Thru-hulls, seacocks, and hoses! - SailNet Community
 2Likes
Reply
 
LinkBack Thread Tools
post #1 of 12 Old 12-16-2015 Thread Starter
Junior Member
 
Join Date: Dec 2015
Posts: 5
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Thru-hulls, seacocks, and hoses!

Ok, I'm working on overhauling my Bristol 29.9. I'm replacing pretty much all of of the thru-hulls, seacocks, and all of the ancient plumbing. I want to run this by you all and gather some opinions.

For the seacocks, I'm basically planning to do what Compass Marine recommends at Replacing Thru-Hulls and Seacocks Photo Gallery by Compass Marine How To at pbase.com. Groco says to use 316 stainless bolts or lags. I'm not sure whether to bolt through the hull from the outside, lag into backing blocks from the inside, or purchase Groco backing blocks and bolt into the hex nuts. Thoughts?

And hoses...oh hoses. I've been agonizing over the options for hoses and think I have it figured out:

- For the 3/4" freshwater system (non-pressurized), I'm planning on using Trident Marine Reinforced PVC Water Hose, likely from Discount Marine Supplies.

- For the 1 1/2" sewage lines, Trident 101. ~22ft. Any leads on the best place to buy this?

- For the 3/4" holding tank vent line, Trident 148.

- For the 1 1/2" cockpit scuppers drains and sink drains, also Trident 101. ~10ft. I know these don't need to be odor safe, but I can figure out a better (ie cheaper) hose to use that's still adequate for critical below the waterline use.

- For the 1 1/2" potable fill lines and manual bilge pumpout, Trident 148 or 144. ~20ft.

- For the 1 1/8" automatic bilge, Trident 148 or 144.

Looks like it's easy to buy 50' lengths of Trident hose at a good price from Discount Marine. I'm wary of Shields after reading reviews, etc but it's definitely easier to go to WM and buy shorter lengths of the equivalent Shields hoses. Thoughts?

I'll take any thoughts, suggestions, or other ideas!

Thanks!
Phil
pmagistro is offline  
Sponsored Links
Advertisement
 
post #2 of 12 Old 12-16-2015
Daniel - Norsea 27
 
Rhapsody-NS27's Avatar
 
Join Date: Apr 2012
Location: Me: VA Boat: Deale, MD
Posts: 1,235
Thanks: 127
Thanked 59 Times in 53 Posts
Rep Power: 8
 
Re: Thru-hulls, seacocks, and hoses!

The Compass Marine site is a good one to go off of. A Sailnet member, Maine Sail is the one behind that site. Look through the older posts here and you can find a wealth of info from just him alone.

I have replaced one seacock so far and about to do 5 more. The way I did the bolts (bronze) was to counter sink within the backer board, epoxied into place, then epoxied to the hull. The one I did was for the raw water intake for engine cooling. Everything worked out just fine. Whether to go through the hull with the bolts would depend on location. My locations are at the curve of the hull toward the keel, but if you have a fairly flat area of the hull, then you could go either way, I think.

Daniel
1981 Nor'sea 27,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Quote:
Who is staring at the sea is already sailing a little.
-Paul Carvel
Rhapsody-NS27 is online now  
post #3 of 12 Old 12-16-2015
Senior Member
 
Bleemus's Avatar
 
Join Date: Oct 2015
Location: Fl
Posts: 1,368
Thanks: 29
Thanked 51 Times in 51 Posts
Rep Power: 4
 
Re: Thru-hulls, seacocks, and hoses!

Where did you see Groco saying to use Stainless bolts?


Sent from my iPad using Tapatalk

Keth

Boat Vinyl Lettering and Graphics
Bleemus is offline  
 
post #4 of 12 Old 12-16-2015
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 3,180
Thanks: 9
Thanked 90 Times in 89 Posts
Rep Power: 9
 
Re: Thru-hulls, seacocks, and hoses!

Surely bronze fasteners would be ideal? They would be the same material as the seacock base, so there would be no galvanic corrosion.
Rhapsody-NS27 likes this.

Bristol 31.1, San Francisco Bay
MarkSF is offline  
post #5 of 12 Old 12-16-2015 Thread Starter
Junior Member
 
Join Date: Dec 2015
Posts: 5
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Thru-hulls, seacocks, and hoses!

Quote:
Originally Posted by Bleemus View Post
Where did you see Groco saying to use Stainless bolts?


Sent from my iPad using Tapatalk
I called and talked with them today, and the fellow said that 316 stainless or bronze are both fine materials. I think I'll go with bronze; they have all the possible bronze bolts/screws I could want at Fawcetts.
pmagistro is offline  
post #6 of 12 Old 12-16-2015
Senior Member
 
Bleemus's Avatar
 
Join Date: Oct 2015
Location: Fl
Posts: 1,368
Thanks: 29
Thanked 51 Times in 51 Posts
Rep Power: 4
 
Thru-hulls, seacocks, and hoses!

You called Groco and they said that or did you just talk to a chandlery?

MaineSail where are you when we need you!

Sent from my iPad using Tapatalk

Keth

Boat Vinyl Lettering and Graphics
Bleemus is offline  
post #7 of 12 Old 12-16-2015 Thread Starter
Junior Member
 
Join Date: Dec 2015
Posts: 5
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Thru-hulls, seacocks, and hoses!

I called Groco directly.
pmagistro is offline  
post #8 of 12 Old 12-16-2015
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,550
Thanks: 23
Thanked 53 Times in 51 Posts
Rep Power: 9
 
Re: Thru-hulls, seacocks, and hoses!

What are the problems with Shields hose?

In the beginning, there was only water...
casey1999 is offline  
post #9 of 12 Old 12-16-2015
Senior Member
 
Join Date: May 2007
Location: Toronto, Canada
Posts: 517
Thanks: 0
Thanked 31 Times in 31 Posts
Rep Power: 13
 
Re: Thru-hulls, seacocks, and hoses!

Quote:
Originally Posted by pmagistro View Post
...For the 1 1/2" sewage lines, Trident 101. ~22ft. Any leads on the best place to buy this?

- For the 3/4" holding tank vent line, Trident 148...
Phil

I re-plumbed the entire head including changing all hoses and a head rebuild last year. I bought all the hoses from Hopkins Carter Marine (Hopcar is a member here). His prices are very competitive and he can get most of what you need for this job including the Awab hose clamps that you'll need quite a few....
Not affiliated in any way, just a satisfied customer.
SVTatia is offline  
post #10 of 12 Old 12-16-2015
Senior Member
 
fallard's Avatar
 
Join Date: Nov 2009
Location: Mystic
Posts: 2,265
Thanks: 14
Thanked 79 Times in 78 Posts
Rep Power: 10
 
Re: Thru-hulls, seacocks, and hoses!

Quote:
Originally Posted by Bleemus View Post
You called Groco and they said that or did you just talk to a chandlery?

MaineSail where are you when we need you!

Sent from my iPad using Tapatalk
If you look at the photos in the OP's link to Maine Sail, you will see bronze bolts through the bronze flange.
fallard is online now  
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











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
Through hulls and hoses Gregrosine General Discussion (sailing related) 6 04-24-2013 05:44 AM
thru-hulls without seacocks? robbieland Gear & Maintenance 8 01-27-2013 07:20 PM
Of thru-hulls and seacocks... utchuckd Gear & Maintenance 3 08-06-2012 04:48 PM
Replacing seacocks and through hulls. davewild Gear & Maintenance 8 03-04-2010 11:48 AM
New thru-hulls/seacocks ereuter Gear & Maintenance 27 05-07-2007 06:31 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