I built a little cart that hauls two 5 gal coleman jugs, saves me from carrying the 80lbs of water. I use something called a Cobalt Maxijet Powerhead to move water from the jugs to the rv holding tank.
Cobalt MJ1200Sadly, it needs 110 volts, but it is much faster than any comparably priced DC pump I could find. 3/4" intake and 1/2" outlet sizes, you can use it inline or just dunk it down to the bottom of your water container. It is fully sealed, the electrical parts are actually coated with thick epoxy, the whole thing can go under water.
