City water or On-board tank?

ricks99 wrote:
But wouldn't you have to turn off your water pump when you leave, to avoid the same issue?

Seems like the same difference to me -- turning off the city water nozzle or turning off the pump.

Or am I missing something obvious?

Read this thread in it's entirety and you'd see I already addressed this exact issue. In my first reply to your post I said - "I likewise could forget to turn my water pump off before leaving our site but for whatever reason I usually do remember, maybe because the switch is right there inside the camper and hard to miss." :)

Obviously all trailers are different as to where the water pump may be located but it's usually in a fairly obvious, easy to see, easy to reach location and frankly hard to miss. Here's mine, on the wall beside the slide, in clear view as I enter or exit the camper. It's part of the tank monitor / water heater control panel.



All this said, most RV owners can hear the pump whenever it runs, erroneously blaming the pump for noisy operation. I say "erroneously" because the pump itself isn't noisy at all, it's the way it's often inadequately installed in the trailer, allowing any vibration it makes to transfer into the trailer's floor, walls, cabinets, and hard wall PEX. Being so noisy it's therefore easy to hear the pump run, even when it shouldn't, in some cases so much so you can hear it when you're outside sitting around the campfire. I solved those issues for myself, quieting the pump to the point where I had to install a light in the pump circuit so I would know when the pump is running. That was several years ago and so far, so good, no leaks as the pump only runs when it's supposed to. :B