... B B type cast iron pipe fittings for drainage GB/T12772-2008cast iron drainage pipe and fittings, soil pipes, cip, pipe fittings, coupling, astm a888, en877 ... widely used in sanitary Drain, Waste, and Vent, sewer drainage applications. Compared with plastic(PVC) pipes, cast iron pipe is more ... , such as BEND, DOUBLE BEND, WYE, DOUBLE WYE, SAN TEE, VENT TRAP, etc.Surface finish: Anti-rust paint or no ...