Elkhart Products 10169968 CopperBite Lead-Free 3/4-Inch Push-Fit Tube Cap 3/4-Inch push-fit tube cap. Copper body construction, Lead-free design Works with Copper, CPVC, and PEX tubing. Quick and easy push-fit technology. No special installation tools required EPDM rubber O-ring seal, nylon guide ring, and 316 stainless steel grab ring. Removable and reusable fittings. Pre-lubricated for fast installation Meets ASME B16.22 and B16.18 dimensional standards. Fittings surpass rigorous mechanical and health effects performance requirements, including ASSE 1061, ANSI/NSF 61-G, and ANSI/NSF 14 Meets or exceeds current low-lead/no-lead state requirements. Can be used in underground applications. No wire brush, flux, solder, flame, tarnish, or solder buildup