Push Fittings and PushLock fittings connect PEX, PVC & Copper in any combination. Fittings are comparable to Sharkbite fittings. These instant Push-Fit Connection increase ease-of-use and are made with Lead Free - Forged Brass and Pre-Lubricated for Quick installation. There are no tools, heat, glue, solder or flux required. EPDM O-Ring for Leak free Seals.