Push x Push Slip Coupling is the easiest plumbing fitting to join any combination of Copper, PEX, CPVC, pipe together. The perfect solutions for pipe fitting repairs. Only 1 end of the coupling has a stop, Allowing the other end to slide freely over the end of a pipeIts as simple as inserting the pipe into the fitting deep enough to be sealed by our specially-formulated O-ring, Coupling is removable and reusable installation. Once inserted, the stainless steel teeth bite down and grip the pipe. This push-to-connect fitting is designed for potable water and radiant heating (including underground or behind-the-wall) applications with no access panels required. Color: Brass.