Will do, I already had the dealership change the out flow valve at the black tank. It was set up to get pulled by crawling under the unit and reaching up sort of around the piping and pulling that 1 open. Then going do to the gray / black discharge coupling point and opening another valve to discharge. Holly crap, a lot of crawling around to get the poo out. Of course we saw this during our walk thru, pity the folks who don't make the dealer to a complete walk thru, just because we're experienced. Had them sort of redesign so not to have to crawl underneath. Thanks for the insight will keep an eye out, we won't be putting any water in her till May 5th or so. Temps are too cool at night to trust the lines not to freeze.