T and Cross Pipe 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, O. Reg. 332/12: BUILDING CODE (ontario.ca) © Queen’s Printer for Ontario, 2021