[QUOTE=Karl;351560]
Quote Originally Posted by htfit View Post
I know this old, but did you ever figure this out?

I noticed mine are doing the same thing. Wonder if it is just the way it is.

Same issue on my 19 Max. I put check valve right before thru hull, so I wonder if this is why the sensor is kicking the pumps off before it will over flow. I've added time to the timers, bags are super hard, but no over flow...
I figured it out. I am sure this is check valve 101 but I didnt know. My check valve was installed in the right direction but I had the "exit" of the check valve pointed up and the hose going up. So basically water was getting trapped in the hose above the check valve and the pressure of the water was enough was to hold the little flapper closed not releasing the air.

It needs to be installed like murder max did his and have the check valve right before the thru hall on the hose going down to it so no standing water in the hose can sit on top of the check valve.

So just be aware of any sitting water in the lines caused by loops or ups and downs in the hose.

Hopefully that makes sense.

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