House service pipes must be connected to the street main by means of taps, the size of which shall be determined by the Plumbing Inspector. All service mains shall be made of copper, brass or AAA lead. Each service main shall be equipped with an inverted stop, and the waste and curb box shall be set in place on the inside edge of the sidewalk where directed by the Building Department before the tap is made. All service mains shall be laid to a minimum depth of four feet six inches. All water service lines and connections to the street main shall be made by a licensed plumber.
Water service main sizes shall be determined by the Plumbing Inspector, the minimum size to be three-fourths-inch AAA lead, brass or copper. Iron pipe size shall be as follows and, when flushometers are used, minimum tap meter and water service pipe shall be not less than one inch: Copper service shall be Type K, seamless drawn and semiannealed and shall be free from surface defects inside and outside clean and of uniform color and quality and true to gauge.
Each water service line shall be equipped with a globe valve located between the building wall and the meter and with a globe valve on the outlet side of the meter.
All work and material shall be inspected and approved by the Plumbing Inspector before being covered.
Water connections, meters and water for building purposes shall comply with existing agreements with the water supply company. Where meter pits are required, they shall be built of masonry four feet square and fitted with a twenty-four-inch iron manhole frame and cover.
A.
All water closets and other plumbing fixtures must be provided with a sufficient supply of water for flushing to keep them in a proper and cleanly condition. All supply piping ends must be reamed to the full area.
B.
Flush tanks must have a capacity of eight gallons of water closets and five gallons for urinals.
C.
All hot-water storage tanks and heaters shall have installed a relief valve with a drain run to a trapped fixture or dry well as approved by the Plumbing Inspector.
A.
The diameter of all riser lines in plumbing systems shall be not less than 3/4 inch. No supply pipes shall be installed in outside walls unless absolutely necessary, in which event there shall be an insulation of two-inch rock wool between pipes and outside wall.
B.
Separate valves, so located as to be accessible at all times, shall be placed at the foot of each riser line, and, in dwellings or apartments for occupation of more than one family, each group of fixtures shall have additional valves.
C.
Diameters of branches to any fixtures must not be less than 1/2 inch, except that when used to supply water closets, cisterns or lavatories, and the material used is lead, brass or copper pipe, the minimum diameter may be 3/8 inch. Branches for flush valves for water closets must not be less than one inch in diameter and, for urinals, not less than 1/2 inch in diameter.
D.
Where a hot-water supply system is installed, the distance between the hot- and cold-water risers should not be less than eight inches. Where it is impossible to place them eight inches or more apart, the hot-water riser must be covered with an approved insulating material and a method of circulation provided that will ensure a prompt delivery of hot water at the faucet when required.
E.
All risers and branches must be properly fastened.
A.
When the water pressure is not sufficient to supply freely and continuously all fixtures, a house supply tank must be provided of sufficient size to afford an ample supply of water to all fixtures at all times. Such tanks must be supplied from the pressure or by power pumps, as may be necessary; when from the pressure, ball cocks must be provided.
B.
House supply tanks must be metal covered so as to exclude dust and so located as to prevent water contamination by gas and odors from plumbing fixtures.
C.
House supply tanks must be of wood or iron or of wood lined with tinned and planished copper.
D.
House tanks must be supported on iron beams.
E.
The overflow pipe should discharge upon the roof, where possible, and in such cases should be brought down to within six inches of the roof, or it must be trapped and discharged over an open and water-supplied sink not in the same room nor over 3 1/2 feet above the floor. In no case shall the overflow be connected with any part of the plumbing system.
Emptying pipes for such tanks must be provided and be discharged in the manner required for the overflow pipes and may be branched into overflow pipes. Emptying pipes for tanks containing more than 500 gallons must be four inches in diameter and provided with a valve of the same size fitted with a wheel or lever handle.