SailNet Community - Reply to Topic

   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 > Seacocks
 Not a Member? 


Thread: Seacocks Reply to Thread
Title:
  

By choosing to post the reply below you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

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:

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.



Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Topic Review (Newest First)
03-16-2012 05:36 PM
Maine Sail
Re: Seacocks

Quote:
Originally Posted by MarkSF View Post
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.
Mark,

It is very rare that a tapered cone seacock can't be serviced to work as good as new. I think I can only recall one that was ruined and that was because a piece of monel wire fell down the sink drain and the owner closed the seacock on it..

I have lapped some very, very bad wear out and the valves went on for many more years of service...


Servicing Tapered Cone Seacocks (LINK)
03-16-2012 05:33 PM
Sea Diamond
Re: Seacocks

Again we see the huge benefit of regular maintanance, the least of which is winter lubrication of thru hulls, which is sadly lacking in many sailors today.
03-16-2012 05:09 PM
SloopJonB
Re: Seacocks

Quote:
Originally Posted by MarkSF View Post
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.
If a little wear or wasp waisting was all the problem was, you should have been able to merely lap the cones with valve lapping compound to make them as good or better than new.
03-16-2012 01:24 PM
tommays
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
03-16-2012 12:50 PM
MarkSF
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.
03-16-2012 07:40 AM
Maine Sail
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...
03-16-2012 07:07 AM
Minnewaska
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.
03-15-2012 09:03 PM
SkywalkerII
Re: Seacocks

Thanks for the thoughts.

I've decided to go with Marelon.
03-15-2012 08:54 PM
night0wl
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.
03-15-2012 08:17 PM
deniseO30
Re: Seacocks

Lately I've been thinking i should have them on the transom for the cockpit drains
This thread has more than 10 replies. Click here to review the whole thread.

 
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


All times are GMT -4. The time now is 05:57 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.