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Blake's Sea Cocks
Potential Leakage
My Rival 34 'Tantine' was built in1973, an early hull number. I bought her in 1997 and celebrate 20 years delighted ownership this November.
However a problem in about 2000, which nearly caused her to sink at the QAB pontoon in Plymouth, should I believe be brought to the widest possible audience of owners of 'elderly' boats
The Rival galley sink (like many of that ilk) is below w/line so must be pumped out through a skin fitting. A Whale pump through a Blake's sea cock.
When, after an enforced 6 week absence, I returned to the boat I found her stern down, with condensation inside the portlights, and was met on opening the hatch with water over a foot deep over the cabin sole - only 2 inches below battery terminal level. Damage both to the joinery and to the engine was extensive.
My brilliant insurers's (Pantaenius) surveyor subsequently identified the cause: a mis-machined 'cone drilling' in the Blake's sea cock that still allowed water to pass when in the recommended 90 degree closed position (which he confirmed it had been). That, with a pin hole in the pump gaiter, allowed the flooding.
The pump is not designed or intended to act as a sea cock. The Blake's product was and is. I published this dire note of warning at the time through the ROA but there must still be many other boats with similar Blake's sea cocks. I do not suggest that all Blake's contemporary or later products suffer the same defect. But surely mine cannot have been a unique instance.
I am disappointed that Blake have never acknowledged this issue (e.g. like manufacturers' recalls), but neither have they ever contradicted me.
As I say, I bring this to your attention only as as a potential safety issue for others - my own insurance claim is long since satisfactorily resolved. I have no interest in or against Blake. However I would feel culpable if another boat - or far more importantly a life - were lost because I said nothing.
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