THRU-HULL For my boat - SailNet Community
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post #1 of 28 Old 01-22-2018 Thread Starter
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THRU-HULL For my boat

So I need to change the Thru hulls in my boat what is the best material and best thru hulls ? Plastic, steel ,bronze?

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post #2 of 28 Old 01-22-2018 Thread Starter
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Re: THRU-HULL For my boat

I heard Groco is a nice brand
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Re: THRU-HULL For my boat

You season sailors does this article make sense or have merit
https://www.sailfeed.com/2013/10/no-...-and-seacocks/
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Re: THRU-HULL For my boat

Nothing wrong with good quality bronze stuff. Check out the advice on Maine Sail's great site.

You used the word "plastic" but there are none (or should be none) made solely out of plastic.

Equivalent to bronze in strength are the composite ones from Forespar, and you want the one-piece "93 series" valves. Strong and never any concern about electrolysis.

If you go with bronze, go with a name brand, to be sure of getting a true marine alloy.

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post #5 of 28 Old 01-22-2018
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Re: THRU-HULL For my boat

A good quality bronze thruhull with a real bronze seacock (not a ball valve), from a reputable manufacturer like Groco or Perko would be my choice. Also keep in mind that if you have a cored hull, you must make sure that there is no core where the thruhull goes through the hull. If necessary, dig out the core around the hole and fill that space with epoxy putty so when you tighten the thruhull, you are doing it against a hard surface, not the soft care material of the hull.
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post #6 of 28 Old 01-23-2018
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Re: THRU-HULL For my boat

Composite(plastic) thru hulls will not corrode, but I understand they do degrade over time. Some brands are similar in breaking strength to bronze, others aren't. I can't keep them straight.

Quality bronze thru-hulls and valves (Groco, Perko), when properly installed, will outlast the owner. Note: crappy chrome coated ball valves, often OEM on some production boats, are not the same. I'm slowly changing all mine out.

Steel is silly.

That's my story and I'm sticking to it.


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post #7 of 28 Old 01-23-2018
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Re: THRU-HULL For my boat

TruDesign is an option.
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post #8 of 28 Old 01-23-2018
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Re: THRU-HULL For my boat

Are you sure you need to change all of the thru hulls? Would be curious to hear what problems you're having that require changing them out.......

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post #9 of 28 Old 01-23-2018 Thread Starter
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Re: THRU-HULL For my boat

Quote:
Originally Posted by RegisteredUser View Post
TruDesign is an option.
The guy from SAILLIFE on youtube is using these in his warrior 38 apparently they have won awards. I will read into it Thanks.
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Re: THRU-HULL For my boat

Quote:
Originally Posted by bigdogandy View Post
Are you sure you need to change all of the thru hulls? Would be curious to hear what problems you're having that require changing them out.......
They are plastic so I was told that plastic is no good and I need to change them.

The person that told me that has like 30 years in the business of boat repair.

So I guess thats my only reason they are not having any issues...

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