... type cast iron pipe fittings for drainage GB/T12772-2008cast iron drainage pipe and fittings, soil pipes, cip, pipe fittings, coupling, ... , astm a74, bs 437Hubless/socketless Cast Iron Soil/drainage Pipes and fittings has long been employed by the building industry ... sanitary Drain, Waste, and Vent, sewer drainage applications. Compared with plastic(PVC) pipes, cast iron pipe is more durable. Furthemore ...