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Thanks for the write up Jim and the pictures! I am sure this will help someone, if not me down the road some day.

I have had some intermittent issue with mine wanting to keep cycling. I had assumed it was an air pocket in the pump, mainly because it seemed to happen when I would connect city water to fill the coach and forgot to turn off the water pump and it seemed to cause this cycling. To get it to stop I usually turn the pump off and connect to city water and run the faucet at full open to clear any air out of the system, seems to work to stop the cycling issue. 
I will take a closer look and see if maybe its leaking at the seal and that is what is actually causing it to cycle.

Anytime mine cycles like that I shut the pump off, open all faucets (sinks, shower, wet bay) and then turn it back on and let it clear the air pockets.