Seacocks - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 


Like Tree3Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 03-12-2012
Senior Member
 
Join Date: Feb 2008
Posts: 128
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 7
SkywalkerII is on a distinguished road
Seacocks

I've always used bronze thru hulls with bronze seacocks.

Have to replace the starboard cockpit drain seacock.

The Marelon valves seem to be smoother and easier to operate. Even when I greased the bronze ones, they were always stiff.

Is there any reason I should not put Marelon valve on a bronze mushroom thru hull?

Thanks.
Reply With Quote Share with Facebook
  #2  
Old 03-15-2012
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,401
Thanks: 0
Thanked 17 Times in 17 Posts
Rep Power: 9
night0wl is on a distinguished road
Re: Seacocks

strength & durability?
__________________
S/V Jendai
Beneteau 343
Reply With Quote Share with Facebook
  #3  
Old 03-15-2012
SloopJonB's Avatar
Senior Moment Member
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 10,661
Thanks: 56
Thanked 48 Times in 45 Posts
Rep Power: 4
SloopJonB will become famous soon enough
Re: Seacocks

Marelon valves seem to be gaining in the market. They've been around long enough that any generic plastic problems like age hardening should have shown up by now.

The lack of galvanic problems offsets any questions of strength to my mind.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
Reply With Quote Share with Facebook
  #4  
Old 03-15-2012
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,013
Thanks: 51
Thanked 84 Times in 74 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Re: Seacocks

Lately I've been thinking i should have them on the transom for the cockpit drains
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

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

Last edited by deniseO30; 03-15-2012 at 08:22 PM.
Reply With Quote Share with Facebook
  #5  
Old 03-15-2012
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,401
Thanks: 0
Thanked 17 Times in 17 Posts
Rep Power: 9
night0wl is on a distinguished road
Re: Seacocks

Im looking at the advantages in terms of cost and galvanic corrosion avoidance...and I'm thinking that when it comes time to replace my thru-hulls and seacocks, marelon will be high on the list.

I especially am concerned about the A/C input water thru-hull my dealer installed. Its already looking bad after only 3 years in the marine environment.
__________________
S/V Jendai
Beneteau 343
Reply With Quote Share with Facebook
  #6  
Old 03-15-2012
Senior Member
 
Join Date: Feb 2008
Posts: 128
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 7
SkywalkerII is on a distinguished road
Re: Seacocks

Thanks for the thoughts.

I've decided to go with Marelon.
Reply With Quote Share with Facebook
  #7  
Old 03-16-2012
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 8,837
Thanks: 10
Thanked 131 Times in 117 Posts
Rep Power: 6
Minnewaska will become famous soon enough Minnewaska will become famous soon enough
Re: Seacocks

This can almost rise to the level of debating anchors. I'm old school and haven't embrassed GRP seacocks yet, but acknowledge some of the reasons why they are attractive (corrosion).

However, the principal reason for a seacock is to prevent water from entering the boat, when you don't want it to. Otherwise, you wouldn't bother having one at all. If I understand correctly, you must be diligent in greasing these during the season or risk shearing off the handle from the ball. I've read where users thought they were closing valves, until they hauled and found out nothing was happening.

Just food for thought on the maintenance difference in season. I have no first hand experience, other than a week long charter or two, where I didn't give it much mind. I open and close nearly every bronze seacock every week, as I come and go, which seems to be about all the maintenance they require.
__________________

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

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Reply With Quote Share with Facebook
  #8  
Old 03-16-2012
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,293
Thanks: 10
Thanked 117 Times in 85 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: Seacocks

Quote:
Originally Posted by SkywalkerII View Post
I've always used bronze thru hulls with bronze seacocks.

Have to replace the starboard cockpit drain seacock.

The Marelon valves seem to be smoother and easier to operate. Even when I greased the bronze ones, they were always stiff.
They may seem that way now but may not once they have been in the water for a while, they may not. There are many cases where the valves have had the handles break completely off. I think the newer ones are better, specifically the 93/OEM series. Forespar requires annual greasing an lubrication something that many just won't or don't do.

Quote:
Originally Posted by SkywalkerII View Post
Is there any reason I should not put Marelon valve on a bronze mushroom thru hull?
1 - It is a thread mismatch. The thru-hull is NPS (straight thread) and the Marelon valve, if purchased in the US, is NPT or a tapered thread. This goes against ABYC standards though people & builders still do it...

2 - You gain little to no corrosion benefit by threading a Marelon valve onto a bronze thru-hull. If there was a serious DC leak you'd still be in a potential for the bronze to suffer. Personally I find the corrosion issue, IF you use REAL UL Marine bronze parts, is over blown and quite rare. This IS the real benefit to Marelon though!!

I have a box of bronze tapered cone seacocks that came out of a wooden boat built in the 1930's and may have been re-fit in about 1956 but they found no evidence of this. Other than some nasty surface "patina", called Verdegris, which has no effect on the performance of the seacock these valves have ZERO corrosion on them and were in service for at the least 54 years, and if not replaced in the 1950's could be 81 years old.....

3 - In load testing I have conducted the Marelon is considerably less strong than bronze, about half, in a valve on a thru-hull installation...

4 - Valve on thru-hull installations, at least in the smaller sizes like 3/4 & 1", do not meet ABYC strength standards for thru-hulls and seacocks. They should be able to withstand 500 pounds of load at the innermost "hard piping" or the innermost portion of the male adapter/hose barb for 30 seconds. A 3/4" Bronze valve on a thru-hull fails at about 400 pounds, and the same in Marelon fails at under 200 pounds...

5 - If you are buying quality valves such as those by Apollo/Conbraco or Groco the handles may be a little stiffer but they should still open and close for many, many years..



I have no qualms about Marelon IF it is the OEM/93 series, they are excellent seacocks, but the other ones, especially a valve threaded directly on a thru-hull, you'd not personally catch me installing on my own boat...
Sea Diamond likes this.
__________________
______
-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; 03-16-2012 at 07:46 AM.
Reply With Quote Share with Facebook
  #9  
Old 03-16-2012
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,182
Thanks: 2
Thanked 33 Times in 33 Posts
Rep Power: 4
MarkSF is on a distinguished road
Re: Seacocks

Just replaced 3 of the Wilcox-Crittenden bronze tapered valves after 28 years. There was no corrosion, just some wear of the tapered plug and bore preventing a good seal, in turn causing a slow drip from them. They still all turned OK.

There are still 6 of the WC tapered valves working fine. These are the less used ones so have been less subject to wear of the bore.

We'll see how the Groco replacements fare.
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Share with Facebook
  #10  
Old 03-16-2012
tommays's Avatar
Senior Member
 
Join Date: Sep 2008
Posts: 4,234
Thanks: 1
Thanked 24 Times in 24 Posts
Rep Power: 6
tommays will become famous soon enough
Re: Seacocks

IMHP the Groco BV series are great quality ,can be serviced and are as bullet proof as something can be at a pretty fair price





The handle is the best i have seen in a modern unit
olson34 and mitiempo like this.
__________________
1970 Cal 29 Sea Fever

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

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


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
Seacocks SloopJonB Gear & Maintenance 1 01-01-2012 09:16 PM
seacocks again redhead78 Gear & Maintenance 2 01-18-2010 06:59 PM
Seacocks chris_gee Gear & Maintenance 10 01-17-2009 01:57 AM
Seacocks - Again MeCaptainBinky Gear & Maintenance 13 10-19-2008 10:10 PM
Seacocks - Who Needs 'em? SeaStrutter Gear & Maintenance 20 02-20-2007 02:43 PM


All times are GMT -4. The time now is 10:04 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

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