... a long time, it can be used in sanitary Drain, Waste, and Vent, sewer drainage applications. Compared with plastic(PVC) pipes ... bends, single branches, double branches, corner branches, unequal branches, down pipe support, spigot caps, reducer, traps, access pieces with circle door ... .3) Couplings. 301 seriesMaterial: Stainless steel. Packing: Cartons. cast iron waste water pipe