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I have check valves in all my bilge pumps even my gusher...with high mounted discharg through hulls, if you dont as soon as the pump shuts down you will get all that vertical line draining back into the bilge...If your worried about reduced flow add another pump to make up for it..I have 3
Last edited by Stillraining; 05-05-2008 at 09:46 PM.
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