... drainage GB/T12772-2008cast iron drainage pipe and fittings, soil pipes, cip, pipe fittings, coupling, astm a888, en877, astm a74, ... system, widely used in sanitary Drain, Waste, and Vent, sewer drainage applications. Compared with plastic(PVC) pipes, cast iron ... standardsMaterial: 300 series Stainless steel and EPDM rubber.Packing: Cartons. B type cast iron pipe fittings for drainage GB/T12772-2008