These PEX GUY 1/2″ PEX x 1/2″ PEX Angled Shut Off/Stop Valve with 1/4 Turn Stop can be used as a shut off between two lines of 1/2″ PEX piping at a 90 degree angle. The PEX sides are crimp/barbs type assembly. Since these shut offs are made from Lead-Free materials, they are suitable for a variety of applications from domestic drinking water to radiant heating.