underbelly filling up with water

[Bashful365]

Arrrgh. The underbelly of my 5th wheel, 36FL is filling up with water. looks like the underside is pregnant, very pregnant. I am almost to the point of popping screws holding the protective cover off. I think it may be my black tank flush not being hooked up correctly. The flush does not work. the hose pressurizes but nothing goes into the black tank to flush the system. This helps explain why I am having black tank problems as well, possibly. I am taking in for service but am nervous driving 100 miles to the dealer with that much water in the belly. I can push on the underside covering and hear sloshing. I have owned the RV for three months. Anyone else with this issue or suggestions?

[moose074]

First poke a hole or cut a hole you can cover it later. Mine is just a cheap plastic cuts easily with razor.
When I first got my current 5th wheel. I developed the problem on my second or third trip. It’s how I became a member that or the tv. Anyway I learned from this group that the backside of the connections aren’t always tight or that there are kinks. There is also for a lack of better term a back pressure valve in the city water outlet that is supposed prevent water from going into fresh water tank. While allowing water to flow from the tank when not hooked up to city water. My local dealer was reluctant to go fishing for the problem and I have only had it happen once since.

[nomad297]

That is use your auxiliary fresh water supply. Don't worry about it.

Bruce