... drainage GB/T12772-2008cast iron drainage pipe and fittings, soil pipes, cip, pipe fittings, coupling, astm a888, en877, astm a74, ... bs 437Hubless/socketless Cast Iron Soil/drainage Pipes and fittings has long been employed by the building industry as ... mainly include: Bends, double bends, single branches, double branches, corner branches, unequal branches, down pipe support, spigot caps, reducer, ...