Slip Coupling 1.cUPC,ACS ,NSF,PATENT approved 2,Market: USA & Canada Europen country 3,1/2" 3/4" Lead free DZR Slip Coupling : Sharkbite ... plumbing joint.Easy to disconnect if needed. Introduction of Slip Coupling: --LinboBite Coupling 1, Made of brass CW602N; CW617N;CW614N;C37700;C84400 ... 7,Quality gurantee 50 years Email: carola @ zjlinbocopper.cn Slip Coupling(cUPC,ACS ,NSF PATENT approved)