The SharkBite PEX Poly Alloy Barb Tee is an easy to install, low-cost solution to connect to PEX tubing. The SharkBite PEX Poly Alloy Barb fittings are compatible for potable water distribution and hydronic heating applications. These fittings can be used in both a stainless steel clamp system, or a copper crimp ring system as well (each sold separately). Approvals: ASTM 2159, NSF/ANSI 61, NSF 372.WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to