These PEX GUY 1/2″ x 1/2″ x 3/4″ PEX Brass Crimp Tee can be used as a connection between one piece of 3/4″ PEX piping and two pieces of 1/2″ PEX piping. Since these brass tees are made from Lead-Free brass, they are suitable for a variety of applications from domestic drinking water to radiant heating.