I got a horrible story about this. On my old Keystone Zeppelin my freshwater hookup was located next to the electric on the driver side of the trailer. The Rockwood has a black water flush in the same spot. I arrived at camp late at night after a 14 hour drive. The kids were screaming, I was hooking up the hoses as fast as I could and I did it. Hooked the freshwater to the black water flush and cranked it on. Well about 6 minutes later I had the big green flood out of the camp kitchen drain and all over the place. I remember reading someone else's post about this same issue and immediately shut off the water and ran into the bunk house where I was 3 inches away from the chemical water hitting the carpeted section of the bunks. After $100.00 in cleaning supplies and fans at the local Fred Meyer and 3 hours of labor it was all fixed. Disgusting. When I got home I caulked everything in the camping kitchen to stop it from ever leaking into the trailer (not that it would ever happen again) I also found a gaping hole where the pipe ran through the wall into the back bunk house pump area. I filled that in with expanding foam. Solved the issue with the rear bunk house always being colder then the rest of the trailer.
Phil, Michelle, Logan and Wyatt
2006 Dodge 2500 Heavy Duty 5.7 Hemi
2012 Rockwood 8312ss