The SharkBite PEX Swivel Adapter is an easy to install solution to connect PEX tubing to a male threaded connection. These fittings are suitable for potable water distribution and hydronic heating applications. SharkBite PEX Barb fittings can be used in both a stainless steel clamp system, or a copper crimp ring system as well (each sold separately). Approvals: ASTM F1807, NSF/ANSI 61, NSF 372.