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.
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.