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Code of Rules
BASIC PLUILBING PRINCIPLES
Iowa State Department of Health
1. . All premises intended for human habitation or occupancy
shall be provided with a supply of pure and wholesome water, neith r
connected with unsafe water supplies nor cross-connected through
plumbing fixtures to the drainage system.
2. Buildings in which water-closets and other plumbing fix-
tures exist shall be provided with a supply of water adequate in
volume and pressure for flushing purposes.
3. The pipes conveying water to water-closets shall be of.
sufficient size to supply the water at a rate required for adequat
flushing without unduly reducing the pressure at other fixtures.
4. Devices for heating water and storing it in` '"boilers,O or
hot water tanks, shall be so designed and installed as to prevent.
explosions.
50 Every building intended for human habitation or occupancy
on premises abutting on a street in which there is a public sewer
shall have a connection with the sewer, and, if possible, a eepara e
connection.
6. In multiple dwelling provided with a house drainage syst
there shall be for each family at least one private water-closet.
7. Plumbing fixtures shall be made of.-smooth, nonabsorbent
material; shall be free from eonce"aled fouling surfaces:
89 The entire house drainage system shall be so designed, eo -
structed, and maintained as to conduct the waste water or sewage
quickly from the fixture to the place of disposal with velocities
which will guard against fouling and the deposit of solids and wi
prevent clogging.
9. The drainage pipes shall be so designed and constructed a
to be proof ibr a reasonable 'life of the building, against. leakage
or water or drain air due to defective materials, imperfect connee
ions, corrosion settlements or vibrations of the ground or buildin ,:
temperature changes, freezing, or other causes.
10. The drainage system shall be provided with an adequate
umber of cleanouts or arranged that in of stoppage the pipes
ay be readily accessible.
11 Each fixture or combination fixture shall be provided with
separate, accessible, self-scouring, reliable water-seal trap
laced as near to the fixture as possible.
12. The house-drainage system shall be so designed that there
ill be adequate circulation of air in all pipes and no danger of
iphonage, aspiration, or forcing of trap seals under condition of
rdinary use.
13. The soil stack shall extend full size upward through the
oof and have a free opening, the roof terminal being so located
hat there will be no danger of air passing from it to any window
d no danger of clogging of the pipe by frost or by articles being
brown into it or of roof water draining into it.
1419 The plumbing system shall be subjected to a water or air
pressure test and to a final inspection so as to disclose all
leaks and imperfections in the work.
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15. No substances which will clog the pipes, produce explosive
mixtures, or destroy the pipes or their joints shall be_allowed to
enter the house-drainage system.
16. Refrigerators, fixtures, or receptacles for storing food,
or .storing or dispensing water used for drinking, culinary surgical
or other purposes for which a pure water supply is imperative s
not be connected directly with the drainage system.
17. No water-closet shall be located in a room or compartment
which is not properly lighted and ventilated to the outer air.
18. If water-closets or other plumbing fixtures exist in build-
Inge where there is no sewer available, 'suitable provision shall b
ade for disposing of the house sewage b some°method of sewage
treatment and disposal approved by the State:Department of _Health,
190 Where a house-drainage system may be subjected to back
low of sewage, suitable provision shall be made to preventits
overflow In the building.
20 Plumbing systems shall be maintained'"in a sanitary eon
ition
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