Filling water tank without pressurized hook up

The problem here is, folks, that you're using =power= to run a pump. If you're boondocking, you have to have solar, generator or run power from your truck, or you'll drain your coach batteries pumping that much water. It's just =dumb= that they don't also have a gravity fill on these newer units. Even taking a shower, you're only pumping a few gallons at a time, then you shut the water to trickle, then a few more gallons to rinse; not 30-40 gallons, or more.

Lyle