... -pvc rigid drainage/u-pvc water-proof pipe 2,Material :U-PVC 3,ISO,IEC,GB Standard 5,Size:16mm-200mm Discription:PVC drainage pipe,water ... extinguishingF.Low coefficient of linear expansion of , thermal expansion of pvc-u pipe is less than polyolefin by , low thermal conductivity ... be adopted, easy to handle and install.Photos White rigid pvc water perforated plastic U-PVC hdpe perforated drainage pipe