Coupling. Brass push fitting - no soldering, clamps, unions or glue required. UPC, IAPMO, and NSF-61 certified and approved. It is made of 1-piece DZR brass. The fitting can be used with copper, PEX, and CPVC, and is rated at 200 F (degree Fahrenheit), 200 psi. Designed for potable water and radiant heating. Fittings can be buried and placed behind drywall. Fittings are removeable (with a disconnect clip) and reuseable. Product is individually bagged.