I've owned more than a half dozen assorted RV's prior to owning the supposed higher quality thing I now have, and it's the first one where I've ever experienced an issue like this. It's a pressurized fill system rather than the gravity I had on everything else, and it has vents coming out both sides of the frame which will dump as much as two thirds of my fresh water tank on a mountain road heading for the good hot weather spots. Of course there is no water available at most of the ones I prefer. Heartland did so many stupid things like this on my current rig to where It's almost worthless for actual camping.
