... material:u-pvc 2.size:1/2",3/4",1",2",3",4",6",8",10",12",14' 3.use:for waste water ---- ... be buried in concrete.3.Free from aging and color changing.4.As soon as departing from the fire, the fire on ... , their electric relaying ability is twice as much as that of steel pipes.6.Uses special additives to give off flavor ...