Join Date: Jul 2008
Location: Smithfield, RI
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It occurred to me That another solution to your problem is to put a high point in the hose shortly after the pump, if you can. So the hose would come from the pump, go up 12 inches, come down, go to the thru hull, up 12 inches above that, then down to the thru hull.
This is not ideal, as anything that makes the pump have to work harder reduces flow, but it is better than a check valve, which reduces flow even when it works properly.
However, if you need as little water in the bilge as possible, then this might be a viable solution for you.
Oh, if the thru hull is high enough - at least 12 inches above the water line when your boat is on its ear, then you can avoid the 12 inch rise at the thru hull.
Last edited by jarcher; 05-31-2009 at 03:51 AM.