The Ontario Building Code | Wiped Joints
7.3.2.2. Wiped Joints
(1) Wiped joints shall not be used except for sheet lead or lead pipe, or between such pipe and copper pipe or a ferrule.
(2) Every wiped joint in straight pipe shall,
(a) be made of solder,
(b) have an exposed surface on each side of the joint at least 19 mm wide, and
(c) be at least 10 mm thick at the thickest part.
(3) Every wiped flanged joint shall be reinforced with a lead flange that is at least 19 mm wide.
In Plain Language
Wiped joints, a traditional way of joining lead pipe, are restricted to sheet lead, lead pipe, and specific transitions to copper, with detailed requirements for how the joint is formed.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.