All, thought I would share with you a problem I just encountered with my water pump.
I have a 2012 31BHPR and was using the water pump when it just suddenly stopped pumping water even though power was being supplied to the pump. It's a Flojet 3526 (Full P/N R3526144). Since the trailer is only 7 months old, I was a little bummed.
Anyway, I pulled the pump out and removed the pressure switch assembly and manually cycled the switch while checking for continuity on a volt ohm meter. I should have checked it before I removed the switch, but hindsight is 20/20. After cycling the switch several times (by pushing in on it and releasing), I placed it back on the pump, and tested it by reconnecting power, and voila! Problem fixed!
The water pump location in this trailer is under a panel just aft of the laundry chute. Also, the installation/schematic/owners manual can be found here: http://www.xylemflowcontrol.com/files/81000-384.pdf
Mike