... :High flow capacity, endurable, nontoxic, pressure proof, facilitating ins PVC coupler Sizes: 50mm, 75mm, 110mm, 160mm Main charactricstics1 ... as well as high compressive rating and pipe safety factor2. PVC-U has good aging resistance with normal lifetime up to ... alkalis, salts resistance, suitable for sewerage and industrial effluent disposal4. PVC-U is a combustion-proof material of grade B2 with ...