withdrawn
It's electric, and they always turn the hot water tank off when they leave. Currently it does have to be turned off at the panel (which is conveniently located behind the fridge lol), but I'm going to put a 30 amp DP switch in the bathroom for them.It is a good idea to turn off the water tank (gas or electric) whenever the water is turned off. This way if something odd happens in the water system so as to siphon all the water out of the tank the tank doesn't self destruct by running empty.
So this 3 way switch setup could be overkill as your parents would need to go to the breaker panel anyway.
It's a water heater (aka hot water tank - or perhaps I'm using the wrong terminology here?).Is it a water tank or a water heater?
They are (I just misunderstood AllanJ's post if your commenting on my unedited reply to him).The water heater and the water pump should be two completely separate circuits.