Maybe I'm missing something on the water heater...

Msu, there may be another quick way to check if you have a propane/electric water heater. Look in you electric power center and see if you have a circuit breaker labeled WH or water heater. As said, these draw 1400 watts and should be on a separate breaker. If so, just turn it off and you can run the WH on propane when you need hot water. This will keep you from tripping the house breaker if you turn on a high current appliance and the WH is in a heating cycle.

Ken