply, one (1) inch nominal size
minimum."
(28)Section 610.8 Size of Meter and Building Supply Pipe Using Table 610.4 is amended by adding the
following exception.
"Exception: Where a single water service line provides service to a new duplex or is split for any other
reason, the service line shall be at least one inch in diameter. Where an existing structure is to be
converted to a duplex a 1" equivalent service may be provided by a separate tap. The new service lines
shall be divided by a wye at the property line. Existing 1" services may be split inside the building so
long as shut-offs are available in a common area. Separate curb boxes shall be installed,and separate 3/a
inch service lines shall be run to the individual customer units."
(29)Section 610.8(6)Size of Meter and Building Supply Pipe Using Table 610.4 is amended by deleting
the last sentence and inserting the following in lieu thereof: "No building water service line shall be less
than one(1)inch diameter."
(30)Section 611.4 Sizing of Residential Softeners. is amended by adding the following to the end of the
last sentence in the section:"or as specified in the manufacturer's installation instructions."
(31)Section 612 Residential Fire Sprinkler Systems. is amended by deleting sections 612.0 through
612.7.2.
(32)Table 702.1 Notes.Note#8.is amended by adding the following at the end of the footnote: "Public use
shall be any building or structure that is not a dwelling unit.Fraternities and sororities are not classified
by this section as a dwelling unit."
(33)Table 702.1 Notes. Note#9. is amended by deleting"a maximum shower size of 36 inches (914 mm)
in width and 60 inches(1524 mm)in length"and inserting the following in lieu thereof:"showers having
only one shower head rated at a maximum of 2.5 gpm."
(34)Section 703.1 Minimum Size,Size of Drainage Piping,is amended by adding the following at the end
of the section: "No underground drainage piping or vent shall be less than two (2) inches inside
diameter."
(35)Section 704.3 Commercial Sinks is deleted in its entirety and the following section inserted in lieu of:
Section 704.3 Commercial Sinks. "Pot sinks, scullery sinks, dishwashing sinks, silverware sinks, and
other similar fixtures shall have an airgap indirect waste connection to a properly trapped and vented
9
floor sink. Commercial kitchens must have at least one floor sink with a three-inch waste line serving
the main scullery sink."
(36)Section 715.2 Joining Methods and Materials is amended by adding the following exception: "No
molded rubber coupling shall be used on any sanitary sewer or storm sewer. Appropriate stainless steel
shielded molded rubber couplings may be used as connections when connecting sanitary or storm sewers.
Single band shielded couplings(no hub clamps)are not allowed on any exterior building sanitary sewer,
or storm sewer."
(37)Section 717.1 General, Size of Building Sewers. is amended by deleting the first paragraph and
inserting the following in lieu thereof: "The minimum size of any building sewer shall be determined on
the basis of the total number of fixture units drained by such sewer, in accordance with Table 717.1
Maximum/Minimum Fixture Unit Loading on Building Sewer Piping. No building sewer shall be
smaller than four(4)inches.The building sewer shall not be smaller than the building drain.
With prior approval from the Building Official, a sewage ejector may discharge the building sewer to
the public sewer manhole when the public main is too shallow to allow the building sewer discharge to
flow by gravity. The pipe material to be used shall be Polyethylene (P.E.) Two (2) inch SDR 7, 3408.
The two(2)inch line shall at all times be a minimum of five(5)feet deep or freeze protection is required.
The sewage ejector shall be vented with a minimum two(2)inch pipe."
(38)Section 718.2 Support. is deleted in its entirety and the following section inserted in lieu thereof:
"Section 718.2 Support. Building sewer pipe made of cast iron, copper, or extra strength vitrified clay
shall be laid on a firm bed.Pipe consisting of Schedule 40 PVC/ABS,PVC SDR 23.5/35 and PVC truss
pipe shall be enveloped on bottom, sides and top with a minimum of four (4) inches of either one (1)
inch clean or 3/8"minus crushed rock, 3/8"washed chip or"pea gravel".After enveloping the pipe,the
remainder of the ditch may be filled once the inspection is complete."
(39)Section 719.6 Manholes is amended by deleting the second paragraph.
(40)Section 807.3 Domestic Dishwashing Machine. is deleted in its entirety and the following section is
inserted in lieu thereof: "Section 807.3 Domestic Dishwashing Machine. No domestic dishwashing
machine shall be directly connected to a drainage system or food waste disposer without the use of an
approved dishwasher air gap fitting on the discharge side of the dishwashing machine,or without looping
the discharge line of the dishwasher as high as possible near the flood level of the kitchen sink where the
waste disposer is connected. Listed air gap fittings shall be installed with the flood level (FL)marking
at or above the flood level of the sink or drainboard,whichever is higher."
(41)Section 814.5 Point of Discharge.is deleted in its entirety and the following section is inserted in lieu
thereof. "Section 814.5 Point of Discharge. Air-conditioning condensate waste pipes shall connect
indirectly to a properly trapped fixture, floor drain, or open sight drain, or where permitted in Section
814.6,to the drainage system through an air gap or air break to trapped and vented receptors,dry wells,
leach pits, sump pump, the tailpiece of plumbing fixtures or indirectly to the building storm sewer
through a roof drain. A condensate drain shall be trapped in accordance with appliance manufacturer's
instructions or as approved."
