... 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 ... , spigot caps, reducer, traps, access pieces with circle door, access pipeces with rectangular door, access pieces with manual door, etc.Surface ...