Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 16-06-2014, 18:09   #1
Registered User

Join Date: Jan 2010
Location: San Francisco
Posts: 49
Hose Diameter Dilemma, Advice Needed

I'm replacing two cockpit drain seacocks with new bronze Groco seacocks. The hose barb adapter for the Groco seacock takes 2 1/4" ID hose. The cockpit drain tube on the other end takes 2 3/8" hose.

So the question is how to go from 2 1/4" on one end to 2 3/8" on the other end.

Would it be possible with a heat gun and some lubricant to get a 2 1/4" ID hose onto a 2 3/8" OD tube (a difference in diameter of 1/8"). I've never tried it and don't have any 2 1/4" hose on hand to test with so I thought I'd turn the collective wisdom of cruisers forum!

Unfortunately I can't find any adapters for the seacock to make it take 2 3/8" hose (which would be the ideal solution).

Thanks,
Todd
__________________

__________________
thuss is offline   Reply With Quote
Old 16-06-2014, 18:21   #2
Guy
Registered User

Join Date: Feb 2013
Location: So. Oregon, USA
Boat: Seafarer36c
Posts: 4,308
Re: Hose diameter dilemma, advice needed

Heat and lube should do an 1/8" no prob. Especially if you chamfer the edge of the hose with your sharp little pocket knife.
__________________

__________________
Guy is offline   Reply With Quote
Old 16-06-2014, 18:40   #3
Moderator
 
JPA Cate's Avatar

Join Date: Nov 2011
Location: aboard, cruising in Australia
Boat: Sayer 46' Solent rig sloop
Posts: 10,681
Re: Hose diameter dilemma, advice needed

Another way I've seen it done is with 5200. Use the right size on the small fitting, then fit over it the larger hose, glue and clamp. Then put the larger hose on it's appropriate fitting.

Ann
__________________
Ann, with Jim, aboard US s/v Insatiable II, in Oz, very long term cruisers
JPA Cate is online now   Reply With Quote
Old 16-06-2014, 22:03   #4
Sponsoring Vendor
 
HopCar's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 3,160
Re: Hose diameter dilemma, advice needed

Are these 2" seacocks? If so replace the hose barb with a 2" bronze pipe nipple. Two inch pipe has an OD of 2-3/8". The 2-3/8" hose will be a perfect fit.

I cut the threads off the exposed end of the nipple so that they don't cut into the inside of the hose. Use a long enough nipple that you can get two clamps on and the hose will not come off the smooth side of the nipple. If clamping onto the smooth nipple bothers you, file some grooves into it.
__________________
Hopkins-Carter Marine Supplies & Fishing Tackle
What You Need, at the Price You Want...with Service!
HopCar is offline   Reply With Quote
Old 16-06-2014, 22:43   #5
Registered User

Join Date: Jan 2010
Location: San Francisco
Posts: 49
Re: Hose diameter dilemma, advice needed

Thanks for the suggestion!

Groco makes the only bronze pipe nipple I can find but it's fully threaded. All other pipe nipples I could find are red brass.

I suppose I could use epoxy on the hose side of the groco pipe nipple to smooth out the threads?
__________________
thuss is offline   Reply With Quote
Old 17-06-2014, 09:18   #6
Sponsoring Vendor
 
HopCar's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 3,160
Re: Hose Diameter Dilemma, Advice Needed

THUSS, The red brass nipples sold in most marine stores, mine included, are 85-5-5-5. I think that's the same alloy that your Groco seacock is made of. At any rate, I've used them in salt water all my boating life and never had a problem with dezincification.
__________________
Hopkins-Carter Marine Supplies & Fishing Tackle
What You Need, at the Price You Want...with Service!
HopCar is offline   Reply With Quote
Old 17-06-2014, 09:44   #7
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,363
Re: Hose Diameter Dilemma, Advice Needed

If you use non wire wound hose you ought to be able to get it onto 2 3/8 I would think.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 17-06-2014, 10:02   #8
Registered User
 
Terra Nova's Avatar

Join Date: Apr 2007
Location: Marina del Rey, California
Boat: Freya 39 cutter- Terra Nova
Posts: 3,649
Re: Hose diameter dilemma, advice needed

Quote:
Originally Posted by HopCar View Post
Are these 2" seacocks? If so replace the hose barb with a 2" bronze pipe nipple. Two inch pipe has an OD of 2-3/8". The 2-3/8" hose will be a perfect fit.

I cut the threads off the exposed end of the nipple...
This is your solution.

The reason to clamp the hose onto the non-threaded portion of the nipple (not a close nipple) is to be sure of creating a seal.
__________________

__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
Terra Nova is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Advice Needed On Pushing Stuffing Box Hose Onto Shaft macbeth Plumbing Systems and Fixtures 6 24-04-2013 22:10
How much weight needed to sink an 18" diameter mooring ball ? macbeth Anchoring & Mooring 2 13-05-2012 15:40
For Sale: 1-1/8" Diameter Bilge Pump / Livewell Hose zeilschip12 Classifieds Archive 0 17-03-2011 10:10
Smaller Pumpout Hose Diameter ? akio.kanemoto Plumbing Systems and Fixtures 3 10-11-2010 19:10
US hose on metric hose barb coot Construction, Maintenance & Refit 5 04-03-2006 20:22



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 16:22.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.