Return Bulkhead so deep?

[hawk]

Originally Posted by Squiddy

I am going go try lowering the standpipe first to see what that does. When I had the pump opened right up, I could look down the top of the standpipe and it sure looked like there was plenty of room for that much water going down there. I think the problem is that more room is needed above the opening to the standpipe in order for that much water to drain due to surface tension probably?

But is the flow through the overflow teeth large enough to keep up with the pump? Does the level drop when the the stand pipe is removed and the pump is fully opened up?