As we were fond of telling our rental customers, there are 4 appliances that are on fire and only one is safe to have on while going down the road – Well the RV Water Heater is NOT one of them! The water heater must be OFF while the vehicle is in motion – including the pilot light (if applicable); and
all pilot lights or LP gas appliance must be off when filling the gasoline or LP gas
There are two ways to heat the water in the water heaters: Propane (LP) or Electric. Some RV’s are LP only, some electric only, but most are dual system of LP or Electric depending on your camping circumstances.
Original Youtube video here: Searching For A Used Water Heater For RV’s