This easy-to-install end cap works with multiple plumbing materials including copper, CPVC and PEX. Simply connect the fitting to your tubing - no tools or inserts needed. Use it for both hot and cold water applications. The O-ring guide ensures a leak-proof seal while the outside connection maintains high flow capacity. Even under pressure, the tubing can swivel for dynamic applications. The stainless steel gripper ring interlocks corrosion-resistantly with various materials without tools, ensuring a connection you can trust.