Revisiting this thread, as I came across a few interesting articles today: * http://www.yachtsurvey.com/bilge_pumps.htm * http://www.docksidereports.com/bilge_water_blues.htm * http://www.sailnet.com/forums/gear-maintenance/93937-bilge-pump-non-return-valve.html
I found those googling about bilge pumps and check valves, as I'm in the middle of overhauling Grenadines' bilge pumping system which currently has check valves in it. Then it occurred to me: maybe I ought to think about the design principles for my bilge pumping system :) Instead of just refreshing what's there with new components implementing the same design. The articles were good for provoking thought about that. I came to some conclusions that seem right for my situation. Cheers, Randy ----- Original Message ----- From: "David via CnC-List" <cnc-list@cnc-list.com> To: "cnc-list" <cnc-list@cnc-list.com> Cc: "David" <davidrisc...@msn.com> Sent: Wednesday, March 8, 2017 3:46:40 PM Subject: Re: Stus-List Automatic Bilge Pump? Recommendations? If you have a catastrophic failure good batteries and luck (attentive neighbors?) will save her on the mooring. If you have bilge pump counter on an automatic telling you the pattern of pumps per time period left unattended, you may see a problem before it gets out of hand. And hardwired to battery with fuse... Cheap insurance. David F. Risch (401) 419-4650 (cell) From: CnC-List <cnc-list-boun...@cnc-list.com> on behalf of David Knecht via CnC-List <cnc-list@cnc-list.com> Sent: Wednesday, March 8, 2017 3:45 PM To: CnC CnC discussion list Cc: David Knecht Subject: Re: Stus-List Automatic Bilge Pump? Recommendations? I am curious about the logic of this. My boat is on a mooring unattended for days at a time. I have a manual bilge pump that I turn on if necessary. If I am not on the boat and a serious leak develops, the pump would run until the battery is dead and then the boat would sink. So under what circumstances would you expect an automatic bilge pump to save the boat? Perhaps a slow leak? Also, I normally turn off all the boat power when I leave. If you have an automatic switch, do you have the switch wired directly to the battery, or do you leave you electrical system on when you are not on the boat? Dave Aries 1990 C&C 34+ New London, CT On Mar 8, 2017, at 3:31 PM, Matthew L. Wolford via CnC-List < cnc-list@cnc-list.com > wrote: Remarkably, my boat was not equipped with an automatic bilge pump, but instead has an external pump located near the nav station operated by a circuit breaker switch. I recently purchased a Water Witch for the bilge and a three-way switch for for the circuit breaker panel.
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