Since we dry camp a lot with sites with remote water I came up with this solution.
a) mount a RV water pump in our pass through near the water inlet
b) wired the pump in with on/off switch
c) outlet tee into the fresh inlet line
d) inlet flexible tubing with SS dip tube
I use the blue 7 gallon water jugs, stick the dip tube into the weater jug, turn on the pump.
Works great and game me a reason to replace the noisy OEM TT water pump. Put a higher quality, quieter pump as the main pump and used the old OEM as the one in the pass through.