Kohler 78913 Thermostatic Valve Cartridge Service

We cover the removal, evaluation for repair and replacement. The valve is identified by its physical attributes. It may have a tag EF F01 The one removed did not have any part number of branded markings. The thermostatic valve cartridge does NOT turn the water on and off. What you turn it the balance of hot / cold water changes. The water is normally turned on and off at a know that controls each shower head. We have some fun cutting the old valve in two to see how it works and what the options are for repair.