All horizontal piping shall be run in practical
alignment and at a uniform grade of not less than 1/4 inch per foot
and shall be supported or anchored at intervals of not more than eight
feet for cast-iron pipe and not more than 10 feet for other pipes.
All stacks shall be supported at their bases,
and all pipes shall be rigidly secured.
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 manholes at least 24
inches square inside or 30 inches inside diameter, with proper covers.
[Amended 9-7-1994 by L.L. No. 26-1994]
Excavations or street openings necessary for
sewer connections or installing house sewers and water service pipes
shall be made in accordance with the regulations of the Town Commissioner
of the Department of Public Works and the regulations applicable thereto.
In buildings or establishments where more than
one water closet is required, except for the accommodation of families,
separate water closets and toilets and toilet rooms shall be provided
for both sexes.
All plumbing fixtures shall be provided with
a sufficient supply of water for flushing to keep them in a sanitary
condition.
No water service pipe shall be less than seven
feet distant from any part of the sewage disposal system and not less
than four feet below grade.
A water supply well shall be located not less
than 35 feet from a cesspool.
Cross connection between a public and private
water supply system shall be prohibited unless approved by the Suffolk
County Department of Health.
Direct water supply piping connections to sterilizers
are prohibited.
Water supply connections to aspirators, water
siphons or similar apparatus shall be equipped with an approved vacuum
breaker and check valve, the check valve to be located between the
fixture and the vacuum breaker.
Water supply connections to bidets, bedpan washers
or similar apparatus shall be equipped with an approved vacuum breaker
and check valve, the latter located between the fixture and the vacuum
breaker.
Water supply inlets to roof or suction tanks
shall be located at least two inches above the overflow level of the
tank.
Direct water connection to a refrigeration unit
for cooling purposes shall be equipped with an approved check valve
to prevent possible backflow of ammonia or other refrigerant agency
from defective condenser coils or jackets, except in such installations
where the water supply piping is entirely outside of the piping or
tank containing the refrigerant and two independent wall thicknesses
of metal separate the refrigerant from the public water supply system.
Refrigeration units containing more than 20 pounds of refrigerant
shall be provided with an additional safeguard in the form of an approved
relief valve installed at the outlet side of the check valve, such
relief valve being set at five pounds above the maximum water pressure
at the point of installation.