Hi everyone! We recently bought a PUP, and the previous owners had winterized it, and I am having a hard time finding a video to show us how to DEwinterize it properly. We went on our first trip, and hooked up to city water - and water came pouring out of what we assume is the overflow of the freshwater tank. NO idea what all the valve handles go to, and the schematics diagram in the manual isn't helpful as it looks NOTHING like the actual set up. Help!