Water line came loose.
We were on out third camping trip in our 2015 182G. Camping in a state park, with full hook ups. Attached the water hose to the fresh water connector on the outside. All was fine for a couple of hours, then all of a sudden I heard the gushing sound of water running, took me a few seconds to figure out what was going on. It turned out that the hose which is located under the bench, between the furnace and water heater had come loose, and water was for about twenty seconds or so flooding into the r-pod. Luckily we were there, I hate to think what the situation could have been if we was gone for a few hours, the whole camper would have flooded😭
Having a closer look at the hose and the clamp, it was not adjusted and tightened properly from the factory, a good reminder to check all connectors on a regular basis. We were able to put on a new and better clamp, and all seems fine now.