Fresh water overflow line running water for no reason

descott12

Hello all. I have a 2025 Tab 320S and just got back from an overnighter. When we got home and pulled to the top of our steep driveway, I noticed that the freshwater overflow line under the back near the center was dumping gallons of water. It is the blue hose that runs for a minute or two when I completely fill the fresh water tank. The tank should have only been about half full when we got home so there is no reason for this to be running at all. It probably dumped close to the entire remaining half tank but hard to tell for sure.

The only unusual thing about this trip is that I forgot to turn off the ALDE hot water heater and it was running off propane all day. But that shouldn't have pressurized the fresh water system to make it overflow, should it? The Nautilus was set to Dry Camping. Any thoughts?

Thanks in advance.

descott12

I forgot to mention, when it was dumping water, the RV was on a decent incline (front end higher) and both the gray and fresh water level LEDs were lit up all the way. Obviously incorrect but I have never seen that before.

Also, I did refill as usual until the overflow line ran for a minute and now all seems ok but i would really like to know why my RV spontaneously dumped all my fresh water!!