[Carl n Susan]

Many of us have done this repair. It is relatively easy. I seem to remember a 2009 is a pre-dropped frame model. That makes dropping the coroplast a little more time consuming. All models and years have a similar problem. The plumbing is installed without any slack. The valves have a lip which needs to fit into the plumbing. The best solution is to cut out part of the drain line and install a 3" no hub connector.

There have been several discussions on the change in the past. Search on "black tank" or "valve replacement" to find them. Here are some:
http://www.montanaowners.com/forums/...ad.php?t=66825

http://www.montanaowners.com/forums/...ght=black+tank

http://www.montanaowners.com/forums/...ght=black+tank

http://www.montanaowners.com/forums/...ad.php?t=72524