Flush mount thru hull fittings - SailNet Community
 1Likes
Reply
 
LinkBack Thread Tools
post #1 of 13 Old 02-13-2014 Thread Starter
formerly 'BoatyardBoy'
 
SailRedemption's Avatar
 
Join Date: Jun 2013
Location: NOLA
Posts: 514
Thanks: 167
Thanked 16 Times in 16 Posts
Rep Power: 4
 
Flush mount thru hull fittings

I recently bought a Kaufman 47 sailboat and will be changing the 14 thru hulls and seacocks. There are flush mount fittings on there now and I want to replace with the same thing. Groco has flush mount fittings but the are for over waterline use. I called them and they said that's what they recommend but they can be used below as long as "you know what your doing".

That being said, does anyone know of anywhere they sell bronze flush mount fittings?

As a precursor, I don't want marelon.

Sent from my HTC6500LVW using Tapatalk
SailRedemption is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 13 Old 02-13-2014
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,771
Thanks: 1
Thanked 57 Times in 57 Posts
Rep Power: 10
 
Re: Flush mount thru hull fittings

Jamestown Distributors.

Valiant 32
Barquito is online now  
Quote Quick Reply Share with Facebook
post #3 of 13 Old 02-13-2014
Senior Member
 
Maine Sail's Avatar
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 6,400
Thanks: 22
Thanked 303 Times in 235 Posts
Rep Power: 18
       
Re: Flush mount thru hull fittings

Good luck with this search, especially on a boat possibly built in Taiwan.....

Problem is that years ago there were piles of companies making flush mount thru-hulls and they all varied in size and diameter of the head depending upon brand. Companies like Wilcox-Crittenden, and many others, are now long gone.. Many Taiwan built boats often used American fittings, like some Grand Banks etc., but then some Taiwan yards sourced stuff locally. These locally sourced fittings were usually not built to the same head shape or size as anything else. BTDT....

Today Spartan, Buck Algonquin and Groco are the only ones left that I know of still making a "quality" 85-5-5-5 bronze thru-hull fitting in flush mount.

You may want to be VERY, VERY careful in the extraction process. Then clean them up, inspect for corrosion, and re-use them. If they were good quality bronze to begin with it will be very likely they are in perfect shape.

I have a box of seacocks from the mid 1930's that came out of an old wooden boat during a re-fit in 2003 that are still in perfect working order after being in use for approx 70 years... They literally outlasted the hull.....

______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




Images In Posts Property of Compass Marine Inc.



Last edited by Maine Sail; 02-13-2014 at 11:58 AM.
Maine Sail is offline  
Quote Quick Reply Share with Facebook
 
post #4 of 13 Old 02-13-2014
Captain S/V Triumph
 
DougSabbag's Avatar
 
Join Date: Aug 2011
Location: Boston Yacht Haven
Posts: 802
Thanks: 4
Thanked 8 Times in 7 Posts
Rep Power: 6
 
Re: Flush mount thru hull fittings

As an additional thought:

Most racing sailors have learned the value of a smooth bottom. Ironically, cruising sailors can benefit at least as much from the creation of a low-resistance bottom as racing sailors, although you rarely see a cruising or daysailing boat with a bottom to match that of a good racing boat. Why handicap a cruising boat, which is probably already underpowered in light air, by having a bottom which almost guarantees reduced performance in the lightest conditions? Almost any tub can be driven to hull speed with 20 knots of breeze, even if it has foot-long grass and an acre of barnacles on the bottom. But it takes a smooth bottom to help it along in a three knot zephyr.

You can begin along the path to a fast bottom by recessing or fairing in through hull fittings that protrude beyond the surface of the hull, particularly in the forward half of the boat. Typically, this means the head intake and discharge fittings.

Whether you decide to recess fittings or fair them in depends on the hull construction, the amount of money you want to spend, and the amount of time you want to spend.
DougSabbag is offline  
Quote Quick Reply Share with Facebook
post #5 of 13 Old 02-13-2014 Thread Starter
formerly 'BoatyardBoy'
 
SailRedemption's Avatar
 
Join Date: Jun 2013
Location: NOLA
Posts: 514
Thanks: 167
Thanked 16 Times in 16 Posts
Rep Power: 4
 
Re: Flush mount thru hull fittings

Quote:
Originally Posted by Maine Sail View Post
Good luck with this search, especially on a boat possibly built in Taiwan.....

