This section is from the book "The Building Trades Pocketbook", by International Correspondence Schools. Also available from Amazon: Building Trades Pocketbook: a Handy Manual of reference on Building Construction.
These pipes come in 5' lengths and are known as extra heavy. The maker's name should preferably be cast on each piece. Any pipes lighter than the following should be rejected.
Weight per Foot.
Weight per Foot, Pounds.
Cast-iron soil-pipe fittings should correspond with the grade of pipes used. They should have easy curves. No sharp 90° bends or T branches should be used; only obtuse angle fittings. Fittings are made as staple goods at the following angles: 90°, 45°, 22 1/2°, 11 1/4°, and are known as quarter, eighth, sixteenth, and thirty-second fittings, respectively.
Cast-iron soil-pipe joints are made with picked oakum and molten lead calked solidly home in the sockets; 12 oz. of soft pig lead must be used in each joint for each inch in diameter of the pipe.
When used for drainage purposes these should be stamped with the maker's name. They should be galvanized and conform to the following table:
Thickness of Metal. Inches.
Weight per Foot. Pounds.
Fittings for vent pipes on wrought-iron or steel pipes may be the ordinary cast or malleable steam and water fittings.
Fittings for waste or soil pipes must be the special, extra-heavy cast-iron, recessed and threaded, drainage fittings, with smooth interior waterway and threads tapped, so as to give a uniform grade to branches of not less than 1/4 in. per ft.
All joints must be screwed joints made up with red lead, and the burr formed in cutting must be carefully reamed out. When the male threads are screwed up tightly, the ends should abut each other in the couplings.
Short nipples on wrought-iron or steel pipe, where the unthreaded pipe is less than 1 1/2 in. long, should be of the thick-ness and weight known as extra heavy or extra strong.
These should be thoroughly annealed, seamless drawn, brass tubing of standard iron-pipe gauge. Connections on brass pipe and between brass pipe and traps or iron pipe must not be made with slip joints or couplings. Threaded connections on brass pipe should be tapered and of the same size as iron-pipe threads. The following average thicknesses and weights per lineal foot should be employed: