Actually there is a benefit to cutting off the water pump when not using it.
It's true, the pump doesn't run except when needed to keep the system pressurized. When a faucet is turned on, the pressure in the system (many times 45 psi) drops causing the pump to begin working.
The same thing will happen if a leak develops in the water system. Leak begins, water pressure falls, pump starts pumping. If you're a sound sleeper or if you are away from the RV, the pump will continue to flood the area, until the fresh water tank is empty.
I always cut my pump off when it's not needed.
SpeakEasy wrote:
As to your question #4 - there is really no benefit in turning off the hot water or pump. The pump doesn't run except on demand (when you're drawing water). The water heater doesn't require electric for ongoing operation. You wouldn't want to start with a cold tank of water every time you needed hot water. It's best to keep it on and keep it hot for when you need it. It doesn't use very much propane to keep it hot.
-Speak