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...
This model is a 290EFS. If there is a 3rd valve then the handle has come off as some say. If so, then there must be a slot or some kind of opening where it had once came thru. I assume the underbelly is held up with screws of some kind?