We purchased our new 2009 Big Country 3250 in late January and just the past few weeks have finally been able to try it out! We have had to deal with several leaks but still have one yet to go. This leak occurs "somewhere" behind a wall that we can't see or get to when we hook up to flush the black water system. Water comes pouring out in the underbelly storage area. Has anyone else had this problem and could assist in how to fix it? A phone call to Heartland makes it sound as though the only way to get to the possible culprit....a leaking or broken valve....is to cut an access hole in the wall behind our toilet! We certainly don't want to do that IF there might be someone out there who has experienced this problem and got to that particular valve an easier way! Please help!! Thanks!