[RussWhite]

Chester,

I didn't get the picture, but I think I can help.

There is a N.O. ( normally open ) solenoid on the bottom of the water filter - I will call it a water separator. Here's how it is supposed to work....

There is a check valve where the air enters the air tank. Between the air tank and your compressor you should find the water separator you are talking about. When the compressor runs it sends voltage to the N.O. solenoid and the valve closes so no air can escape from the separator. But, when the air compressor stops, so does the voltage to the solenoid valve and it opens. You should hear a swoosh of air as the air between the compressor and the tank exits through the solenoid valve. Along with the air will be any water that has accumulated in the bottom of the separator.
Mine did not work properly when I got the coach and the result was water in the air tank. I fixed it and now no water in the tank.

Hope this helps. Russ

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Sorry Chester - I was looking for the picture at the end of your post. Explanation still stands. Russ