Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 11-12-2008, 21:36   #1
Registered User

Join Date: Aug 2007
Location: Southbound
Boat: Pearson 31-2
Posts: 303
Thru-hull ball valve stuck. will it break?

I've been crawling around in my new boat and found 2 valves on thru hulls that won't close. 1 of them moves a little and the other is frozen when applying reasonable pressure. So, how much torque can I put on the valve without very bad things happening? The boat is in the water. I'm sure the best thing would be to haul out and replace them, but it's not possible right now. I'll be motoring down the ICW in a couple of weeks so would it be better to not mess with them until I'm able to haul? The valves look bronze and have a yellow handle that says Apollo.

Thanks for your help.
__________________

__________________
Aquah0lic is offline   Reply With Quote
Old 11-12-2008, 21:45   #2
Marine Service Provider
 
AnchorageGuy's Avatar

Join Date: Mar 2003
Location: Wherever the boat is!
Boat: Marine Trader 34DC
Posts: 4,618
I think I would spray them down with PB Blaster then something like Corrosion Block. But if they are fouled on the inside nothing is going to work short of a haul out. So if they are open get a couple of tapered wood plugs and tie them to the valves with light sewing string and keep a hammer handy. Next time you are in warm weather, go over the side and see if you can clean them up on the inside.
__________________

__________________
Chesapeake Bay, ICW Hampton Roads To Key West, The Gulf Coast, The Bahamas

The Trawler Beach House
Voyages Of Sea Trek
AnchorageGuy is offline   Reply With Quote
Old 11-12-2008, 21:53   #3
Moderator Emeritus
 
Ex-Calif's Avatar

Cruisers Forum Supporter

Join Date: May 2007
Location: Singapore
Boat: Maxi 77 - Relax Lah!
Posts: 11,514
Images: 4
Are the valves separate from the though hull fittings or integrated?

Hard to say what to do at this point except don't force them because you definitely can break something.

Do you know when or if they were last replaced?

I didn't on my boat and one was frozen. I replaced them all along with the through hulls when we changed the toilet and did the first bottom paint.

Cheap insurance in my book and now I know how old they are.

If it were me I would keep some bungs handy, head home and change them all at haul out.
__________________
Relax Lah! is For Sale <--- Click
Click--> Custom CF Google Search or CF Rules
You're gonna need a bigger boat... - Martin Brody
Ex-Calif is offline   Reply With Quote
Old 11-12-2008, 22:05   #4
GreatKetch
Guest

Posts: n/a
If these are really metal ball valves with metal handles, attached to metal thru-hulls, I am going to politely disagree with Ex-Calif, and tell you that you really can't break them by appling torque with just hand pressure. Push on them as hard as you want--BY HAND. If you put a wrench on them, then all bets are off.

Did you have your boat surveyed before you bought it? Did the surveyor have a comment about the through hulls? This should have been SOP for a survey to actuate all seacocks to make sure they worked. If you had no survey, shame on you! If the surveyor skippped this most basic of steps, shame on him--and ask for your money back! If his survey said the seacocks all worked ok, then you might want to call and confirm that he actually actuated them. It he confirms, it will give you a warm and fuzzy feeling about pushing harder.

BUT--keep those bungs handy!
__________________
  Reply With Quote
Old 11-12-2008, 22:23   #5
Moderator Emeritus
 
Ex-Calif's Avatar

Cruisers Forum Supporter

Join Date: May 2007
Location: Singapore
Boat: Maxi 77 - Relax Lah!
Posts: 11,514
Images: 4
I am not worried about breaking the ball valve. I am worried about cracking the hull. I lubed, poked and spit on our valves and pushed hard enough to flex the hull surrounding the valve.
__________________
Relax Lah! is For Sale <--- Click
Click--> Custom CF Google Search or CF Rules
You're gonna need a bigger boat... - Martin Brody
Ex-Calif is offline   Reply With Quote
Old 11-12-2008, 22:26   #6
GreatKetch
Guest

Posts: n/a
Quote:
Originally Posted by Ex-Calif View Post
I am not worried about breaking the ball valve. I am worried about cracking the hull. I lubed, poked and spit on our valves and pushed hard enough to flex the hull surrounding the valve.
I guess I have the advantage of working on old hulls that are way thicker than they "needed" to be.

If your hull is flexing by hand pressure on a thru-hull, STOP! Forget about changing the thru-hull, and change boats!
__________________
  Reply With Quote
Old 11-12-2008, 22:38   #7
Registered User
 
Amgine's Avatar

Join Date: Dec 2004
Location: Vancouver BC
Posts: 1,384
Images: 1
This thread got me looking... and I found an interesting site: Seacock and thru-hull primer.

