Supply Giant is the easiest plumbing fitting to join any combination of Copper, PEX, CPVC, pipe together. It features easy to disconnect and reconfigure the system with no soldering, clamps, unions or glue required, Its 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. It is rated up to 200 psi and 200°Fahrenheit. ⚠ California Proposition 65 Warning: This product is known to the state of California to cause cancer, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.