Seacock fall apart in my hands while removing.... - Page 2 - SailNet Community
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post #11 of 28 Old 02-26-2018
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Re: Seacock fall apart in my hands while removing....

I have a feeling that you have had or still have an electrolysis problem. I would strongly suggest that you take a careful look at your electrical system, or get some professional help if it is beyond your knowledge or tool kit. I've sailed boats with bronze seacocks that were most likely original and around 60 years old.
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post #12 of 28 Old 02-26-2018
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Re: Seacock fall apart in my hands while removing....

Quote:
Originally Posted by RegisteredUser View Post

If it's only 1 part how does it harden? Or does it stay gooey?

Certainly looks the right size etc

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post #13 of 28 Old 02-26-2018
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Re: Seacock fall apart in my hands while removing....

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Originally Posted by MarkofSeaLife View Post
If it's only 1 part how does it harden? Or does it stay gooey?

Certainly looks the right size etc
Supposedly, it's play-dough for boats.
If you feel infringed upon, you go rub it.
I have it, but have never needed to use it.
I see it as a stop-gap tool, not a perm fix.
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post #14 of 28 Old 02-27-2018
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Re: Seacock fall apart in my hands while removing....

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Originally Posted by amwbox View Post


Don't leave home without it.
Or stuff a sock down the hole. Then you have plenty of time to decide what you want to do about it.
My biggest concern with sea-cocks is, if they are in location that is hard to reach. Had that in my last boat.
Not a good thing, really bothered me.
On my new boat I can easily access all of them, and I usually have a spare sock lying around
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post #15 of 28 Old 02-27-2018
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Re: Seacock fall apart in my hands while removing....

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Originally Posted by patricks View Post
The thru hull twisted off into the valve with a light half of a turn on the pipe wrench. Something that I could have easily done with my bare hands.

I guess my point is that they appeared fine and very solid but how many times do you really put pressure on the valves or handles? Maybe when there is a issue with them or you had a busy year with work and family, etc... and neglected them one season and they seem a little stubborn to open.
Just my opinion, it would not be wise to think that a 50 year old seacock will always be dependable, no matter who made it or what material it was molded with. It is only as strong as the weakest part.

Patrick
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If I'm reading this correctly, The Valve itself didn't fall apart, it sheered the threads on the thru-hull fitting ? Is the Valve intact?
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post #16 of 28 Old 02-27-2018
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Re: Seacock fall apart in my hands while removing....

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Originally Posted by patricks View Post
...I guess my point is that they appeared fine and very solid but how many times do you really put pressure on the valves or handles?...
I don’t understand this reasoning. Preventive maintenance should help avoid most problems. Should I change my bronze seacocks every 10 years just because? Or should I properly maintain them?
I always work the valves (open/close) and I take my seacocks apart for service every two years whenever possible.

You or the PO probably had an electrolysis problem as stated above.


Quote:
Originally Posted by amwbox View Post
Bronze does corrode. Materials do weaken with time and load cycles. Nothing lasts forever. Stray current could have done for it if nothing else.
Bronze seacocks if properly looked after and free or electrolysis will outlast any member on this forum.
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post #17 of 28 Old 02-27-2018
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Re: Seacock fall apart in my hands while removing....

I like to keep my seacock hard by doing regular maintenance on it.
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post #18 of 28 Old 03-01-2018
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Re: Seacock fall apart in my hands while removing....

Mark,

Davis used to market "seam sealant" for wood planked boats. It is nearly identical to plumber's wax at the hardware store for seating toilets. The wax ring is like $3.5 and stays sticky as hell about forever.

Kieran
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post #19 of 28 Old 03-04-2018
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Re: Seacock fall apart in my hands while removing....

Sounds like galvanic corrosion sucked the zinc out of the alloy and left brittle spongy metal. Sometimes you can tell that by the look and feel, sometimes not.

I think it definitely means you need to suspect every underwater fitting on the boat, and check them all for integrity. And check to see if you have any galvanic problems that might be causing this now as well.
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post #20 of 28 Old 03-04-2018 Thread Starter
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Re: Seacock fall apart in my hands while removing....

It looked like the thru hull walls was just weaken over time, as this is where the seacock immediately separated (metal twisted off) from the seacock. I disagree with everyone that I have a extensive problem with electrolysis as I replaced majority of the seacocks on the sailboat and this one, although it looked like it could have lasted another 5 to 10 years, twisted off at the thru-hull threads while the others, looked like worse but was quite solid once I finally was able to remove them.

I really did not mean to have this thread jump into other topics like maintenance, everyone's thoughts on how long or short a seacock should last, electrolysis, causes, etc... It was just to say that sometimes a part on your sailboat or anything else, looks solid and well maintain but the assembly was the weakest one out of the entire seacock replacements, including two that were marine plastic seacocks. Perhaps I did not word my original thread properly.

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