Patrick, As others have said and that I can attest to, you will not save a boat with a 1-1/2” hole in it with a few bilge pumps.
I just got back from working on the bilge pump upgrade to my boat. My goal is to have a small bilge pump to pull out the usual amount of water that ends up in the bilge. I am service the existing Whale Gusher 10 manual pump located at the helm. And I have added a Rule 2000 pump on a raised platform in the bilge for water evacuation that the small (650 GPH) pump cannot keep up with. The new Rule requires a new thru-hull which I will locate in the transom next to the existing thru-hull for the Whale Gusher 10. The small pump will exit per the C&C design, into a tee fitting in the starboard cockpit drain. Recent pictures in the blog. Best, Dave Godwin 1982 C&C 37 - Ronin Reedville - Chesapeake Bay Ronin’s Overdue Refit <http://roninrebuild.blogspot.com/> > On Apr 14, 2016, at 3:40 PM, Patrick Davin via CnC-List > <cnc-list@cnc-list.com> wrote: > > I've been debating my bilge pump plan for a few months now, and having > trouble deciding. What have others here decided is sufficient pump capacity? > > I have two Rule 800s now and am considering upgrading one to an 1100 or 2000 > gph, as a high water alarm. That will require upgrading the hose from 3/4" to > 1 1/8", and enlarging the thruhull at the toerail. One of the bilge hoses > runs through the stbd head (into the head cubbies) and the other runs through > the hanging locker fwd of the head. Upgrading will require enlarging some of > the hose holes in the boat's liner (below the cabin sole) probably, and of > course hole sawing a larger thru hull. So it's a good deal more work than > just replacing bilge pumps, their wiring, and adding a float switch + alarm. > > From Wally's page I know he installed a Rule 2000. > http://www.wbryant.com/StellaBoat/Projects/bilgepmp/bilgepmp.htm > <http://www.wbryant.com/StellaBoat/Projects/bilgepmp/bilgepmp.htm> > However it sounds like Wally's LF38 had his hoses run differently - to the > stern quarter - while mine are to stbd mid-ships. > > With two 800's I'm at the low end of the 1600-2000 gph capacity range > recommended by West Marine (and yes I've read all about how actual capacity > may be much lower, due to voltage drop, head pressure, etc). I've also heard > it doesn't make much sense to say that bigger boats need bigger bilge pumps - > a 20' boat will sink just as fast (or faster) with a 1.5" hole as a 38' one > will. > > I'm more concerned with having the capacity to prevent the boat from sinking > at dock if say a 1.5" thruhull disintegrated somehow. Less concerned with > emergency pumping while onboard, because I'm not going far offshore and I > have a lot of emergency hole plugging options to try (putty, foam, wood > bungs, carrots, etc). > > -Patrick > 1984 C&C Landfall 38 > Seattle, WA > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you like > what we do, please help us pay for our costs by donating. All Contributions > are greatly appreciated!
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