When I go to drain the black water tank the slide out device is very hard to pull out. I have used two types of lubricants on it to help "it slide" but to no avail. Any suggestions, the waste water ...
I have had that problem before too. I drilled a hole and put an automotive grease zert in the flat part of the valve where the rod goes back and forth. gave it lots of grease and the problem went away.