Hubless cast iron soil fittings produced by centrifugal technology are mainly used in drainpipe through a flexible linkage.The product has totally get the standards,ASTM A888,CISPI301,and has the following advantages:flat and straight,even pipe wall,high strength and density,high smoothness on the inner and outer surface of the wall,no defects in foundry,easy installation,easy maintain,long life,helpful to environment,fireproof and no noise.