pvc pipe: 1.raw material:u-pvc 2.size:1/2",3/4",1",2",3",4",6",8",10",12",14' 3.use:for waste water ----pvc pipe fitting 1.Will not carry electricity.2.Contains special additives so that they can bear pressure and can be buried in concrete.3.Free from aging and color changing.4.As soon as departing from the fire, the fire on them dies out immediately.5.In the fire, their electric relaying ability ...