Priming the Fresh Water Pump

[shawn_fountain]

I drained my fresh water lines on my 35FC80 side bath using the knobs
at the rear bed compartment. I filled the tank halfway and tried the
sinks. I hear the pump running but no water is coming out. The
commercial hookup works fine. No water is leaking out anywhere. Does
the pump need to be primed? If so, how?

Thanks,
SDF
35FC80