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Location: Arlington, VA
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Easy. You run the hose -- with a small pickup on the end to avoid clogging -- under the cabin sole and back to an electric bilge pump. From that pump, you run the discharge overboard, with a means of preventing siphon back up.
A good bilge pump -- reliable and not too expensive -- is the FloJet (not a ShurFlo...very different pump). These have four small diaphrams and can run dry without harm. See, e.g.,
You can put a bilge pump switch under the cabin sole, too, and run the wires back to the pump along with the hose. Except for the very expensive ones (like $200), bilge pump switches are notoriously unreliable. Even the electronic ones with no moving parts crap out more often than they should, and they're all easily "tricked" into tripping by oil or grease in the bilgewater (despite all claims to the contrary). Probably, in your case, it would be best to just go with a simple float switch, and watch it/test it often.
It's a good idea to run the power for the bilge pump directly to the house battery, with an appropriate fuse or circuit breaker located near the battery. That way, you can turn all the battery switches off when you leave the boat, and the bilge pump will still be operational.
Last edited by btrayfors; 12-26-2009 at 02:19 PM.