I'm really wondering about your lineup. You said you were camping on city water why did you have to fill the HWT after you got home? Are you sure your suction valves for the pump are on FW and not Antifreeze? Check the strainer cap if one is installed on the suction side of the pump.
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho