pvc pipe & fittings for drainage,pvc irrigating pipe , pvc chemical pipe, pvc watersupply pipe,pvc electricity pipe pvc pipe and fittings Classification:1.UPVC-U solid-wall drainage pipe2. UPVC-U drainage pipe with inner spiralPVC-U characteristics of solid-walled drainage pipe1. Uniform wall thickness,stable sizes2. Smooth pipe wall, low liquid resistance, high transfer efficiency3. No blocking, ...