This Polyphenylsulfone ASTM PPSU F1960 tee is used to make a three way connection between WaterPEXa tubing. This 1 inch F1960 by 3/4 inch F1960 by 3/4 inch F1960 branch tee must be joined to the WaterPEXa tubing using a F1960 PEX sleeve to form a fast, reliable, and permanent seal. It is recommended that a specialized tool be used to make the connection.