Originally Posted by Tadpole
That was my initial thought but when we filled the tank it only took about 10 or 15 gallons. wish that was the case though.
When I first got my RV, the tank would only take a few gallons before it splashed back. The gauge indicated only a few gallons. Turned out that it had something (piece of plastic, according to the repair shop) covering the vent so it would not take over a few gallons. I had the same issue with air in the lines. The pickup is too high in the tank.