PVC coupler Material:PVC Standard:GB,ISO Advantages:High flow capacity, endurable, nontoxic, pressure proof, facilitating ins PVC coupler Sizes: 50mm, 75mm ... , 110mm, 160mm Main charactricstics1. PVC-U is a rigid unplasticized ... , suitable for sewerage and industrial effluent disposal4. PVC-U is a combustion-proof material of grade ...