(1)
Drilled and tapped joints shall not be made in a sanitary drainage pipe or vent pipe and fittings unless suitable provision has been made for drilling and tapping.
(2)
A copper water distributing pipe of NPS 1 or larger may be mechanically swaged to permit the joining of other copper pipe of equal size.
(3)
A drainage pipe or fitting may be drilled or tapped
(a)
to provide for the connection of a trap seal primer line,
(b)
to connect a device designed to dispense germicidal or odour control chemicals or trap seal water to a floor drain downstream of a vacuum breaker or flush valve in a flush tube connected to a sanitary unit,
(c)
to provide a hole for a branch connection to a drainage pipe, where the branch connection is made with a saddle hub as permitted by Article 7.2.10.5. and where the hole is drilled to provide a smooth clean hole of the required size and orientation, or
(d)
to provide for the connection of pipe or fittings to metal or rigid plastic pipe and fittings where the pipe or fittings are thick enough to be threaded or are bossed for tapping.
(4)
No pipe adaption shall be made by the use of a bushing that leaves a square edge or shoulder on the inside of the pipe or fitting.