Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-06-2011, 12:51   #1
Registered User
 
theway's Avatar

Join Date: Sep 2010
Location: San Francisco, CA
Boat: 1980 Pearson 323 - 34ft LOA
Posts: 374
Thru Hull / Seacock Service

I have read a lot about boat maintenance, but cant recall anything on how often thru-hull/seacocks should be removed, serviced and "rebeded". Should this be done on a time line, or is it ok to leave them if they are not showing any signs of problems? What can I check for besides visual inspection and opening and closing on a regular basis?

thanks again,
austin
__________________

__________________
theway is offline   Reply With Quote
Old 05-06-2011, 14:13   #2
Registered User

Join Date: Jan 2011
Location: Europe/Caribbean
Boat: Swan 77
Posts: 10
Quote:
Originally Posted by theway
I have read a lot about boat maintenance, but cant recall anything on how often thru-hull/seacocks should be removed, serviced and "rebeded". Should this be done on a time line, or is it ok to leave them if they are not showing any signs of problems? What can I check for besides visual inspection and opening and closing on a regular basis?

thanks again,
austin
Definitely pull them out whenever you're on the hard for antifouling. Check for corrosion and grease them. If properly maintained (and there's no electrolytic corrosion problem) a good seacock will last 40 years or more. Grease as often as possible. There might be a small valve that you can open to grease them regularly while floating.
__________________

__________________
jonmhammond is offline   Reply With Quote
Old 05-06-2011, 14:26   #3
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: Thru hull/seacock service

Assuming they are bronze tapered plug seacocks. #1 make sure they all turn. If you're in the mood for a big job on you stomach and sides etc. Then remove the plugs, clean them up good and regrease them. I use anhydrous lanolin (avail in a pint at your pharmacy..or get them to order a pint) It will resist water flow pretty much forever, and will even stop dripping from a corroded seacock plug. The down side is that the seacocks will be harder to turn...they will take some effort and move slowly. It's great to keep screws etc from corroding into the mast too. Anchor shackles come free no matter how long they have been used etc... I've used it on turnbuckle threads also.. can you tell I love the stuff? :>)
__________________
Cheechako is offline   Reply With Quote
Old 05-06-2011, 14:28   #4
Vendor
 
witzgall's Avatar

Join Date: Oct 2006
Location: Eastern Shore, MD
Boat: Camper Nicholson 44 Ketch
Posts: 1,775
Re: Thru hull/seacock service

The answer depends on the type of seacock or valve you have. It sounds like you are asking about re-bedding thru hull fittings, which is not the same as a seacock.

If it is a cone type or Marelon valve, they need to be serviced every year. A groco stainless ball valve just needs to be inspected and operated on a regular basis.

Thru-hull fittings - that depends on the fitting, and the bedding. They certainly should be inspected for a good seal, and conrrosion/pitting etc.

Chris
__________________
witzgall is offline   Reply With Quote
Old 05-06-2011, 16:04   #5
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: Thru hull/seacock service

oh....and you need to be out of the water!!!!
__________________
Cheechako is offline   Reply With Quote
Old 05-06-2011, 16:42   #6
Sponsoring Vendor
 
HopCar's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 3,162
Re: Thru hull/seacock service

Witzgall has it right. I have seen people put grease fittings in the drain plug hole of cone type seacocks so they can pump grease in. Never do that with a ball valve type seacock as you will blow out the seals.
__________________
Hopkins-Carter Marine Supplies & Fishing Tackle
What You Need, at the Price You Want...with Service!
HopCar is offline   Reply With Quote
Old 08-06-2011, 08:17   #7
Registered User
 
theway's Avatar

Join Date: Sep 2010
Location: San Francisco, CA
Boat: 1980 Pearson 323 - 34ft LOA
Posts: 374
Re: Thru hull/seacock service

Well, thanks again. I am pretty sure all of them are bronze ball type seacocks, and the thru-hull fittings seem to be bedded well (as there are no leaks).

