Groco Flange Adaptor? - SailNet Community

   Search Sailnet:

 forums  store  

Quick Menu
Boat Reviews  
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Hatches and Portlights
Interior And Galley
Marine Electronics
Other Items
Plumbing and Pumps
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here

Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
Old 07-27-2008
danielgoldberg's Avatar
Senior Member
Join Date: Feb 2008
Location: New York
Posts: 679
Thanks: 0
Thanked 3 Times in 2 Posts
Rep Power: 7
danielgoldberg is on a distinguished road
Groco Flange Adaptor?

Anyone use these? Essentially, it's a fitting that screws onto a standard NPS throughull, but it allows you then to screw on an NPT ball valve. It's supposedly a way to make a proper seacock setup without having to buy all new valves, which of course gets pricey. Our B49, like so many boats, comes with inline ball valves threaded right to the throughull, so there is no flange, there's a mismatch between the NPS and NPT threads, etc. One of my planned upgrades was to take out all the throughhulls and valves, and replace them all with Marelon seacocks. With the Groco adapter, however, I could do the project by "just" unscrewing the existing valves, gluing on a wood backing plate with the proper size hole cut in, cut the through hull pipe to size, screw on the flanged adaptor, screw that into the wood backing plate, then screw on the valve. No more labor intensive than swapping out the through hulls (quite a bit less actually), and the hardware cost would be substantially less (the adaptors seems to go for about $30 to $45 each, depending on size, as opposed to north of $100 for a flanged seacock).

Anyone have experience with this?
Dan Goldberg

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
Old 07-27-2008
Maine Sail's Avatar
Senior Member
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,576
Thanks: 13
Thanked 154 Times in 120 Posts
Rep Power: 16
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice

Yes and they are GREAT !! If a valve goes bad, which they eventually will, simply un-thread it and thread another on. No disrupting the flange/backing block/thru-hull bedding material..!
-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.

Reply With Quote Quick reply to this message Share with Facebook

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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

Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Similar Threads
Thread Thread Starter Forum Replies Last Post
worm gear steering flange... Rockter Gear & Maintenance 0 06-16-2008 08:39 PM
CAL39 Hull Flange Issue MarkHorowitz Cal 0 06-27-2007 03:51 PM
MD6A compression test adaptor.. groundhog Gear & Maintenance 2 06-14-2007 02:50 PM
Flange failure foxglove Gear & Maintenance 0 05-11-2004 11:28 AM
USB-serial adaptor NMEA woes magnusmurphy Gear & Maintenance 4 10-26-2003 06:23 AM

All times are GMT -4. The time now is 07:39 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) LLC 2000-2012

The store is owned and operated by a company independent of the forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.