I know what you mean, but we drive 4 days home and we like our showers. I found the waterpump under the bathroom vanity; very odd to have the pump inside the box, so to speak; all past units have been in the "BASEMENT" somewhere. I will look at it tomorrow in daylight to see if there is a filter bowl attached to the inlet, or if adjusting the :SCREW" will improve things. I do have a spare pump. I don't even know if there is a built in system filter on this unit. Our Bounder had one.
Gotta get rid of that annoying pulsing somehow. I am like a dog with a bone; I won't give up.