Problem is that years ago there were piles of companies making flush mount thru-hulls and they all varied in size and diameter of the head depending upon brand. Companies like Wilcox-Crittenden, and many others, are now long gone.. Many Taiwan built boats often used American fittings, like some Grand Banks etc., but then some Taiwan yards sourced stuff locally. These locally sourced fittings were usually not built to the same head shape or size as anything else. BTDT....

Today Spartan, Buck Algonquin and Groco are the only ones left that I know of still making a "quality" 85-5-5-5 bronze thru-hull fitting in flush mount.

You may want to be VERY, VERY careful in the extraction process. Then clean them up, inspect for corrosion, and re-use them. If they were good quality bronze to begin with it will be very likely they are in perfect shape.

I have a box of seacocks from the mid 1930's that came out of an old wooden boat during a re-fit in 2003 that are still in perfect working order after being in use for approx 70 years... They literally outlasted the hull.....
Alright, thanks I'll do my best to take them out carefully but no guarantees. But if there is a recessed/beveled hole already
there, I don't see why a new Groco or Buck(I found them thanks for the brand drop) wouldn't work in the same hole. It would be a matter of re bedding them with some inhouse made resin/glass puddy or 5200..




Quote:
Originally Posted by DougSabbag View Post
As an additional thought:

Most racing sailors have learned the value of a smooth bottom. Ironically, cruising sailors can benefit at least as much from the creation of a low-resistance bottom as racing sailors, although you rarely see a cruising or daysailing boat with a bottom to match that of a good racing boat. Why handicap a cruising boat, which is probably already underpowered in light air, by having a bottom which almost guarantees reduced performance in the lightest conditions? Almost any tub can be driven to hull speed with 20 knots of breeze, even if it has foot-long grass and an acre of barnacles on the bottom. But it takes a smooth bottom to help it along in a three knot zephyr.

You can begin along the path to a fast bottom by recessing or fairing in through hull fittings that protrude beyond the surface of the hull, particularly in the forward half of the boat. Typically, this means the head intake and discharge fittings.

Whether you decide to recess fittings or fair them in depends on the hull construction, the amount of money you want to spend, and the amount of time you want to spend.
Was that a quote you found, I read that somewhere in a pdf I downloaded.. I think. But like I said, I'll probably just take them out and see what I can do. My family owns the yard and the work is no where foreign to me. I just want it done and done correctly. I want to sail this thing this summer Haha!

Sent from my HTC6500LVW using Tapatalk
SailRedemption is offline  
Quote Quick Reply Share with Facebook
post #6 of 13 Old 02-13-2014
islander bahama 24
 
newhaul's Avatar
 
Join Date: Feb 2010
Location: bremerton wa
Posts: 1,837
Thanks: 7
Thanked 61 Times in 61 Posts
Rep Power: 8
 
Re: Flush mount thru hull fittings

You may be able to source a place for a bronze shakewell type seacock when closed they provide a smooth surface with no protrusion or hole in the hull surface

Illegitimus Non Tatum Carborundum.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
newhaul is offline  
Quote Quick Reply Share with Facebook
post #7 of 13 Old 02-13-2014
Captain S/V Triumph
 
DougSabbag's Avatar
 
Join Date: Aug 2011
Location: Boston Yacht Haven
Posts: 802
Thanks: 4
Thanked 8 Times in 7 Posts
Rep Power: 6
 
Re: Flush mount thru hull fittings

Quote:
Originally Posted by newhaul View Post
You may be able to source a place for a bronze shakewell type seacock when closed they provide a smooth surface with no protrusion or hole in the hull surface
Interesting item! I did a Google on a 'shakewell' seacock, and found some on-line at a place called Fisheries Supply.

Apparently they are fit in so tightly they don't have an exterior flange at all...?

