After sanitizing the freshwater system, the drainpipe on the holding tank developed a slight leak. My first Instinct was that the cable had slipped past the set screw and the valve wasn't closing completely. After crawling under the coach, removing the inspection cover, and adjusting the cable, the leak only got worse. Each time the valve was opened and closed more and more water flowed out. This could mean only one thing; The valve seals are shot and need replacing. As a temporary fix, I cut a...