... type cast iron pipe fittings for drainage GB/T12772-2008cast iron drainage pipe and fittings, soil pipes, cip, pipe fittings, coupling ... , astm a888, en877, astm a74, bs 437Hubless/socketless Cast Iron Soil/drainage ... , and Vent, sewer drainage applications. Compared with plastic(PVC) pipes, cast iron pipe is more durable. Furthemore ...