(42)Section 901.1 Applicability.is amended by adding the following sentence to the end of the section: "No
engineered single-stack drainage systems shall be installed."
(43)Section 901.2 Vents Required.is amended by adding the following at the end of the section:
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"All single-family or two-family dwelling units with a basement shall be provided with a two (2) inch
future vent.The future vent shall be combined with other vents or terminate through the roof Such vent
shall be capped in the floor joist area of the basement for future use.The two(2)inch vent is for a future
basement bathroom or other approved fixtures."
(44)Section 906.1 Roof Termination.is amended by deleting the last sentence.
(45)Section 906.7 Frost or Snow Closure. is amended by deleting"two (2) inches (50.8mm)" in the first
sentence and inserting"three(3)inches(76.2 mm)"in lieu thereof.
(46)Section 908.2.2 Size. is amended by deleting the second sentence in this section and inserting the
following new sentence in lieu thereof: "The wet vent shall be not less than two(2)inches(50 min)in
diameter for six (6) drainage fixture units (dfu) or less, and not less than three (3) inches (80 mm) in
diameter for seven(7)df i or more."
(47)Table 1002.2 Horizontal Lengths of Trap Arms is amended to read as follows:
Table 1002.2
Horizontal Lengths of Trap Arms
(Except for Water Closets and Similar features)1,2
Trap Arm Diameter Distance trap to vent Length Maximum
(inches) Minimum(inches) (feet)
1-1/4 2-1/2 5
1-1/2 3 6
2 4 8
3 6 12
4 8 12
>4 2 x Diameter 12
For SI units: 1 inch=25.4 min
Notes:
1 Maintain'/a inch per foot slope(20.8 mm/m).
2 The developed length between the trap of a water closet or similar fixture
(measured from the top of the closet flange to the inner edge of the vent)and its
vent shall not exceed 6 feet(1829 min).
(48)Section 1007.1 Trap Seal Protection. General. is amended by deleting "not deemed necessary for
safety or sanitation by the Authority Having Jurisdiction" and inserting the following in lieu thereof-
"floor drains or similar traps that receive a liquid discharge year-round."
(49)Section 1014.1.3 Food Waste Disposers and Dishwashers.is amended by deleting the second sentence
and inserting the following in lieu thereof. "Commercial food waste disposers shall discharge into the
building's drainage system in accordance with the requirements of the Authority Having Jurisdiction."
(50)Section 1101.6.2 Sump.is amended by replacing"fifteen(15)gpm"with"17 gpm with a 17-foot head"
and adding the following to the end of the section:"The sump pump line may be either Schedule 40 PVC
or Schedule 80 PVC pipe. The fittings shall be either schedule 80 PVC deep socket or schedule 40 deep
socket pressure fittings.The sump pump line may also be 1 '/z"polyethylene(PE)SDR 9,3408.The PE
joints shall be made with ribbed insert fittings secured by stainless steel clamps. The sump line shall be
buried no less than five(5)feet in depth from finished grade.If this depth cannot be maintained,freeze
protection shall be provided. When the sump line is discharged into a storm manhole,intake, or storm
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main that is not five(5)feet below final surface grade,a quarter('/a)of an inch hole shall be drilled into
the bottom portion of the horizontal 90°elbow before pipe is placed in the vertical position.
If two sump lines are combined together, the sump line shall be a two (2) inch line to the storm main,
intake, or manhole. The sump pump shall have an electrical outlet within reach of the manufacturer's
cord.
No foundation drain service line shall be discharged onto property, someone else's property, or into the
building drain or building sewer.No floor drain,clothes washer,or any other plumbing fixture shall be
discharged into the foundation sump pit.
Every sump pit in an elevator shaft shall meet the rules and regulations as required by the State of Iowa
for elevators.No hydraulic elevator sump shall be discharged into a storm or sanitary sewer."
(51)Section 1101.6.3 Splash Blocks is deleted.
(52)Section 1101.6.5 Open Area is deleted.
(53)Sections 1205.0 through 1205.2 Authority to Render Gas Service.are deleted.
(54)Sections 1207.0 and 1207.1 Temporary Use of Gas.are deleted.
(55)Section 1208.6.4.5 Corrugated Stainless Steel Tubing. is deleted in its entirety and the following
section is inserted in lieu thereof"Section 1208.6.4.5 Corrugated Stainless Steel Tubing.Only CSST
with an arc-resistant jacket or covering system listed in accordance with ANSI LC-1 (Optional Section
5.16)/CSA 6.26-2016 shall be installed, in accordance with the terms of its approval,the conditions of
listing, the manufacturer's instructions and this code, including electrical bonding requirements in
Section 1211.2. CSST shall not be used for through-wall penetrations from the point of delivery of the
gas supply to the inside of the structure.CSST shall not be installed in locations where subject to physical
damage unless protected in an approved manner."
(56)Section 1211.3 Arc-Resistant Jacketed CSST.is deleted
Section Two.Violation of the provisions of this ordinance shall constitute a municipal infraction
punishable as set out in Chapter 5 of the Ames Municipal Code.
Section Three. All ordinances, or parts of ordinances,in conflict herewith are hereby repealed to the extent of such
conflict, if any.
Section Four. This ordinance shall be in full force and effect from and after its passage and publication as required
by law.
Passed this day of ,
Diane R.Voss,City Clerk John A.Haila,Mayor
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