The Ontario Building Code | Cast Iron Fittings for Asbestos-Cement Drainage Pipe
7.2.6.2. Cast Iron Fittings for Asbestos-cement Drainage pipe
(1) Cast iron fittings designed for use with asbestos-cement pipe for drainage purposes shall conform to the applicable requirements of,
(a) CAN/CSA-B127.1, "Asbestos cement Drain, Waste and vent Fittings", or
(b) CSA B127.2-M, "Components for Use in Asbestos cement Building Sewer Systems".