On my 44 I have a deep sump aft of the mast with rule pump . The pump must push water slightly uphill almost 20 feet to discharge. Until I added a check valve the 20 feet water would seep back into the bilge and the pumping would start again. I don't see how or where I can add a loop close to the pump.
Any suggestions how I can get along with out a check valve? Fred Hazzard S/V Fury Portland On Mar 23, 2017 8:06 AM, "Gary Nylander via CnC-List" <cnc-list@cnc-list.com> wrote: > As I share the same design (30-1) with you and have that really deep sump > right under the mast, I have agonized over this issue a bunch. First, you > have to get all the water out or your sump will always be wet and your mast > step will degrade. Second, if you come up with a good way to install a > vented loop, let me know. I have a check valve in the line from the Rule > pump which is in the bottom of the sump. I know the limitations, so I have > my pump on a manual switch, so it won’t drain the battery. It is marginal. > > > > I am going to add a diaphragm pump to the system and have the intake tube > in the sump and the pump under the dinette seat. The vented loop and > discharge - ???. If I run it back to the stern or aft quarter like my Whale > hand pump and Rule, then a bunch of water will come back to the pump when > it cycles off. I am trying to figure out how to run the discharge into the > head area above the holding tank, put a vented loop right under the deck > and then exhaust through the side, but that may allow water intrusion when > heeled over. Still measuring. This probably won’t happen until next winter > – many other projects this time plus the mast is still up and I may pull it > next year. > > > > Gary > > #593 > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *RANDY > via CnC-List > *Sent:* Thursday, March 23, 2017 1:41 AM > *To:* cnc-list <cnc-list@cnc-list.com> > *Cc:* RANDY <randy.staff...@comcast.net> > *Subject:* Re: Stus-List Automatic Bilge Pump? Recommendations? > > > > 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 > <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 > > > ------------------------------ > > *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. > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > >
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