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Quality Bronce Thru Hulls with ball valves???

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Quality Bronce Thru Hulls with ball valves???

Old 08-03-2017, 06:36 AM
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Default Quality Bronce Thru Hulls with ball valves???

Any body have a recommended brand for Marine bronze through-hulls?
I am putting together a list of must haves for a reliable boat...
Thanks and I will do some searches and if I find my own answers, I will post..
Old 08-03-2017, 11:04 AM
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Other quality sources:


Apollo Marine http://www.apollovalves.com/products/by_category/#cat-7
Gemlux http://www.gemlux.com/catalog/plumb
Buck Algonquin http://www.buckalgonquin.com/valves/
Old 08-03-2017, 11:34 AM
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Proper word would be "seacock" do not use a ball valve with a thru hull below the water line, the inside thickness of the thread is the wall thickness of the attaching nipple.
Old 08-03-2017, 12:04 PM
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Groco is top of the line bulletproof construction.
Old 08-03-2017, 12:06 PM
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Awesome thanks for all the info.
I appreciate it.
Old 08-03-2017, 12:06 PM
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Originally Posted by blackfinmike View Post
Proper word would be "seacock" do not use a ball valve with a thru hull below the water line, the inside thickness of the thread is the wall thickness of the attaching nipple.
Mike can you clarify this? Are you saying not to use a thru hull in place of a seacock? Just confused by your wording.
Old 08-03-2017, 12:28 PM
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A ball valve and a seacock are very similar (twisting handle shut-off), but there is something different about a seacock that is safer for below-waterline use. Personally not sure what it is...

Google to the rescue: http://www.boattest.com/view-news/32...important-gear
Old 08-03-2017, 12:32 PM
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Originally Posted by BLUESMAN View Post
Mike can you clarify this? Are you saying not to use a thru hull in place of a seacock? Just confused by your wording.
Yes, Do not use a straight thread thru hull fitting/tapered thread ball valve as a replacement for a seacock.

You will need a mushroom thru hull or scoop thru hull fitting with the seacock. Cut it to length and use a backing plate under the seacock.

The seacock has straight threads inside it so the thru hull fitting can be cut to length depending on the thickness of the hull. A ball valve has tapered threads which will not properly tighten on a straight threaded thru hull fitting.
Old 08-03-2017, 12:32 PM
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Most thruhulls are threaded with NPS while most ball valves are NPT. Some companies, such as Gemlux, do make thruhulls with a portion of NPT threads. These would be safe to use with a ball valve.

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