X2 What Spare said. The GPH rating system on pumps is well overstated. I have one 1000 and one 1500 Rule's in the bilge of my 20. One of the automatic switches is higher than the other. I can put a 3/4" garden hose at 60 psi loose in the boat. The first 1000 GPH pump comes on, pumps the water out and turns itself off. If the second one kicks in a light and alarm sounds to warn of high water in the bilge. I have heard the alarm during testing but never on the water.. I try to keep the bilge clean so nothing can jam the impeller. I am OCD about the pumps on this boat. When either one of them die, I am going to upsize again. I started with an 800 and a 1000.
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1996 -19' NV Flats 115 Mercury 4-stroke
1983 -20' Wellcraft Center Console 250 XS
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