[Richard]

Well……..this is very interesting.

I don’t know if my comments are relevant, many of my previous ones were not.

One, if the simple regulator is working now, when deadheaded like that, then why did it increase over night when in line with the potty waterline. Just out of cause and effect curiosity, if you deadhead the water line going to the potty with a gauge, does the pressure in the line increase over night?

Second comment. Many years ago, I had potty wars, so I decided to rebuild the sequencing valves in my coach. I had the old style, with the top cap that allows you to see the piston, and uses the piston with the longer top section. I COULD NOT get those bodies and spindles to perform reliably with new o rings from the rebuild kit. I do not know why. I rebuilt them several times with no luck. Lots of lube, very little lube, o rings from Mulanney, o rings from McMaster, all with no joy. The final straw was a midnight flood produced when a guest did not know to wait and watch to see if the potty functioned correctly. Mine would jam in the refill sequence for the bowl.

So I ended up buying two new style sequence valves, the grey bodied ones with the solid top. I was frustrated like you, but not willing to take the risk on another flood. I hated to give up like that given the price of a new valve. I never figured out why the old ones would not work with a rebuild kit.