UNION CONNECTOR: The John Guest push-to-connect reducing union connector is designed to connect copper or plastic tubings NO TOOLS REQUIRED: Push-to-connect fittings provide a simple, quick, reliable, and leak-free connection with no tools required DESIGN: This push-to-connect fitting is equipped with EPDM O-rings that utilize John Guest's push-fit technology to make easy, reliable, and leak-free connections DURABLE: This reducer is made with durable white polypropylene that provides excellent protection against chemicals SAFETY: These plumbing fittings are manufactured with FDA-compliant material and are NSF 61 and 51 certified