Not a pump problem, just water faucets!
We are Noobies to PUP camping and already have recently learned a lot about the plumbing on our recently acquired used (2011) Rockwood Premier 2516G. After a couple of days getting flat foreheads, we finally checked faucets & shower heads (sink, cassette shower, outside shower). We had water pressure at filter using city/'shore water' and the internal pump worked, but had nothing but a drip from faucets. Finally discovered the dime-sized plastic flow restrictors in all (3) Three faucet/shower wand filters! Removed them and, hooray!, we finally had water flowing! Never would have thought all 3 faucets/shower heads would each have been plugged. Can only guess that previous owners did not use camper water. Posting this to help someone else save some time or maybe money. We were ready to take it in for repairs.