I am back and having flashbacks of college days gone long ago.
I hooked up the hose to the camper to fill up the tank and spang (not sure if that is a word but you may have typed it here in the past too) a bad leak back behind the commode where a human being was not intended to see or be seen.
The fitting was a little loose, even for plastic, so I tightened up a bit, crossed my fingers and had the wife winch me back to an upright position.
And you are right, it didn't help.
I got a mirror and a screwdriver and found 2 brass screws, both looked snug- hard to get loose when I decided to take it off.
I dropped the plastic (valve?) with an O ring.
At first I thought there were 2 O rings but the top one would not come off and looked more like it was attached so I left it alone.
the large O ring was a little hard but not deformed or brittle. I have some experience with water lines and O rings but it looks like it "might" be the problem.
All that history to ask another question.
Is there something else to do other than replacing the O ring?
Since I am down there already, should I replace the plastic valve?
Thanks in advance.
Tim stuck in a tight spot!