... with plastic(PVC) pipes, cast iron pipe is more soild and durable. Furthemore, cast iron pipe has excellent noise suppression and fire ... bends, single branches, double branches, corner branches, unequal branches, down pipe support, spigot caps, reducer, traps, access pieces with circle door ... ) Couplings. 301 seriesMaterial: Stainless steel. Packing: Cartons. cast iron waste water pipe