How to Repair Your RV's Water Pump

1). Purchase a supply service kit from your pump manufacturer or RV dealer.
2). Set up a clean work area away from the vehicle.
3). Turn off the vehicle - no electricity should be going through the system. Turn off the water supply as well - no water should be going through the system.
4). Mark the wires plugged in to the water pump so that you know where they go after the repairs are finished.
5). Disconnect the wires.
6). Remove the water pump after taking off the mounting bolts and vibration pads.
7). Take the pump to the clean work area for the overhaul.
8). Remove the diaphragm-retaining screws and then the diaphragm, checking for cracks and defects.
9). Check all surrounding valves to make sure they are unobstructed, and then check and clean or replace the filter screen.
10

Replace the diaphragm.
11

Reassemble the water pump, and remount it in your RV. Reconnect the in and out water tubes.
12

Refill the water tank, and turn on the pump. Check for leaks.
13

Run the water pump until no air is left in the water system.