Every trap shall be self-cleaning. Traps shall
be of lead, brass, cast iron or of malleable iron, galvanized or porcelain
enameled inside. Galvanized or porcelain enameled traps shall be extra
heavy and shall have a full-bore smooth interior waterway with threads
tapped out of solid metal. All traps must be placed as near the fixture
as practicable. All waste pipe must be provided with strong metallic
strainer. No lead traps shall be used on the waste of any bathtubs.
All bathtub traps shall be made of brass.
Traps must be placed as near the fixtures as
possible and in no case shall a trap be located more than two feet
from the fixture, if within the building. Each trap shall be ventilated,
either by a special vent pipe of suitable size extending to a point
at least two feet above the highest part of the roof of the house
or into a special pipe erected for ventilating purposes only, which
vent pipe must be connected below the lowest fixture into the soil
or waste pipe. This special ventilating pipe shall be no less than
two inches in diameter when used to vent four fixtures or less, no
more than one of which shall be a water closet. For each water closet
or other fixture thereafter added, the main ventilating pipe shall
be increased correspondingly in cross-sectional area. The highest
fixture in a building, if located within two feet of the main stack,
need not be vented. Mechanical traps may be used only where they are
shown to be necessary and then only upon approval of the Division
of Health.
Each fixture trap shall have a water seal of
not less than two inches and not more than four inches. When traps
are emptied of water to prevent freezing, they must be filled with
glycerin or oil so as to preserve a perfect seal.
Each trap, except those in combination with
fixtures in which the trap seal is plainly visible and accessible,
shall be provided with an accessible brass trap screw of ample size,
protected by the water seal.
All traps shall be set true with respect to
their water seals and shall be protected from frost and evaporation.
The bodies of cleanout ferrules shall be made
of standard pipe sizes, conform in thickness to that required for
pipe and fittings of the same metal and extend not less than 1/4 inch
above the hub. The cleanout cap or plug shall be of heavy brass not
less than 1/8 inch thick and be provided with raised nut or recessed
socket for removal.
A cleanout, easily accessible, shall be provided
at the foot of each vertical waste or soil stack. There shall be at
least two cleanouts in the house drain: one at or near the base of
the stack and the other, with full-size Y-branch, inside the wall
near the connection between the house drain and house sewer. Except
for the latter, cleanouts shall be of the same nominal size as the
pipes up to four inches and not less than four inches for larger pipes.
The distance between cleanouts in horizontal soil lines shall not
exceed 50 feet.
All underground traps and cleanouts of a building,
except where cleanouts are flush with the floor, and all exterior
underground traps shall be made accessible by brick or cement manholes
with iron or brass covers.
Any floor or wall connection of fixture traps,
when bolted or screwed to the floor or wall, shall be regarded as
a cleanout.
A.
No industrial or trade wastes containing more organic
matter than domestic sanitary sewage, chemicals, petroleum products
or any foreign material whatsoever, either in concentrated form or
diluted with water, which may detrimentally affect any public sanitary
sewer or the operation of any public disposal plant, shall be discharged
directly or indirectly into the house drain, the house sewer or the
sewer. Upon installation or provision of adequate and proper preliminary
treatment on the premises where said wastes originate, and upon written
application to the Division of Health, accompanied by the sum of $10
as a fee to defray the cost of the necessary inspections by the Plumbing
Inspector, a permit may be issued for the discharge of such treated
waste liquids for a period not to exceed one year, renewable at the
discretion of the Division upon the payment of said fee, but revocable
at any time upon proof of detrimental effect upon the sewerage system.
B.
No waste water from any building or structure containing amounts of oils or petroleum products or grease in suspension or emulsion in excess of those contained in domestic sanitary sewage shall be discharged directly or indirectly into the house drain, the house sewer or the sewer without first being passed through suitable approved grease- or oil-removal devices of a capacity adequate effectively to remove a substantial portion of such oils or greases. Wherever such removal devices are required, on written application to the Division of Health, accompanied by the sum of $10 as an inspection fee, a permit may be issued by the Division of Health in the same manner and under the same provisions and restrictions specified in Subsection A of this section.
C.
In connection with any floor drain in all public garages or stables where vehicles are washed, an approved mud or settling trap must be installed either separately or in connection with the removal devices referred to in Subsection B of this section, to prevent mud or grit from being carried into the house drain or the house sewer. Wherever such removal devices are required, on written application to the Division of Health, accompanied by the sum of $10 as an inspection fee, a permit may be issued by the Division of Health in the same manner and under the same provisions and restrictions specified in Subsection A of this section.
Backwater valves shall have all bearing parts
or balls of noncorrodible metal and so constructed as to ensure a
positive mechanical seal and remain closed except when discharging
wastes.
