The Ontario Building Code | Wiped Joints
220.127.116.11. Wiped Joints
(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.