... ,non-toxic,higher flow capacity,long life,environmental 1.Raw material:PVC-U,Filler,Lubricants,Stabilizer2.Features: a)Light weight: weight in ... , prevents scum buildup. The water pressure and discharge of PVC-U pipe is 30% lower than cast pipes in the same ... )Low cost: with lower cost of installation, transportation and raw material, the total cost of the whole engineering makes the cost ...