I have a 2012 CC 29RE. My black tank valve has always been hard to open and close. I've had to put one hand next to the valve handle to give me enough leverage to pull the handle out.
So I pulled the hard plastic cover off the bottom of the 5th wheel. Cut the insulation to get to the valve at the end of the cable. The valve is located between the black tank and the outlet pipe.
I have tried unsuccessfully to remove the valve - twice. It is held in with 4 nuts and bolts and the valve is sandwiched in-between two flanges. I can't move the flanges far enough away from each other to slide the valve out. (I know, how hard can THAT be?)
With the bolts out, my valve handle moves VERY easily. So the problem occurs as the bolts are tightened. The valve is binding up as it is captured between the two flanges as the bolts are tightened. This happens because the two flanges are not parallel.
My solution ended up being to only tighten the bolts enough so the valve would not leak. I don't have a long term solution, since there is no room in the area to get the flanges realigned.
Pat & Karen
2012 CC Silverback 29RE
2013 Ford F250 Lariat, Crew Cab, Short Bed, Diesel, 4WD
Retired and trying to travel where it's warm.