This section is from the book "Plumbing Plan and Specifications", by J. J. Cosgrove. Also available from Amazon: Plumbing plans and Inspection.
All joints in the cast-iron pipe shall be made water-tight with picked oakum and pure pig lead, well calked into the hubs. One pound of lead shall be used at each joint for each inch in diameter of the pipe.
A cleanout branch shall be provided in the house drain wherever indicated on the plans, and a cleanout plug shall be calked into such fittings. All cleanouts shall have iron bodies with brass screw plugs threaded with standard pipe threads, and shall have a square or hexagonal nut on the top at least 1 1/8 inches square and 1-inch high. The plugs, when finally screwed into the ferrule, shall be made up with graphite in the joints.
Cast-iron pipe which is buried in the ground shall have a firm bearing along its entire length on undisturbed earth. In case the trenches have been dug below the proper grades, the pipes shall be supported every 10 feet on bricks, firmly bedded on undisturbed earth. The vertical stack of soil, waste and vent pipes throughout the building shall be securely fastened to the walls and floors at each tier of beams by means of Netherland split-ring hangers. At the foot of each rising line of cast-iron pipe a brick or concrete foundation shall be provided for the stack to rest on.
There shall be furnished and set in the pump room and in the patio, where shown on the ground-floor plan, a 3-inch Mueller floor drain and backwater trap combined, properly connected to the house drain.
Connections between lead pipe and cast-iron pipe shall be made by means of brass ferrules and wiped-solder joints. The ferrules shall be bell shaped, at least 1/8-inch thick, 4 inches long, and shall be securely calked into the hubs of the cast-iron pipe or fittings.
All connections to the horizontal house drain shall be made by means of Y fittings, and changes in the direction of the pipe shall be made with 1/6, 1/8 or long-sweep 1/4 bends. On the vertical stack, connection may be made with TY branches. T branches will be permitted only on vent pipes.
Each fixture in the building shall be separately trapped with a 1/2-S syphon trap placed as close as possible to the fixture. All traps, with the exception of the water-closet traps, shall be vented by special l 1/2-inch vent pipes connected to the trap near the crown and the other end connected to a vent stack extending through the roof, or connecting to the soil stack above the highest fix-ture. Each water-closet shall be vented through a 2-inch pipe connecting the lead bend below the floor to the vent stack. The vent pipe for each group of fixtures shall be connected to the vent stack at a point above the outlet of the highest fixture in the group. The group of sinks in the kitchen shall be provided with one Tucker, size 3, painted, cast-iron, water-cooled grease trap, properly connected to the waste pipe, and the chilling chamber connected to the cold water supply to the sinks.