3/8" Male Compression × 3/8" Female Compression × 1/4" Tube

The John Guest angle stop valve makes it possible to connect your water ionizer to your cold-water source without piercing the water line. Simply shut off your cold water valve to your faucet, disconnect the 3/8" compression fitting and install the valve in between the line going up to your faucet and the water source. Once it is installed simply insert your 1/4" tubing into the female connection and go from there. Great for people renting, you can take the fitting with you when you leave and there is no trace it was ever there.