Decommissioning through hulls? - Page 2 - SailNet Community
 8Likes
Reply
 
LinkBack Thread Tools
post #11 of 20 Old 01-30-2013
Señor Member
 
PorFin's Avatar
 
Join Date: Sep 2007
Posts: 1,446
Thanks: 8
Thanked 20 Times in 20 Posts
Rep Power: 8
 
Re: Decommissioning through hulls?

They don't call them "best practices" for nothing -- I don't think Stumble's solution would qualify.

Med -- I think your plug idea will work fine. Good joint compound on the threads, and then close the seacock and remove the handle. You'll still want to exercise it periodically, so keep the handle available.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
________
'85 BYB Vagabond 39
PorFin is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 20 Old 01-30-2013
Senior Member
 
fryewe's Avatar
 
Join Date: Dec 2004
Posts: 1,685
Thanks: 31
Thanked 52 Times in 52 Posts
Rep Power: 11
 
Re: Decommissioning through hulls?

I think I would plug it as you are thinking but leave the valve open after it is plugged and exercise it open and shut occasionally. If left shut the downstream side will likely fill with water due to seat leakage and there is a slight possibility of overpressure with temp changes or damage due to freezing. The properly installed plug (tape or pipe dope on the threads) will not leak inboard and is plenty strong - likely stronger than the hull.
RobGallagher likes this.
fryewe is offline  
Quote Quick Reply Share with Facebook
post #13 of 20 Old 01-30-2013
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,512
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
Re: Decommissioning through hulls?

Quote:
Originally Posted by misfits View Post
The proper way to do this.

Duct tape & plastic over thru hull hole inside the boat. Grind back the hull on an angle, 4+" around the thru hull. Cut fiberglass mat in circles, each one a little smaller than the next. Start w/ the largest & keep pilling on the smaller patches in sequence. Once you're at the desired thickness, slap the fairing compound on.
Most mat is not compatible with epoxy. Biaxial roving is a good choice as would be heavier fiberglass cloth. As posted by others the epoxy only plug is not a very good method. The proper method is shown below. Note that the largest patch is put on first. This eliminates the chance of sanding through it during finishing weakening the repair.
Attached Thumbnails
Glassing hole.jpg  
Gary M likes this.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #14 of 20 Old 02-08-2013
Senior Junior Member
 
Join Date: Jun 2012
Location: Montpelier, Vermont
Posts: 25
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
 
Re: Decommissioning through hulls?

My wife and I have done a lot of fiberglass hull repairs on our boats. It's not rocket science. There are a lot of good books on the subject that can take you through the process step by step, follow them closely, but don't be anal about it. Don't be impatient (let the layers cure). Don't skimp (especially on the hole size preparation). And above all recognize that you can rectify a mistake.

Having said all that, I'd say your in good shape leaving the seacocks in place, giving them a good greasing before closing and plugging them. It wouldn't hurt to even exercise them on occasion.

The only reason I'd leave them in is potential resale. No matter how good some people feel about composting toilets, others don't have the same warm and fuzzy felling about them. If you're looking to sell the boat later on the ability to convert back, if the new owner so chooses, is a selling point.
Watercolor is offline  
Quote Quick Reply Share with Facebook
post #15 of 20 Old 02-08-2013
Learning the HARD way...
 
eherlihy's Avatar
 
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Posts: 4,091
Thanks: 159
Thanked 110 Times in 107 Posts
Rep Power: 9
 
Re: Decommissioning through hulls?

I'm thinking of pulling my old through hull transducer, and going the fiberglass & epoxy route. I replaced the old Signet depth sounder and 1¼" transducer with a Garmin fishfinder. I mounted the new transducer inside the hull on a bed of silicone glue. Works great!

Can anyone think of any reason why I might want to leave the 1¼" hole?


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

USCG Licensed OUPV Captain, ASA 101/103/104/105/106/118 Instructor - Also certified in Marine Electrical Systems


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
eherlihy is offline  
Quote Quick Reply Share with Facebook
post #16 of 20 Old 02-09-2013
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,512
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
Re: Decommissioning through hulls?

No.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #17 of 20 Old 02-09-2013
Senior Member
 
Join Date: Feb 2008
Posts: 150
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 8
 
Re: Decommissioning through hulls?

I was given advice that is a blend of the above. Grind/bevel the hole. Duct tape the outside. Mix up some Fiber Hair and fill from inside. Cover inside and out with fiberglass cloth. Makes a nice, strong sandwich.

I've done this a handful of times over the years with god results.
SkywalkerII is offline  
Quote Quick Reply Share with Facebook
post #18 of 20 Old 02-09-2013
Senior Member
 
Join Date: Jan 2011
Location: Maine
Posts: 761
Thanks: 0
Thanked 28 Times in 28 Posts
Rep Power: 5
 
Re: Decommissioning through hulls?

The term Best Practices comes into play

BEST - Hull ground outside and inside, glass replaced on both sides
GOOD - Hull ground on inside, glass replaced
MARGINAL - Epoxy in hole.

Since the epoxy is a different density and flexibility than the surrounding glass, the edges will be under greater stress and will want to shear or tear. Will it happen? I don't know. This method would probably work fine, but I'd stay with time proven methods if you go far offshore. Pick up a book by Don Casey. Easy read, step-by-step. Even a Geico advertising icon could do it.
Watercolor likes this.
DonScribner is offline  
Quote Quick Reply Share with Facebook
post #19 of 20 Old 02-09-2013 Thread Starter
Closet Powerboater
 
MedSailor's Avatar
 
Join Date: Mar 2008
Location: Anacortes PNW
Posts: 3,579
Thanks: 258
Thanked 112 Times in 101 Posts
Rep Power: 8
 
Re: Decommissioning through hulls?

For the record I'm not considering the epoxy in the through-hull idea. I don't see the advantage over the pipe plug.

I'm leaning towards the pipe plug and leaving the through hulls in place for 2 reasons. First I might use them again. Second, I think my first real fiberglass job shouldn't be on the under-side of my hull.

Perhaps at the next haul-out, or the one after, I'll have a better idea of which ones I want to keep and I may have a few "above the waterline" fiberglass projects already completed.

MedSailor

I have a sauna on my boat, therefore I win.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MedSailor is offline  
Quote Quick Reply Share with Facebook
post #20 of 20 Old 02-09-2013
Senior Junior Member
 
Join Date: Jun 2012
Location: Montpelier, Vermont
Posts: 25
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
 
Re: Decommissioning through hulls?

Sounds like a plan. Just check them like you would any other seacock/thru-hull you have.
Watercolor 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
New thru hulls .. is this ok? smp Gear & Maintenance 27 04-11-2012 05:10 PM
"Decommissioning" a holding tank dmcgraw Gear & Maintenance 7 10-25-2010 01:32 PM
Decommissioning a boat fffrick General Discussion (sailing related) 19 02-10-2009 12:11 AM
Through-Hulls kwaltersmi Gear & Maintenance 3 08-29-2007 05:43 PM

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