[Public-List] seacocks
Roger L. Kingsland
r.kingsland at ksba.com
Mon Jul 28 14:00:40 PDT 2008
J,
I certainly was interested when you mentioned an article on seacocks, but
when you also mentioned fiber orientation and lamination defects; wow, were
talking goose bumps at this end of cyber space! Seriously, thanks for
keeping us up to date. I need seacocks and can now do a better job of it.
All the best,
Roger
PS - does anyone know the sell price of the A30 that was on eBay. It had
sold before I logged on (for that matter, is there any way to research sold
items on eBay)
Roger Kingsland, Managing Partner
Kingsland Scott Bauer Associates
KSBA
________________________________
Architects/Planners/InteriorDesigners/ProjectManagers
3441 Butler Street
Pittsburgh, PA 15201
N 40° 27.8344' W79° 57.9831'
412-252-1500 ext.101
412-779-5101 cell
412-252-1510 fax
r.kingsland at ksba.com
www.ksba.com
-----Original Message-----
From: public-list-bounces at lists.alberg30.org
[mailto:public-list-bounces at lists.alberg30.org] On Behalf Of J Bergquist
Sent: Monday, July 28, 2008 12:01 PM
To: Alberg 30 Public List -- open to all
Subject: [Public-List] seacocks
There is a really great article about seacocks in the current issue of
Professional Boatbuilder magazine. You can find a digital copy of the
magazine (for free!) at:
http://www.proboat-digital.com/proboat/20080809/
I thought I knew something about seacocks. What I learned by reading this
article is that all of the seacocks in my boat are improper, which made me
think 2 things:
1. I should probably change them before too long.
2. They have lasted a long time as is. So maybe it's not the first thing
that I should do, and it does seem like it would be quite a job.
I am sure many folks reading this list already know the proper seacock
installation ABYC specification, but it was news to me so I assume there are
others out there who also didn't realize it. Basically, what I learned is
that bronze thru-hulls have straight NPS (not NPT) threads on them, which
means if you screw a standard ball valve (which normally has NPT threads),
only a few threads will register before you hit the taper. In reality, thru
hulls are supposed to be screwed into a seacock that has matching NPS
threads from the outside. The seacock gets pre-installed with lag screws so
that it is fixed and you use a special wrench to turn the thru-hull into the
seacock itself from outside the boat. This process is illustrated and
explained in the article.
Anyway, what I have is standard ball valves with NPT threads screwed onto
the ends of my thru-hulls. This is basically exactly wrong. I had no idea.
Apparently it is a common mistake made by do-it-yourselfers and even some
professionals. I thought my installations were correct because they were
ball valves instead of gate valves. But the proper ABYC-compliant
installation should have actual seacocks lag screwed to the backing block
and with the thru hull threaded all the way in from the outside.
I just thought there might be other folks out there who would find this
article interesting.
There is also a sweet article about fiber orientation and lamination defects
which is pretty cool.
Later,
J Bergquist
_______________________________________________
These businesses support your Association:
http://www.alberg30.org/store/A30supporters.html
Please support them.
_______________________________________________
Public-List mailing list
Public-List at lists.alberg30.org
http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
1217278840.0
More information about the Public-List
mailing list