To adjust the temperature on your water heater?
The images show how to adjust the temperature on both style control valves. The images show the 120 degree mark and a residential water heater should not be adjusted above 120 degrees on account of scalding. If your heater is adjusted at or above 120 and your showers are not hot, the shower valve temperature may need to be adjusted.
The images show the 120 degree mark and a residential water heater should not be adjusted above 120 degrees on account of scalding.