This is a Everflow Supplies reducing tee with a lead free brass construction, with pex barb connections of 1 Inch X 3/4 Inch X 1/2 Inch in diameter. In particular, the fitting is approved by upc and conforms to the nsf/ansi 61-g standard. This PEX 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. This Barb Bullnose Tee is an easy to install, low cost solution to connect PEX Tubing. These Brass PEX Tees can be used in any potable / drinking water and radiant heating types of application. This tee fitting is suitable and approved for any domestic water uses.