[Richard]

Mike, I don't know about handle direction, but I do know that new users on our coach have to be instructed to hold the handle until they here the sequence valve cycle. A short burst on the handle like one would use on a normal toilet handle like that results in a confused sequencing valve. On our coach you can get the toilet to overflow if you short cycle the flush handle.

Another thing to keep in mind is water pressure. High water pressure, such as hooked to city water and the pump on with our coach will result in a jammed sequencing valve, and a corresponding flood.

When you look at how the sequencing valve works, the high pressures make sense. The sequencing valve is a spool valve that slides back in forth in a bore. There are several chambers in the bore. Some of them control water flow, and some of them control air flow. The activation of the handle moves the spool valve all the way to the end of the bore. The spool then moves back to it's original resting position. As it moves the spool moves past different chambers and outlets in the bore which control air and water flow. If the sequencing valve sticks then water or air flow does not do what it is designed to do. Knowing that the retraction of the spool is influenced by both air and water pressure explains why Microphor is explicit in their instructions about the water and air pressures fed to the toilet. Of course, I didn't pay much heed to the instructions until I mopped the floor a few times.