The Ontario Building Code | Drilled and Tapped Joints
18.104.22.168. Drilled and Tapped Joints
(2) A water distributing pipe may be drilled or tapped to provide for a mechanically extracted T in copper tubing of Type L or K provided that all branch connections shall be notched and dimpled to limit depth of insertion and conform to the inner contour of the main.
(4) A drainage pipe or fitting may be drilled or tapped,
(a) to provide for the connection of atrap seal primer line,
(b) to connect a device designed to dispense germicidal or odour control chemicals or trapseal water to a floor drain downstream of a vacuum breakeror 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 22.214.171.124. and where the hole is drilled to provide a smooth clean hole of the required size and orientation, or