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Old 10-19-2018, 06:13 PM   #22
BrianSmith
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City: Wherever Smartini is
Country: USA
Vessel Name: Smartini
Vessel Model: 2002 Kristen 52' Flybridge Trawler
Join Date: Mar 2014
Posts: 307
Just yesterday, I finished a bilge pump update on Smartini. Had a Rule 3700 GPH pump w/ a float switch, and a one-way valve in the outlet hose. I have:
- removed the one-way valve.
- installed a Whale Smart 650 gph pump w/ a totally contained water sensing switch, with a one-way valve in the outlet
- installed a 3-way switch for both (Off / Auto / Manual)

I shut the pumps off, filled the bilge with water (about 5 gallons or so) and turned them on. It was empty in 5 seconds, but then the water in the outlet hose of the Rule 3700 ran back into the bilge, and it took about 25 more seconds for the smaller pump to empty it.

So now I have a small pump that will extract all but about 1/3" of water, which should be the only pump that ever comes on. If it fails, or can't keep up with a leak of some sort, the two together can clear about 1 gallon per second. I'm happy!
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