Have a 2015 Cardinal 3850RL fifth wheel. A year ago, on our way from CA to FL, the water tank almost fell out in Texas. Strapped it back up with a bunch of straps, and continued on our trip, no other problems. Since we used full hookups at campsites, we didn't have to use the water tank. Although we did keep a small amount of water in it so we could use the bathroom, sink, on the road till we hooked up for the night. So just now, after picking up our trailer from storage, and on way back to house, 2 motorists motioned to us on the freeway that something was coming out of the back of our trailer! Pulled over...the entire water tank was DRAGGING on the ground! And this time has a big hole in it! And this is after the dealer took 3 MONTHS to fix it last summer, put new brackets in to hold it up, new underbelly, etc!! My husband is irate at the moment. We were leaving Monday for a week...still are, as we'll have full hookups, just can't use the tank. All strapped up again. Called the dealer..same runaround, no one in till Monday, etc. Should still be under the extended warranty. Know this has been a problem..anybody else have this? At this point, I feel like I want a whole new rig!!