Refrigerator waste pipes shall be of galvanized iron and be not less than 1 1/2 inches in diameter, with branches not less than 1 1/4 inches with strainers over each inlet. Refrigerator waste pipes shall not be trapped, but shall discharge over a water-supplied, properly trapped and vented sink, the top of which sink shall not be over four feet above the floor.
The indirect waste line, if over 20 feet in length, shall continue to and through the roof, and in no case shall it be open within six feet of an open soil or vent pipe. The size of pipe, where passing through the roof, shall be the size of the waste line carried through the building.
No plumbing fixtures, except drinking fountains, soda fountains or bar sinks, shall be installed with an indirect waste to the plumbing system. The waste of drinking fountains, soda fountains and bar sinks may be connected directly to the plumbing system when installed in the same manner as required for other plumbing fixtures, or they may be installed with an indirect waste with discharge open-end over a properly water-supplied, trapped and vented sink. In either case the branch waste to each such fixture shall be at least 1 1/2 inches in diameter with a one-and-one-half-inch trap.
The waste line in either case shall extend through the roof. Branches on indirect waste lines 15 feet or more in length shall be continued to the roof.
When one or two such fixtures are discharged into waste line, said line shall be at least 1 1/2 inches' internal diameter, and when more than two fountains, such line shall be two inches.
Expansion tank overflow or discharge from vacuum machines shall be exhausted openly on the roof system.
A gas machine waste may be connected directly with a drain, soil or waste pipe connecting with the sewer, provided that the same is properly trapped and vented.
No sediment pipe from house boilers shall be connected directly into any part of the plumbing drainage system.
No steam exhaust, boiler blowoff or drip pipe shall be connected with the house drain on the inside of any building. Such pipes shall first discharge into a proper condensing tank, and from this a proper outlet to the house sewer outside of the building shall be provided. In low-pressure steam system, the condensing tank may be omitted but the waste connection shall be otherwise as above mentioned.
The waste pipe for dental cuspidors shall be 1 1/2 inches for not more than three connections. When more than three cuspidors are connected on separate waste line, such line shall be increased to two inches. Each cuspidor shall be separately trapped by a trap at least 1 1/2 inches in diameter, properly vented and placed as close to the fixture as possible. Waste from dental cuspidors may discharge over sink.
[Amended 8-12-1974 by L.L. No. 7-1974]
A garage or other structure for the housing, sale or repair of automobiles which is provided with a water supply of either a temporary or permanent character or in which automobiles are washed, cleaned or repaired shall be provided with proper means for draining the floors and repair pits in such manner that no drainage therefrom shall flow over any street, alley or paved approach. Such drains shall be so arranged as to intercept all oil, gasoline or other flammable fluids as well as sand, silt and other solids for the purpose of excluding same from the sewer system.
They shall be provided with a sealed inlet opening not less than three inches in diameter and a ventilating pipe of not less than three inches in diameter and carried up above as the highest part of the roof and subject to the same conditions as required for roof outlets of soil or waste pipes.
The material for vent pipe must be the same as required for house drains when below ground and for soil and waste vents when above ground.
Such drains shall have the accumulated oils and other flammable fluids pumped or otherwise removed therefrom at regular intervals and shall be so maintained as to ensure the exclusion of the same from the sewer system.
They shall also be kept free of sand, silt and other solids and shall be subject to a periodical inspection.
Every building hereafter constructed or converted into a place of business where gasoline, benzine, naphtha or other flammable oils or compounds are used and existing buildings where such business is carried on shall be provided with a special drain the same as that required above for garages. A washbasin in a garage may discharge into the catch basin vent pipe. Such catch basins shall be substantially constructed as tight cesspools and may be of cast iron, concrete, concrete block or brick or steel-tank type.
Definition. "Tight cesspools" are defined as a closed block catch basin which is constructed to be nonporous.
All air conditioner condensate water shall not be directly discharged into the sanitary sewer system unless approved by county authorities.