Sec. 18. Joints on Soil and Waste Pipes. - Connection on lead and cast-iron pipe shall be made with brass sleeve or ferrule, of the same size as the lead pipe inserted in the hub of the iron pipe, and caulked with lead. The lead must be attached to the ferrule by means of a wiped joint. Joints between lead and wrought-iron pipes must be made with brass nipple, of same size as lead pipe. The lead pipe must be attached to the brass nipple by means of a wiped joint. All connections of lead waste pipes must be made by means of wiped joints.

Short nipples on wrought-iron and steel pipes must be of thickness and weight known as "extra heavy" or "extra strong."

Brass ferrules must be best quality, extra heavy cast brass, not less than 4 inches long and 21⁄4, 31⁄2 and 41⁄2 inches in diameter and not less than the following weights:

DiametersWeights
21⁄4 inches.........................1 pound 0 ounce.
31⁄2 inches.........................1 pound 12 ounces.
41⁄2 inches.........................2 pounds 8 ounces.

Sec. 19. Solder Nipples. - Solder nipples must be heavy cast brass or of brass pipe, iron pipe size. When cast they must be not less than the following weights:

DiametersWeights
11⁄2 inches.........................0 pound 8 ounces.
2inches.........................0 pound 14 ounces.
21⁄2 inches.........................1 pound 6 ounces.
3inches.........................2 pounds 0 ounce.
4inches.........................3 pounds 8 ounces.

Sec. 20. Brass Clean-outs. - Brass screw caps for clean-outs must be extra heavy, not less than 1⁄8 inch thick. The screw cap must have a solid square or hexagonal nut not less than 1 inch high and a least diameter of 11⁄2 inches. The body of the clean-out ferrule must be at least equal in weight and thickness to the caulking ferrule for the same size pipe.

Sec. 21. Lead Waste Pipe. - All lead waste, soil vent and flush pipes must be of the best quality, known in commerce as "D," and of not less than the following weights per linear foot:

DiametersWeights
11⁄4 inches..............................21⁄2 pounds.
11⁄2 inches..............................3 pounds.
2inches..............................4 pounds.
3inches..............................6 pounds.
4inches..............................8 pounds.

All lead traps and bends must be of the same weight and thicknesses as their corresponding pipe branches.

Sec. 22. Roof Flashers. - Sheet lead for roof flashings must be 6-pound lead and must extend not less than 6 inches from the pipe and the joint made water-tight.

Sec. 23. Traps for Bath Tubs, Water Closets, Etc. - Every sink, bath tub, basin, water closet, slop hopper, or fixtures having a waste pipe, must be furnished with a trap, which shall be placed as close as practicable to the fixture that it serves and in no case shall it be more than 1 foot. The waste pipe from the bath tub or other fixtures must not be connected with a water-closet trap.

Sec. 24. Size of Horizontal and Vertical Waste Pipes, Traps and Branches. -

Horizontal and verticalNumber of small fixtures
11⁄4-inch..............................1
11⁄2-inch..............................2
2 -inch..............................3 to 8
21⁄2-inch..............................9 to 20
3 -inch..............................21 to 44

If building is ten (10) or more stories in height, the vertical waste pipe shall not be less than 3 inches in diameter. The use of wrought-iron pipe for waste pipe 2 inches or less in diameter is prohibited.

The size of traps and waste branches, for a given fixture, shall be as follows:

Kind of fixturesSize in inches
TrapBranch
Water closet...................................................34
Slop sink with trap combined..........................33
Slop sink ordinary...........................................22
Pedestal urinal................................................33
Floor drain or wash.........................................44
Yard drain or catch basin................................44
Urinal trough...................................................22
Laundry trays, two or five................................22
Combination sink and tray (for each fixture).....11⁄2 2
Kitchen sinks, small.........................................11⁄211⁄2
Kitchen sinks, large hotel, etc..........................
Kitchen sinks, grease trap...............................2
Pantry sinks....................................................11⁄211⁄2
Wash basin, one only......................................11⁄411⁄4
Bath tub..........................................................22
Shower baths..................................................11⁄211⁄2
Shower baths, floor.........................................22
Sitz bath..........................................................11⁄211⁄2
Drinking fountains............................................11⁄411⁄4

Sec. 25. Overflow Pipes. - Overflow pipes from fixtures must in all cases be connected on the inlet side of the traps.

Sec. 26. Setting of Traps Without Re-vent. - All traps must be substantially supported and set true with respect to their water levels. No pot, bottle or "D" trap will be permitted nor any form of trap that is not self-cleaning, nor that has interior chambers or mechanism nor any trap except earthenware ones that depend upon interior partitions for a seal. In case there is an additional fixture required in building and it is impossible to re-vent pipe for the trap, the building department may designate the kind of trap to be used. This shall not be construed to allow traps without re-vents in new buildings.

Sec. 27. Safe and Refrigerator Pipes. - Safe-waste pipes must not connect directly with any part of the plumbing system. Safe-waste pipes must discharge over an open, water-supplied, publicly-placed, ordinary-used sink, placed not more than 31⁄2 feet above the cellar floor. The safe waste from a refrigerator must be trapped at the bottom of the line only and must not discharge upon the ground floor, but over an ordinary open pan, or some properly-trapped, water-supplied sink, as above. In no case shall the refrigerator waste pipe discharge into a sink located in a living room.

The branches on vertical lines must be made by means of "Y" fittings and be carried to the safe with as much pitch as possible. Where there is an offset on the refrigerator waste pipe in the cellar, there must be clean-outs placed. These clean-outs must be of brass.

In tenement and lodging houses the refrigerator waste pipe must extend above the roof, and not be larger than 11⁄2 inches and the branches not smaller than 11⁄4 inches. Refrigerator waste pipes, except in tenement houses, and all safe-waste pipes, must have brass flap valve on the lower ends. Lead safes must be graded and neatly turned over beveled strips at their edges.

Sec. 28. Vent-pipe Material. - Material for vent pipes shall be of lead, brass, enameled iron or galvanized iron.

Sec. 29. Ventilation of Traps and Soil Lines. - Traps shall be protected from siphonage or air pressure by special vent pipes of a size of not less than the following tables:

Size of pipeMaximum
length in feet
Number of traps vented
MainsBranchMain vertical
11⁄4-inch vent..........20 feet1
11⁄2-inch vent..........40 feet2 or less
2-inch vent..............65 feet10 or less20 or less
21⁄2-inch vent..........100 feet20 or less40 or less
3-inch vent..............10 or more
stories
60 or less100 or less

The branch vent shall not be less than the following sizes:

  • 11⁄4 inches in diameter for 11⁄4 inch trap.
  • 11⁄2 inches in diameter for 11⁄2 inch to 21⁄2 inch trap.
  • 2 inches in diameter for 3 inch to 4 inch trap.
  • One-half their diameter, for traps 3 inches and over.

Where two or more closets are placed side by side, on a horizontal branch, the branch line shall have a relief extended as a loop. A pipe 2 inches in diameter shall be sufficient as a loop vent for two closets. A pipe 3 inches in diameter shall be sufficient as a relief for three or four closets; and where more than four closets are located on the same branch the relief shall not be less than 4 inches in diameter. All house drains and soil lines on which a water closet is located must have a 4-inch main vent line. Where an additional closet is located in the cellar or basement, and within 10 feet of main soil or vent line, no relief vent will be required for said closet; but where it is more than 10 feet, a 2-inch vent line will be required. Relief vent pipes for water closets must not be less than 2 inches in diameter, for a length of 40 feet, and not less than 3 inches in diameter, for more than 40 feet.