Thru-hulls, ball valves, seacocks
49 views
Skip to first unread message
Tim F
May 9, 2011, 4:47:53 PM5/9/11
to The Islander 29 project
I haven't posted since last summer, but our I29 restoration project
continues even though every move we make creates three times as much
work as we expected. Regardless, we continue working. We're still
hoping to get her into Lake Ontario this summer, but have only just
started ripping apart the starboard side. The new port side (head,
dinette, etc.) goes back in next week (fingers crossed). And, if we're
lucky the A4 we rebuilt will actually start!
My question - as you can see, we're getting ready to reassemble at
least some parts of our boat, but are having some trouble with
plumbing. Our I29 came with thru-hulls connected to gate valves. We
were originally going to do almost the same thing (except replace the
gate valves with ball valves), but have concerns. Some thoughts:
1) The bronze ball valves we can find are only NPT threads, while our
thru-hulls are (of course) NPS.
2) We might use tri-flange adaptors to get from NPS to NPT so we can
use ball valves.
3) Two of our thru-hulls are 1/2". I cannot find flanged adaptor or
seacocks or thru hulls for this size anywhere.
4) I can find marelon ball valves (NPS) in 1/2".
5) We have read not to use marelon with bronze.
Any help from anyone who has redone their thru-hulls would be greatly
appreciated!!!
Thanks, in advance,
Tim (& Bill and Steve)
continues even though every move we make creates three times as much
work as we expected. Regardless, we continue working. We're still
hoping to get her into Lake Ontario this summer, but have only just
started ripping apart the starboard side. The new port side (head,
dinette, etc.) goes back in next week (fingers crossed). And, if we're
lucky the A4 we rebuilt will actually start!
My question - as you can see, we're getting ready to reassemble at
least some parts of our boat, but are having some trouble with
plumbing. Our I29 came with thru-hulls connected to gate valves. We
were originally going to do almost the same thing (except replace the
gate valves with ball valves), but have concerns. Some thoughts:
1) The bronze ball valves we can find are only NPT threads, while our
thru-hulls are (of course) NPS.
2) We might use tri-flange adaptors to get from NPS to NPT so we can
use ball valves.
3) Two of our thru-hulls are 1/2". I cannot find flanged adaptor or
seacocks or thru hulls for this size anywhere.
4) I can find marelon ball valves (NPS) in 1/2".
5) We have read not to use marelon with bronze.
Any help from anyone who has redone their thru-hulls would be greatly
appreciated!!!
Thanks, in advance,
Tim (& Bill and Steve)
Bill Wiltsey
May 10, 2011, 7:40:27 AM5/10/11
to the-islande...@googlegroups.com, Trent Sanders
Tim,
I purchased my I29 CIMBA from Trent who replaced the thru-hulls. He
probably can help and is Cc'd on this e-mail.
Also, by coincidence, although I and CIMBA are in San Diego, I am
currently on business near Rochester and staying in a house on Sodus
Point. Are you and your I29 nearby? Can I go visit your boat?
Good luck with your project and I hope Trent can help.
Bill
> --
> You received this message because you are subscribed to the Google
> Groups "The Islander 29 project" group.
> To post to this group, send email to
> the-islande...@googlegroups.com.
> To unsubscribe from this group, send email to
> the-islander-29-p...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/the-islander-29-project?hl=en.
rustysteel
May 10, 2011, 10:38:11 AM5/10/11
to The Islander 29 project
I believe gate valves are not NPS and they were used on tons of thru-
hulls in the 60's and 70's? I believe most ball valves are not NPS
either and yet there are tons of them threaded directly on thru-hulls?
It seems there are a lot of NPT female fittings threaded on the NPS
male thru-hulls over the years with no leaks and no failures? I'm not
saying it is right but it does appear to "work"?
No worries, Scott
hulls in the 60's and 70's? I believe most ball valves are not NPS
either and yet there are tons of them threaded directly on thru-hulls?
It seems there are a lot of NPT female fittings threaded on the NPS
male thru-hulls over the years with no leaks and no failures? I'm not
saying it is right but it does appear to "work"?
No worries, Scott
Reply all
Reply to author
Forward
0 new messages