Join Date: Mar 2008
Location: Anacortes PNW
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Re: Rule Bilge Pumps
The nice thing about the diaphragm pumps is that you can mount them up under a settee and run a pick up hose to a bilge area.. you don't need a lot of 'headroom' for that. The problem of finding a switch that will activite within the two inches remains.. the switch will fit, but won't activate until the floorboards are floating (which, in an emergency would work, I suppose...)
Get a Water Witch switch, and instead of mounting it conventionally, mount it on its side with both water sensors facing down. Use several washers or a nut as a spacer on the screws you use when you screw it down. Set it to have it sit 1/4-1/2 inch above the bilge floor and you're set.
These electric switches are better than the mechanical float switches anyway.
Edit: Smurphy beat me to it, but for your application you may still need to install it with those two big metal water sensors facing downwards.
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Last edited by MedSailor; 11-29-2012 at 01:11 AM.