... sanitary Drain, Waste, and Vent, sewer drainage applications. Compared with plastic(PVC) pipes, cast iron pipe is more soild and durable. Furthemore, ... molds mainly include: Bends, double bends, single branches, double branches, corner branches, unequal branches, down pipe support, spigot caps, reducer, traps, ... .3) Couplings. 301 seriesMaterial: Stainless steel. Packing: Cartons. iron drainage pipe