We didn't have any leaking problems with ours but man did that think make a racket! It made so much noise you could hear it out side the trailer and it made the kitchen sink faucet vibrate and rattle.
Personally I think those pumps are junk! We replaced ours with a better Shurflo pump and made some plumbing line changes and added a foam rubber pad under the pump and now you hardly hear the pump run.
Also we get better flow and less cycling with the Shurflo pump.