I want to replace the factory water pump in my 2011 Coachmen Mirada. Waaaay too loud. Just doing a quick search on Amazon, turned up 3 potentials: $75.39 -- Shurflo Fresh Water Pump Model 2088-...
Before replacing I would make sure it's not a mounting problem. Start by removing the screws that hold it down and put some foam/bubble wrap under it. If this helps enough then you might want to try something like this.
