SewerRatz
Illinois Licensed Plumber
Rugged Thanks for the heads up on what that valve is. Like I said its the very first time I ever seen anything like that.In all the years and the 1000's of water heaters I replaced, never never seen that valve. Expansion tanks are required on all water heater installs in Illinois, before they only required it if there was a check valve on the inlet or if there was a backflow preventer at the meter.