1. material: grey iron 2. strictly produced to EN877, ISO6594, ASTM A888 ... A888 , EN 877 etc, Hubless Cast Iron Soil Pipes has been widely used in the building industry as a reliable ... drainage system for a long time, it can be used in sanitary Drain, Waste, and Vent, sewer drainage ... plastic(PVC) pipes, cast iron pipe is more soild and durable. Furthemore, cast iron pipe has excellent noise suppression ...