Hello all, Have purchased a 2004 Keystone Montana. The sink keeps stopping up. My grey water valve is open. Shouldn't this water go right out? My black tank needs pumped which makes me wonder if th...
I think on some trailers the valve is on the 1-1/2" pipe that drains into the 3" pipe. I would have another close look. It sure sounds like there should be another valve. You may have to have a closer look near the axles.