Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 27-07-2011, 11:05   #1
Registered User

Join Date: Aug 2010
Location: Seattle, WA
Boat: Dix Caribbea 30'
Posts: 59
How to Replace Seacocks

After a lot of electrical and fuel system work, I thought the boat would be good to go for the season. But then I inspected some other items that were in the pre-purchase survey and discovered two inoperable seacocks (always open). They are both the inline valve type, not flanged seacocks. Hoses are single clamped and no room for second clamp.



I would like to replace them with Groco seacocks and add fairing blocks. However, the space around one of the valves is very tight. Also there are several hoses that abut the valve and probably contributed to the obvious corrosion. Those hoses need to be re-routed and somehow there needs to be more space around the valve for a fairing block. I lack the carpentry knowledge to understand how the cabinetry is constructed and generally am at a loss on how to proceed. Suggestions?

I read Maine Sail's guide to fabricating and installing fiberglass fairing blocks. His results look great but are time consuming and require a drill press, which I don't have. Someone else suggested making an epoxy fairing block by pouring epoxy into a cut off yogurt container. Any feedback on this method? This will be my first time doing any epoxy or fiberglass related work.
__________________

__________________
erict is offline   Reply With Quote
Old 27-07-2011, 11:15   #2
Mooderator
 
capngeo's Avatar

Cruisers Forum Supporter

Join Date: Jul 2010
Location: Key West & Sarasota
Boat: Cal 28 "Happy Days"
Posts: 4,211
Images: 12
Send a message via Yahoo to capngeo Send a message via Skype™ to capngeo
Re: How to Replace Seacocks

Fairing blocks can be purchased out of reinforced plastic.... Already drilled, but requiring cutting to the proper angle. That said, there is no real good reason that a through hull (other than a sounder or log) needs to be perpendicular to the waterline.

Assuming you are already on the hard, grind the "mushroom cap" off the TH from the outside to remove the old seacock (again assuming it will not unscrew).
__________________

__________________
Any fool with a big enough checkbook can BUY a boat; it takes a SPECIAL type of fool to build his own! -Capngeo
capngeo is offline   Reply With Quote
Old 27-07-2011, 11:25   #3
Registered User

Join Date: Aug 2010
Location: Seattle, WA
Boat: Dix Caribbea 30'
Posts: 59
Re: How to Replace Seacocks

The thru-hull in the photo is the only one near center. The others are on more angled parts of the hull. Can you use epoxy to fill the irregular space between bottom of a flat fairing block and the curved hull?
__________________
erict is offline   Reply With Quote
Old 27-07-2011, 11:50   #4
Mooderator
 
capngeo's Avatar

Cruisers Forum Supporter

Join Date: Jul 2010
Location: Key West & Sarasota
Boat: Cal 28 "Happy Days"
Posts: 4,211
Images: 12
Send a message via Yahoo to capngeo Send a message via Skype™ to capngeo
Re: How to Replace Seacocks

Again, no reason to have plumbing.... Well... Plumb. It cares not what angle it exits the hull.

Epoxy would be suitable, IF it is reinforced. Resin alone is not very strong in thick applications.
__________________
Any fool with a big enough checkbook can BUY a boat; it takes a SPECIAL type of fool to build his own! -Capngeo
capngeo is offline   Reply With Quote
Old 27-07-2011, 12:08   #5
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,580
Images: 240
Re: How to Replace Seacocks

I suspect he's referring to installing a flat seacock base on to a curved hull surface.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 27-07-2011, 12:36   #6
Registered User

Join Date: Aug 2010
Location: Seattle, WA
Boat: Dix Caribbea 30'
Posts: 59
Re: How to Replace Seacocks

Yes, Gord, sorry if I'm not describing this well. I plan to re-use the existing holes that the mushrooms fit thru. Whatever angle they currently penetrate the hull is the angle I'll stick with.

The thru-hulls are located on curved portions of the hull. Placing a block with a flat bottom over the curved hull would leave large gaps. I assume epoxy resin (perhaps with a thickener) is a good way to: a) fill those gaps b) bond the block to the hull and c) form a strong base for the seacock.

I would prefer not to drill more holes and instead to use the "alternative method" described by Maine Sail. That method seats threaded rod into the fairing block but not through the hull.
__________________
erict is offline   Reply With Quote
Old 27-07-2011, 13:28   #7
Mooderator
 
capngeo's Avatar

Cruisers Forum Supporter

Join Date: Jul 2010
Location: Key West & Sarasota
Boat: Cal 28 "Happy Days"
Posts: 4,211
Images: 12
Send a message via Yahoo to capngeo Send a message via Skype™ to capngeo
Re: How to Replace Seacocks

Unless your curve is extremely tight, or the TH extremely large, I can't see the "gap" being an issue. Use 3M 5200 or the like, and you'll be fine. I have installed TH fittings in a 12" diameter sea chest with just 52-goo!
__________________
Any fool with a big enough checkbook can BUY a boat; it takes a SPECIAL type of fool to build his own! -Capngeo
capngeo is offline   Reply With Quote
Old 27-07-2011, 14:11   #8
Registered User

Join Date: Jan 2009
Boat: Tartan 37 #6
Posts: 326
Re: How to Replace Seacocks

Replacing Thru-Hulls and Seacocks Photo Gallery by Compass Marine at pbase.com
Read this, his articles are always very useful Bruce.
__________________
steamgoat is offline   Reply With Quote
Old 11-08-2011, 05:49   #9
Registered User

Join Date: Apr 2010
Location: Newport News VA
Boat: Egg Harbor sedan cruiser 1970
Posts: 829
Re: How to Replace Seacocks

I would think just replace the valve with another one from HD or Lowes.
How long life do you expect, how old is the current setup?

If boat in the water, unscrew valve have new one ready to screw on and a backup plan in case the valve wont screw back on.
__________________
sdowney717 is offline   Reply With Quote
Old 11-08-2011, 18:38   #10
Registered User

Join Date: May 2010
Location: St Pete FL
Boat: 1972 Contest 33
Posts: 783
Re: How to Replace Seacocks

Quote:
Originally Posted by sdowney717 View Post
I would think just replace the valve with another one from HD or Lowes.
How long life do you expect, how old is the current setup?

If boat in the water, unscrew valve have new one ready to screw on and a backup plan in case the valve wont screw back on.
This is probably why his seacock doesn't work now. Lowes and Home Depot brass just isn't the best way to go. I know i have the same problem times 3.
__________________
Auto pilot is saying get up here and grab the tiller.
w1651 is offline   Reply With Quote
Old 11-08-2011, 18:54   #11
Registered User

Join Date: Apr 2010
Location: Newport News VA
Boat: Egg Harbor sedan cruiser 1970
Posts: 829
Re: How to Replace Seacocks

I used the bronze valves like this
Apollo valves they work and are not too pricey.
Amazon.com: Apollo Valves 7010401 Ball Valve - 3/4": Home Improvement
__________________

__________________
sdowney717 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
Outboard Not Running TOM Engines and Propulsion Systems 19 05-11-2012 14:50



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:55.


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.