Very interesting.....
DougSabbag is offline  
Quote Quick Reply Share with Facebook
post #8 of 13 Old 02-14-2014
islander bahama 24
 
newhaul's Avatar
 
Join Date: Feb 2010
Location: bremerton wa
Posts: 1,837
Thanks: 7
Thanked 61 Times in 61 Posts
Rep Power: 8
 
Re: Flush mount thru hull fittings

Quote:
Originally Posted by DougSabbag View Post
Interesting item! I did a Google on a 'shakewell' seacock, and found some on-line at a place called Fisheries Supply.

Apparently they are fit in so tightly they don't have an exterior flange at all...?

Very interesting.....
Yep and they provide a smooth hull when closed and here's the real kicker fisheries supply is less than fifteen miles from me by water.

Illegitimus Non Tatum Carborundum.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
newhaul is offline  
Quote Quick Reply Share with Facebook
post #9 of 13 Old 02-14-2014
Tundra Down
 
downeast450's Avatar
 
Join Date: Jan 2008
Location: Seal Harbor, Maine
Posts: 1,290
Thanks: 51
Thanked 21 Times in 20 Posts
Rep Power: 10
 
Red face Re: Flush mount thru hull fittings

Quote:
Originally Posted by BoatyardBoy View Post
Alright, thanks I'll do my best to take them out carefully but no guarantees. But if there is a recessed/beveled hole already
there, I don't see why a new Groco or Buck(I found them thanks for the brand drop) wouldn't work in the same hole. It would be a matter of re bedding them with some inhouse made resin/glass puddy or 5200..
I did just that. I made sure (I used 4200), the 4200 thoroughly bedded and sealed the joint. I carefully removed the 4200 that was not involved in the joint. There was some because the old fitting was a different size. I used an exacto knife for that step and cleaned up with a small wire brush. I taped over the opening in the fitting and with some vinylester putty (cabosil for thixotrophy and microbaloons for filler) I added a "sacrifical" surface patch of 8 oz s-glass then let it cure and faired it all very carefully. I made sure I had some surface of the fitting clean and "rough" at the outer edge so the fairing materials would have a surface to bond to. It ended up "recessing" the new fitting enough that the "sacrifical"glass remained right up to the openings. She is some smooth now and it has survived as I had hoped for three seasons. Great care at the edge of the opening to make sure it is well bonded. I could have skipped the "sacrifical" glass and added some chopped glass to my putty for strength.

How many of these are you working on? It would make sense to get them all ready for the "fairing step" then get them all done at once. The 4200 cures fairly quickly and can be carefully carved. It will allow removal of the fitting with less difficulty in the future.

Have fun.

Down

Islander-28, Marshall Sandpiper

Last edited by downeast450; 02-14-2014 at 03:16 AM.
downeast450 is offline  
Quote Quick Reply Share with Facebook
post #10 of 13 Old 02-15-2014
Senior Member
 
Join Date: Aug 2006
Location: Nantucket
Posts: 270
Thanks: 1
Thanked 6 Times in 6 Posts
Rep Power: 11
 
Re: Flush mount thru hull fittings

I replaced four of our bronze wilcox crittendon (1970's era) with Spartan flush mount thru-hulls found here Bronze and Stainless Marine Hardware - Spartan Marine Hardware and Accessories | Robinhood Marine Center the flush mount matched the original recessed area in the hull. As Maine Sail pointed out not sure about the foreign boat though...I think Spartan is the way to go. Buy one and see how it fits. I would stay away from 5200. As others have pointed out use 4200 or a sika brand adhesives and sealants found here http://www.jamestowndistributors.com/
ambianceack is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Flush Mount Ventilators Kielanders General Discussion (sailing related) 10 12-15-2013 10:33 PM
Tips for cutting hole for flush mount through-hull josrulz Gear & Maintenance 28 04-22-2013 10:50 AM
flush mount And removable? xymotic Electronics 3 12-09-2012 05:03 PM
flush mount bolts? johnnyandjebus Gear & Maintenance 4 04-22-2010 10:22 AM
Garmin Flush Mount kit concerns DropTop Gear & Maintenance 12 07-16-2009 01:55 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome