Mueller 164-638 PVC Schedule 80 Solvent UnionsMueller 164-638 PVC Schedule 80 Solvent Unions Features:;Heavy-duty white Schedule 80 PVC construction;EPDM O-ring seal;Can be used with both Schedule 40 or 80 pipe;Solvent ends comply with ASTM D2466;Rated at 150 PSI at 73 º F;NSF approved;Slip x Slip;164-633: 1/2";164-634: 3/4";164-635: 1";* Image shown may vary by color, finish, or material