RV 3-Way Valve, Water Heater By-Pass, 1/2"

 Water heater by-pass valve. Three Way Valve 1\2" x 1\2" x 1\2" This will work on PEX and Polybutylene Pipe. You will use this to bypass your water heater son you can pump antiffeeze into the plumbing system without getting it in your water heater.