I use the outside shower hose to fill fresh water tank. When hooked to. City water, just remove the shower head from the hose and put it in the fill tube. Lots of air can escape for venting, the water is filtered, and when done just replace the shower head, close up the film tubs and when you use the onboard water, it gets filtered a second time as the pump draws through the filter.
Brenda and John
'14 Ram 3500 MCSB 6.7L HO PullRite 16K S/G, Grey Columbus 320RS Camped '14 - 146 days/'15 - 196 days
USN-EOD(Ret), Master Chief, 30 yrs,
Master Blaster of the Navy