Made a huge rookie mistake today. I've been trying to get some literature on how to fill fresh water tank.isee the guides in this forum but they can be confusing to a newbie. I think the term"city water" should not be used with"fresh water" cause isn't city water fresh. I would rather they used faucet and tank or something similar. I have a 13 torque 301 with the 4 way Andersen valve which I had set to tank. There are obviously only two water connections that a garden hose will attach to. One is for fresh/city water and the other is the black tank flush (which I thought was for filing the fresh tank). Guess which one I hooked it up to to. I have two stickers next to the hookup for city/fresh. One sticker is on top of another. The top sticker is labeled city and the bottom sticker is labeled fresh. This led me to believe that the hookup to fill the fresh water tank was the lower one( the black flush) . The cap also looked like my old trailers fresh gravity fill. Well when I was filling the fresh sensor wasn't moving and the black tank was filling. I thought it was just the sensor cause they are known for being inaccurate. Well i was doing other things while filling and before I realized what happened it was too late. I saw water all over the bathroom floor and the toilet was over flowing and for some reason it was raised up off the floor like someone pulled it up from floor.not sure y that happened. I'm not sure how long I had it going but it wasn't too long considering it could have been worse. The great thing about this was it was clean water. I mean it looked like it had just come out of the faucet. I don't think the previous owner even did #2 in the camper. everything is like new. Anyway, I shop vacced as much as I could went down to the lower storage removed doors. I put a dehumidifier on the floor next to bathroom and put fans in the lower storage cause that's where all the water went. I also tilted the camper and got as much as I could to drip out. If there is anything else you guys would recommend doing to help with this matter. The dealer said I shouldn't need to remove that black under belly cover. He didn't have the manuals from the previous owner