This lead free CrimpRing (TM) tee is used to make a three way connection between potable or radiant heating PEX tubing. This 3/4 crimp x 3/4 crimp x 3/4 crimp branch tee is made of lead free brass and must be joined to the PEX tubing using a copper crimp ring to form a fast, reliable, and permanent seal. It is recommended to use an electric crimp tool to make the crimp connection.