Seacock warning, probably most relevant to Australians

[s/v Jedi]

Originally Posted by Dockhead

I'm open minded about this but I'm not seeing it.


In MaineSail's testing, the threaded neck breaks off, just as you would expect. The nut stays in place and the skin fitting stays in place.


Attachment 207732
https://marinehowto.com/seacock-failure-testing/


The flanged adaptor has exactly the same threaded neck. Why would it fail any differently? What difference would it make?

The test shows the skin fitting breaking. This happens every time, like I wrote. Now you have an open hole to close.

The tapered threaded stud on a flanged adapter is much, much stronger than a skin fitting. I do not believe there is a documented case of it breaking. The wall is thicker and threads engage deeper. This is why it is recommended by anyone who worked with both.
Is a flanged seacock better? Probably. It would suit Swan and Contest to use them. Is it so much better to be that more expensive? I don’t think so, and I don’t think anyone who has all go through their hands would opt for something else than the flanged adapter when it’s their wallet paying the bill

I have a Groco flanged seacock forward, but the flanged adapter everywhere else.