1/2" PVC Solvent Weld Adjustable Repair Coupling, Expands From 6-3/4" To 8-1/2", Heavy Duty PVC With Double O-Ring Buna-n Seal, Rated At 160 PSI At 73 Degrees Fahrenheit, For Use In New Or Existing Pipe Lines, Complies With ASTM D1784 & D2466.