I have my pump plumbed external, when I turn the power off, water of course starts draining down the output tubes in the tank. The only way to get the cor to start back up is to move the output tubes (loc-line ) out of the water to stop draining, then the pump will start. ??? Its a Cor 20 , I cant wait for the water to get that low because it never will, I have 2 return pumps plumbed.

So if the power went off and on real quik, would still have to wait for water to drain below lock line.