Water pump switch question

If nothing goes wrong, it won't hurt anything as other have said. The two dangers are from leaks or a blown hose, or just running low on water. It may flood something, and when the water runs low the pump will suck air and run continuously. They get real hot after running a few hours, and your batteries won't like it either. One of the fancier water pumps has enough intelligence to stop if it has been running a few minutes continuously. That wouldn't be than hard to retrofit with a timer relay.

We only turn it off at night so as to not have it kick on for any reason and wake us up. So long as the pressure shutoff switch is working there is no downside to leaving it on except during subfreezing weather. In very cold weather I have had the water inside the pump freeze and would use it manually (switching it on and if still frozen immediately shutting it back off).

In theory the freezing would be less likely if I let the water trickle into the sink during the night but then the pump would be kicking on and off repeatedly.

I turn ours on when we set up to 'camp' and off when we're leaving - unless I forget.

I left it on once in our driveway a few days before our first trip. We had a plumbing connection with a slow leak at the water heater . As soon as enough water leaked out, the pump would kick on to build pressure to keep the leak supplied.
Put about a gallon of water on the floor of the wing behind our couch.

Our sink has a fold-down spigot and fold-down cover to convert it into 'counter top' when not in use. The design is bad: with the faucet lever turned towards "hot", when you fold the spigot down and close the lid, the lid turns the spigot on about halfway.

Yesterday my wife was cleaning up after dinner and did just this. She said she heard the pump running for a "long time" but thought I was running the outside shower.
The pump drained our fresh water tanks and filled our grey to overflowing before she realized something was wrong by the gurgling sound from water coming up in the bathroom floor drain.

We shut the pump off when traveling or when leaving the camper for extended periods of time. We don't shut it off every time we are done using the water.

I usually leave my water pump switch on all the time. I have only had one issue in all my years of camping. Something I had left on the counter slid and hit the faucet and turned it on. Luckily I didn't run out of water.

Bob in Calif.

I turn it off for two reasons a leak would pump all of the water out. Second that little light pulls about .02 amps, not much but it is some.

We always leave it on unless driving down the road.

Leave ours on 24/7 unless we are away from the rig.
If hooked up to shore water instead, I turn that off when we leave.

Leave it on all the time. Unless moving down the road.

As long as the switch works properly, and the tubing in the RV holds, there is no problem.
To me, this is similar to the hoses on the washing machine.....some folks turn the water off, when they go away for the day...just in case.

Turning the water pump off in the RV is just added insurance.....but, you aren't doing any damage, if you leave it on while you are in there!
A lot of folks will turn it off at night, because it may start in the middle of the night, if the pressure were to drop enough (slight leak at faucet?)...and that would be annoying!