dougrainer wrote:
Bill.Satellite wrote:
It it were the mixing valve, wouldn't he get the same effect whether connected to city water or using water pumps?
IF you have a On Demand RV water heater, you will get wide variations of Hot and Cold when on water pump versus City water. IF the pump cycles at all when you have a On Demand, the Water heater will turn on and off due to that pressure/volume fluctuation. Same principle with the EXT mixing valve. Especially when the mixing valve is clogged and bad. Doug
This isn't an on demand water heater. It has a 10 gallon tank that operates at a higher temperature than a normal 10 gal only unit. The mixing valve lowers the temperature and adds volume. When you done and exhausted all 16 gallons you have no more hot water. An on demand unit will supply unlimited hot water as long as you have fuel and water. In a true boiler system they call this a tempering valve.
If this fellows mixer was bad as in block or restricted he would just have to add a lot of cold water at the faucet. Also if it was blocked or restricted it would be a constant not something that comes and goes.