Getting ready for winter

Thanks followed the sound and found it under the bathroom sink??

I have noted in my experience with many RVs that the pump sometimes can be located between the water tank and the closest faucet or hot water heater.
Running the water faucet with the pump on will activate the pump which may give you some audible clues as the the location of the pump.
When all else fails, follow the pipes. The pipes never lie.

My Fifth Wheel, the water tank is in the back, the pump is located in the front side compartment above the sewer drain outlet and such, near the fresh water inlet. The pump sits on the wall between the compartment and the front compartment where the batteries are stored. Mine is really out in the open as far as finding it. It is also next to the fresh water filter.

Should be right behind the panel where your fresh water hookups are. Usually has a small screen/filter that must be removed during winter else it will freeze and crack

In most RVs, they are generally located close to the fresh water tank. Minimal length of suction required.

Ken

I don't think there's a standard place, since the layout is different between bumper pulls and fifth wheels. It should be near your kitchen & bathroom.

Hopefully your pump is loud enough to give you a ballpark idea though.

Our last bumper pull toy hauler had the pump in one of the kitchen cabinets. It was loud and very easy to find and access.

Our current fifth wheel has a quieter pump and it's harder to get to. You have to remove a panel beside the kitchen sink to get it, or go on a long crawl from the front cargo hold after removing the partition panel.

Long story short though, I don't think there's a standard location for the pump.