Slip Coupling 1.cUPC,ACS ,NSF,PATENT approved 2,Market: ... 3,1/2" 3/4" Lead free DZR Slip Coupling : Sharkbite Fittings; Push-Fit Fittings; Quick Fittings;Brass Fittings ... Coupling: --LinboBite Coupling 1, Made of brass CW602N; CW617N;CW614N;C37700;C84400; Hbp58;Hpb57;Hpb59;Lead free brass... 2,Installation ... 50 years Email: carola @ zjlinbocopper.cn Slip Coupling(cUPC,ACS ,NSF PATENT approved)