If you need a new pump (I hope you don't), you might want to try one of the "new" (in the past year) Shurflo "Revolution" pumps, I put one in this summer. Works great and it's rather quiet. Doesn't hammer like my old pump and it's quieter than the Shurflo that was in my Jayco.
1999 28' Safari
2012 F150 Platinum Max Tow 7650 GVWR 3.73 Elec. Locking Diff.(Prev 2003 Dmax).
Honda EU2000i, Equalizer Hitch
AM Solar Panels 150W - 2 Trojan T 105 6V Batteries
On internet forums, please research and separate the wheat from the chaff (including mine!)