T and Cross Fittings

(1)  A T fitting shall not be used in a drainage system except to connect a vent pipe.

(2)  A cross fitting shall not be used in a drainage system.

Article 7.2.4.1. Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.

Note : Sanitary T – A sanitary tee is a plumbing fixture that allows liquids to drain while also allowing the plumbing system to vent.