All joints and connections shall be made gaslight and watertight. (See Article XVI, Inspections and Tests.)
Joints in vitrified clay sewer pipe shall be firmly packed with oakum and shall be secured with hot-poured joints of asphaltic compound at least one inch deep in rooty ground or a good cement joint.
A.
Caulked joints for cast-iron bell-and-spigot soil pipe shall be firmly packed with oakum. Lead shall be run in one pouring and caulked tight. No paint, varnish or putty shall be permitted on jointing material until after the joint has been tested and approved.
B.
Lead joints for water supply piping shall conform to the rules and regulations of the authorities having jurisdiction.
All screwed joints shall be American Standard Taper Pipe Thread, ASA B2.1945. All burrs or cuttings shall be removed. All pipe ends shall be reamed and pipe joint cement will be permitted only on the male threads.
Wiped joints in lead pipe, or between lead pipe and brass or copper pipe, ferrules, solder nipples, bushings or traps, in all cases on the sewer side of the trap, shall be full wiped joints. It shall be unlawful to use overcastor cup joints.
All soldered joints for tube shall be made with standard fittings. The joints shall be properly fluxed and made with approved solder.
In drainage piping, slip joints, other than expansion joints, may be used only in waste pipe between the trap seal and the fixture.
The connection between drainage pipes and water closets, floor outlet service sinks, pedestal urinals and hard lead or iron flanges shall be caulked, soldered or screwed to the drainage piping. The connection shall be bolted to the earthenware by means of brass bolts with an approved gasket, washer or setting compound between the earthenware and the connection. The floor flange shall be set on an approved, firm base.
All concealed joints for water tube within building shall be soldered or sweat joints.
Where different sizes of pipe or pipes are to be connected, proper-size increaser or reducer, pitched at an angle of 45º between the sizes, shall be used.
It shall be unlawful to do any welding on any part of the ventilating, drainage or plumbing system.
Any fitting or connection which has enlargement or recess with a ledge, shoulder or reduction of the pipe area in the direction of the flow on the outlet or drain side of any trap is prohibited.
Where pipes pass through a roof, the joints shall be made watertight by the use of copper or lead flashings, and in the case of a tin or galvanized roof, the flashing shall be soldered to the roof.