Over time the handles for dumping the tanks have become harder to pull. For sure do not want to break those off !! What does everyone use to lube the handles with ? Thanks !! :h
I don't think the handles/rods are as much the problem as the valves themselves. There are products like above that may help lube the valves. I always try to keep the valves wet, especially the black tank valve. After dumping, I always add about 3 gals back in, to slosh when traveling, and keep the valve seal wet.
At some point, if sticking, just pulling too hard, replacing the valve, may be the best option.