Old brass thru hull for sink leaking - SailNet Community

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Old 04-24-2012
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Post Old brass thru hull for sink leaking

I have a leaking brass thru hull, original on my C&C 34, 1980. It has horizontal shaft, with large nuts both ends, and 2 small 1/4" nuts on the sides. Any one know the make and inner workings of this product. What should I tighten or replace to stop the leak. Leaking at large nut on ends of hztl shaft. Thanks
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Old 04-24-2012
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Re: Old brass thru hull for sink leaking

Seems unlikely it is brass--more likely bronze. Does it look like those featured in this How To by Sailnet's MaineSail?: Servicing Tapered Cone Seacocks Photo Gallery by Compass Marine at pbase.com
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Old 04-24-2012
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Re: Old brass thru hull for sink leaking

You might have dezincification if brass. The metal in the through hull will be very weak and have a pink color since the zinc is leached out and you only have a copper sponge left. You will need a new through hull in this case.
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Re: Old brass thru hull for sink leaking

Most likely bronze, not brass as arf noted. And I would guess a tapered plug type based on the boats age and your description. If so, they can be repaired. If its a ball valve, replacement is probably the way to go. Post a pic to the help!!
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Old 04-25-2012
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Re: Old brass thru hull for sink leaking

Arf nailed it, exactly, I took a pic today but no need as that "how to" at pbase.com was excellent and totally described everything. I am west coast so the boat is in the water, can not service till next pull. probably has never been serviced in decades if ever, who knows. Cool project though and I have 5 of them.
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