thanks
austin
__________________
theway is offline   Reply With Quote
Old 08-06-2011, 10:08   #8
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: Thru hull/seacock service

It's a tough situation. Your thru hulls are over 30 years old. Bronze is great, but a threaded fitting is perfect for corrosion. Are your seacocks flanged on the bottom making a large flat interface with the hull? or are they screwed on to the top of the threaded thru-hull fitting that extends through and above the hull? It seems "what can go wrong will go wrong" with old boats. Maybe you should remove one and look at the condition for peace of mind?
__________________
Cheechako is offline   Reply With Quote
Old 08-06-2011, 11:09   #9
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Re: Thru hull/seacock service

I'm seriously thinking about replacing my 33 year old ones if I can get to a decent haul out this summer.
Just remebering that thread we had a year or so ago where that gal lost her New to her boat on its maden voyage due to sea cock failure.
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 09-06-2011, 07:37   #10
Registered User
 
Tynesider's Avatar

Join Date: Oct 2010
Location: Northumberland UK
Boat: Colvic Watson
Posts: 94
Images: 12
Re: Thru hull/seacock service

austin[/QUOTE]
Hi Austin

Are they what we call in the UK 'Blakes' valves, If so I agree with others to service them every time you 'lift out', it takes me 2 hrs to do both of my valves in the heads, 1 x 1 1/2" 1 x 3/4".

Remove the top halve of the valve and using 'valve grinding past' and wet/dry paper, grind them out till as below, clean off when finished with thinners and 're grease' with sea cock grease.

Do not overtighten the top bolts on assembly, you should be able to turn the on/off lever with one finger without any leaks.


Before

after

Before

After
__________________
Mike

Archivist for the Colvic Watson Owners Group
Tynesider is offline   Reply With Quote
Old 09-06-2011, 07:56   #11
Registered User
 
theway's Avatar

Join Date: Sep 2010
Location: San Francisco, CA
Boat: 1980 Pearson 323 - 34ft LOA
Posts: 374
Re: Thru hull/seacock service

Thanks for the pictures mike. I think ill take pictures of mine and post them just to get some other eyes on them. Maybe someone with more experience and familiarity will see something that i dont.
__________________
theway is offline   Reply With Quote
Old 09-06-2011, 10:03   #12
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: Thru hull/seacock service

I think what is more prone to failure on a heavy tapered seacock may be the threaded through hull. Maybe just remove one without disturbing the valve in the boat and give it a check.
James: those Bronze tapered valves in your CT are probably really good valves. Maybe ditto my comment above?
__________________
Cheechako is offline   Reply With Quote
Old 09-06-2011, 10:23   #13
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Re: Thru hull/seacock service

I only have two that are below the water line (when at rest) I'm not sure how to be SURE that they haven't lost there "metal" ...don't see any pink.
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 09-06-2011, 10:51   #14
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: Thru hull/seacock service

When you remove the tapered plug you can inspect. If you only have two wow...that's cool. Maybe just leave the inside assembly intact and replace the threaded through hull...? They are cheap and it may not be too hard if you have the tool...
__________________
Cheechako is offline   Reply With Quote
Old 09-06-2011, 11:11   #15
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Re: Thru hull/seacock service

Had more but deleted a bunch during my refit.
Yeah....I think your advice is sound...its the threaded bit that will fail....thanks Cheechako.
__________________

__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Reply

Tags
service, thru hull

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
Corrosion On Seacock Trekka Construction, Maintenance & Refit 15 23-09-2015 16:55
Dysfunctional Seacock theonecalledtom Construction, Maintenance & Refit 5 03-05-2010 17:02
Frozen Seacock DHolt Construction, Maintenance & Refit 10 10-01-2010 19:20
Leaking seacock Trekka Construction, Maintenance & Refit 5 08-09-2008 16:07
seacock/Thru hull problem anglooff Plumbing Systems and Fixtures 12 08-01-2008 13:59



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 10:09.


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.