Coupling. Brass push fitting. UPC, IAPMO, and NSF-61 certified and approved. The fitting can be used with copper, PEX, and CPVC, and is rated at 200 F (degree Fahrenheit)., 200 psi. It is made of 1-piece DZR brass. Fittings can be buried and placed behind drywall. Fittings are removeable and reuseable. Product is individually bagged.