[dutchmensport]

No. Actually, the water pumps themselves run very, very quiet. What you are hearing is the vibrations from the pump magnifying and amplifying through the pipes.

For what it's worth, my water pump is located right behind the wet bay. Its accessed by taking the wall off in the front cargo pass through, and located right there. We never hear the pump run there, even when we are right next to that area or inside the camper right above it. What we do hear is the vibrations pounding in the bathroom, which is near the middle-end of the camper, some 25 feet away. It sounds like the pump is right under the shower. But, it is not, as I've seen it behind the wet bay wall.