I’ve been transferring fresh water into our fresh tank while dry camping from 6 gallon water jugs using the onboard pump but it takes about 5 minutes for each jug. I set the Nautilus valves for filling the fresh tank with the internal pump. I’ve also tried using an external pony pump setting the Nautilus for city water. The pony pump providing the pressure. I’d like to use an external pump to speed things up and wondered what others are using. The on board pump is the SHURFLO 4008-101-A65 3.0 GPM Revolution RV Water Pump. There seems to be quite a resistance to my pony pump that I’ve tried and wondered if something like a 5.5gpm 60psi RV pump used externally would be a good way to go.