SeaKnots

My B43 has 2 electric bilge pumps. One is a Whale diaphragm pump operated manually, other is a Rules 1100 gpm centrifugual automatic pump. Rules has a non return valve on the outlet hose. Though I replaced it, it stucks most of the time. Pump works but does not discharge. I think the problem is pump can not overcome the pressure of the water and may be a possible air lock behind the valve. Rules does not recommend a non return valve but Beneteau has put it for a safety reason. I do not know if the discharge hose has a bend to prevent back siphoning.
In a dry boat if you do not test the bilge pump buy filling the sump with water, it's nearly impossible to notice the pump failure.
Has anybody experienced this problem, and what was the solution?

Views: 195

Replies to This Discussion

We have hull #001 and like you have two pumps, the Whale and Rule. Although I haven't inspected the entire length of hose I don't believe there's a check valve in our Rule's discharge line. I've had air locks occur with the Whale, but never with the Rule. Additionally I've seen the Whale back flush but never the Rule. If you can try removing the Rule's check valve and test run it to see if it back flushes. If it doesn't leave it out.

Mike

October Moon

Thanks Mike.
If yours have a check valve, it should have been located just about 30-40 cm away from the pump. So it seems they didn't put one to yours. A problem might be the discharge thruhull which is only 15-20 cm above the water line, when heeled can take water in and start a back syphoning. Level of the hose is almost horizontal (if there is not an antisyphon loop somewhere) which can cause a back syphoning.
Without a check valve back flush of the water inside hose can not reach the sump level to trigger the pump. (But very close) Otherwise pump would work continuously.
Vedat
I haven't had any issues with siphoning while motoring or sailing. Note that the Rule has a predetermined run time regardless of the presence of water in the bilge. This ensures any water in the hose is fully evacuated. Probably why I don't have a check valve.
Mike
Mike, I agree. Check valve also reduces the flow seriously. Thank you for your comments.
Vedat
Vedat, I had to look in the bilge the other day and decided to look for the check valve for the Rule pump. Yes we have one, just not where I expected it to be. One more thing learned about my boat.
Thanks
Mike

RSS

Latest Activity

Robert & Sandy replied to sam's discussion eyebrow salon window re-bed in the group Beneteau 40 & 43
"Hello all, I realise coming into this year old conversation could be somewhat strange though sharing advice is always beneficial.. Our B43 had her port large saloon window repaired under warranty after it developed a gap and obvious leak. The boat…"
Mar 12
dryfirewood is now a member of SeaKnots
Mar 4
zeehag left a comment for ___/)ances With Sails
"bubba died  but he seems tohave sent a nother special boy to me..a scared  confuzed precious  with name pusskins which i changed  to sir puurrcival pusskins.  much more refined name for such a precious furry one.  he is…"
Mar 3
___/)ances With Sails commented on LOLA's group SAILBOATS and SLIPS FOR SALE
"My boats for sale. Search Craigslist/New Orleans/S211_A"
Feb 22
___/)ances With Sails left a comment for Lola
"Happy belated holidays!  I'll email you. "
Feb 22
___/)ances With Sails left a comment for zeehag
"Karen!! Dang!!!!  How did Bubba use up 9 lives already? Sorry to read that, kid."
Feb 22
olivia scott updated their profile
Feb 11
olivia scott is now a member of SeaKnots
Feb 9
ADVERTISE ON SEAKNOTS CONTACT US AT: 
candrac@sailforwater.com

© 2024   Created by CAN DRAC.   Powered by

Badges  |  Report an Issue  |  Terms of Service