... type cast iron pipe fittings for drainage GB/T12772-2008cast iron drainage pipe and fittings, soil pipes, ... a74, bs 437Hubless/socketless Cast Iron Soil/drainage Pipes and fittings has long been employed by ... the building industry as a reliable drainage system, widely used in sanitary Drain, Waste ... , it has become architects' first choice for drainage inside the building.1) For no-hub pipe ...