[Land Yacht]

Richard, thanks for the explanation on the sequencing valve! Maybe like Jon's I need to clean and lube the sequencing valve as this toilet as always been a bit troublesome. In the beginning the flapper would stick open, it actually emptied my fresh water tank once when I was in a hurry and I did not take the time to make sure it finished its cycle properly. I lubricated the flapper and adjusted the sequencing, and all was well until this this weekend. As I am writing this I may have figured it out. Last week I fixed the 12v water pump and was running on it, till late yesterday when I switched back to the 110v pump. As you mentioned it is the combination of air and water. The 12v pump probably has a lower psi. All seems to be working now - go figure. there are just too many variables to be prescriptive in some of these systems...