Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 15-12-2013, 08:40   #1
Registered User
 
endoftheroad's Avatar

Join Date: Dec 2008
Location: Key West
Boat: Westsail 32 and Herreshoff 28
Posts: 1,159
Relocating Cockpit Drains to Above the Waterline.

Many boats with below waterline drains do the modification including Westsails.

I have been assuming that I would use Forespar (white plastic) thru-hulls for the above waterline cockpit drains but it just dawned on me how much my boat bucks out here in my exposed anchorage and that the thru-hulls would be constantly dipped or submerged in salt water.
Also bucking a current or high rpm's of the diesel squats the ass end of the boat further exposing the thruhulls and aft ends of the inside of the hoses to salt water.
Probably best to use bronze thru-hulls?

Also, can anyone think of any scenarios where a seacock on the thru-hull would come in handy or even a life saver?

I just bought a Herreshoff 28 about 5 weeks ago, the former retiring English prudent sailor had seacocks installed on above WL thru-hulls. Mind you the boat sits low in the water, in fact I step from my Caribe inflatable onto the Herreshoff opposite of the climb up onto the Westsail. He sailed almost everywhere on the globe with the boat.

So...
Bronze thru-hulls?
And, install seacocks?

Thanks,
Carl
__________________

__________________
endoftheroad is offline   Reply With Quote
Old 15-12-2013, 09:00   #2
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,573
Images: 240
Re: Relocating Cockpit Drains to Above the Waterline.

Install (bronze) seaccocks.
Seacocks should be installed on all hull penetrations, including cockpit drains, below the maximum heeled waterline, except the engine exhaust.
__________________

__________________
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 15-12-2013, 15:54   #3
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,003
Send a message via Yahoo to roverhi
Re: Relocating Cockpit Drains to Above the Waterline.

Any cockpit drain through hull will be underwater on one tack or the other unless the cockpit is not self draining or outrageously high freeboard. Might be a safety feature for a power boat or one that lives at anchor but no great addition for a sailboat. I'd stick with cockpit drains wherever they are now with a bronze through hull, seacock or marine ball valve.
__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Old 15-12-2013, 16:01   #4
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,003
Send a message via Yahoo to roverhi
Re: Relocating Cockpit Drains to Above the Waterline.

GordMay, why do you exempt the engine exhaust from having a seacock?? Most boats have an anti syphon loop that is well above the water line but high following seas could still back flow into the engine. Know The valve would be one thing more to forget to open. Seems like that would be obvious real quick if engine was started with it closed.

Just curious 'cause because current boat has a swing check valve at the above the water through hull just below the transom. Don't really trust check valves and was thinking of putting a ball valve in line instead.
__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Old 15-12-2013, 17:47   #5
CF Adviser
 
Pelagic's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Boat: Van Helleman Schooner 65ft StarGazer
Posts: 6,878
Gord probably has better reasons but I think it is because it is not necessary due to the anti siphon loop and the fact that carbon deposits would sizes up the large valve. If stern exhaust then a check valve or flap is usually enough. Just think of the problems if a valve failed in the closed position
__________________
Pelagic is online now   Reply With Quote
Old 16-12-2013, 01:08   #6
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Relocating Cockpit Drains to Above the Waterline.

Quote:
Originally Posted by roverhi View Post
Any cockpit drain through hull will be underwater on one tack or the other unless the cockpit is not self draining or outrageously high freeboard.
Not mine! Unless I get a huge following sea. And I bought the big SS ones. And I've never had water coming back up thru the deck drain.

.
Attached Thumbnails
Click image for larger version

Name:	UD_duck4.jpg
Views:	126
Size:	431.5 KB
ID:	72220  
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 16-12-2013, 17:14   #7
Registered User
 
endoftheroad's Avatar

Join Date: Dec 2008
Location: Key West
Boat: Westsail 32 and Herreshoff 28
Posts: 1,159
I guess that was a dumb question.
I'll install new bronze seacocks and thruhulls.
__________________
endoftheroad is offline   Reply With Quote
Old 16-12-2013, 18:11   #8
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Relocating Cockpit Drains to Above the Waterline.

Quote:
Originally Posted by endoftheroad View Post
I guess that was a dumb question.
I'll install new bronze seacocks and thruhulls.
You don't need seacocks for deck drains. If they are above the waterline there is no need to shut them off unless the boat is already sinking. Freezing is the biggest problem, the next is letting them get plugged.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 05-01-2014, 00:14   #9
Registered User
 
endoftheroad's Avatar

Join Date: Dec 2008
Location: Key West
Boat: Westsail 32 and Herreshoff 28
Posts: 1,159
Re: Relocating Cockpit Drains to Above the Waterline.

I bought bronze valves and bronze thruhuls because the new location for this modification is only about 6-8 inches above the WL.
__________________

__________________
endoftheroad 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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 19:59.


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.