HomeMy WebLinkAbout~Master - 2021 Edition of the Uniform Plumbing Code and the 2021 Edition of the International Mechanical Code with State and local amendments, including the movement of the Cross-Connection Control requirements to Chapter 28 of the Ames Municipal Code ORDINANCE NO.4447
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 Cade
Sec.5.100 TITLE&ADOPTION
(11) Mechanical. The provisions of the International Mechanical Code(IMC)2021 Edition,published
by the International Code Council,405I 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 PIumbing 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 PIumbing 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 Iess 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 U 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 Iinings.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 250°F(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)Scction 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 0.0 1 87-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 backfIow 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 ''/z"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 I070."
(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 A112.1070,CSA B125.70,or
CSA B I25.3.
"(2)A water heater conforming to ASSE 1084."
(I 1)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
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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 Ioad.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."
(2I)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'/4 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'/4 inch.All taps will be made
in the top half of the water main,but not more than 45"above the horizontal plane.All service's 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
I inch=two inch or one 1 inch
1'/4 inch=two 1 inch
1'h 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 3/4", 1", 1'/4', and 1'/z" 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 I4 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.I25 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 Iocated on the property line or as close as possible thereto and in alleys within one foot of the
alley Iine,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 C/4)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 beset 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 '/ 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-Iug 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 I4 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
PTV 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 DRI4,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 hotwaterpiping 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%
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
6I2.7.2.
(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
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floor sink. Commercial kitchens must have at Ieast 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)dfu 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)I4
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:
11J Maintain%4 inch per foot slope(20.8 mm/m).
2 The developed Iength 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 mm).
(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('/4)of an inch hole shall be drilled into
the bottom portion of the horizontal 900elbow 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 141 day of September,2021.
Diane R. Voss,City Clerk John A. Haila, Mayor
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