Pulsing sound when water pump is on

[baraff]

Originally Posted by Old-Biscuit

This ^^^^^^^
And one other note
IF pump is cycling w/o any faucet etc open you could have a LEAK

Could be dribbling from water heater T&P Relief Valve
Could be dribbling out city water inlet connection
Could be toilet water valve leaking
Could be pump internal check valve not closing completely
Could be leak at any one of the Numerous fittings (common are the ones on water heater tank)

So when pump is 'pulsating' is clue to why it is doing so

And this is why I never hook up to campground water, except to fill my tank.
Nothing will kill an RV faster than an undetected leak.