Originally Posted by beaslbob

Reference the picture posted above.

"my" design I have "F" much higher where the middle of the horizontal part determines the tank level. So the overflow is actually internal to the pvc and external to the tank.

I have never tested the design posted but my "gut feel" is there is not enough water "trapped" in the pvc to keep it primed in a power outage. So it will restart reliably on power return.

But then people use that design and swear by it.

So perhaps I am missing something.

my .02