I still don't know what your Apollo looks like. But hopefully you can get some ideas from that site. My seacocks can be completely taken apart, but this isn't true of all ball designs.
__________________
Amgine
Blog

On the internet, nobody knows you're a dog anchored in a coral atoll.
Amgine is offline   Reply With Quote
Old 11-12-2008, 22:38   #8
Registered User

Join Date: Aug 2008
Location: San Diego, CA
Boat: Jeanneau Sunkiss 47
Posts: 39
You don't need to haul a boat to change a thru hull valve. We change them all the time for customers in the water. Have your new one ready to go, liquid teflon in the threads. (can't use tape because its the female thread). Unscrew the old one and put your hand over the hole. slid your hand out and screw the new one in. It works best if you have the new valve in the closed position. Sometimes the handle is in the way and you can remove it or leave it open and put a plug in it.

Of course if there are any problems you can easily stick a wood plug in the old hole and regroup.

FYI, You can even add a thru hull withouy hauling, including drilling etc, but it requires a divers help for 1/ hour.
__________________
HorizonMarine is offline   Reply With Quote
Old 11-12-2008, 22:56   #9
Registered User
 
Stillraining's Avatar

Join Date: Oct 2008
Location: Puget Sound
Boat: Irwin 41 CC Ketch
Posts: 2,876
Quote:
Originally Posted by HorizonMarine View Post
You don't need to haul a boat to change a thru hull valve. We change them all the time for customers in the water. Have your new one ready to go, liquid teflon in the threads. (can't use tape because its the female thread). Unscrew the old one and put your hand over the hole. slid your hand out and screw the new one in. It works best if you have the new valve in the closed position. Sometimes the handle is in the way and you can remove it or leave it open and put a plug in it.

Of course if there are any problems you can easily stick a wood plug in the old hole and regroup.

FYI, You can even add a thru hull withouy hauling, including drilling etc, but it requires a divers help for 1/ hour.

Cool!!!
__________________
"Go simple, go large!".

Relationships are everything to me...everything else in life is just a tool to enhance them.
Stillraining is offline   Reply With Quote
Old 11-12-2008, 23:00   #10
Moderator Emeritus
 
Ex-Calif's Avatar

Cruisers Forum Supporter

Join Date: May 2007
Location: Singapore
Boat: Maxi 77 - Relax Lah!
Posts: 11,514
Images: 4
Quote:
Originally Posted by HorizonMarine View Post
You don't need to haul a boat to change a thru hull valve. We change them all the time for customers in the water.

That's why I asked if the ball was integrated with the thru hull.
__________________
Relax Lah! is For Sale <--- Click
Click--> Custom CF Google Search or CF Rules
You're gonna need a bigger boat... - Martin Brody
Ex-Calif is offline   Reply With Quote
Old 11-12-2008, 23:07   #11
GreatKetch
Guest

Posts: n/a
The change-out in the water is a lot less tramatic if you stick a wooden plug in from the outside to keep the fountain of water at bay. I always find it hard to think clearly and work efficiently while there is a OCEAN of water coming into my boat! It is truely surprising how much/how fast water comes in through such a small hole!

horizionmarine is exactly right it can be done. And I'd be 100% comfortable doing it on somebody else's boat! I'd still DO it on my boat, but comfortable? Not likely! :P
__________________
  Reply With Quote
Old 11-12-2008, 23:16   #12
Registered User
 
Stillraining's Avatar

Join Date: Oct 2008
Location: Puget Sound
Boat: Irwin 41 CC Ketch
Posts: 2,876
Some one on another forum posted the volume that a 1 1/2 hole will let in with 3' of head ..I spent 2 hours searching math formulas and pipe tables and could not calculate it...does someone know where to find this ?

It would be nice to have a chart of vearing holes sizes at vearing depths of head translated to inflowes..

I'm sure we have a few engineers here capibal of calculating this.
__________________
"Go simple, go large!".

Relationships are everything to me...everything else in life is just a tool to enhance them.
Stillraining is offline   Reply With Quote
Old 11-12-2008, 23:59   #13
Moderator Emeritus
 
Ex-Calif's Avatar

Cruisers Forum Supporter

Join Date: May 2007
Location: Singapore
Boat: Maxi 77 - Relax Lah!
Posts: 11,514
Images: 4
Quote:
Originally Posted by Stillraining View Post
It would be nice to have a chart of vearing holes sizes at vearing depths of head translated to inflowes..

Better yet - seal the cabin, pressurize to about 14.7 PSI and do all the hull maintenance you want -
__________________
Relax Lah! is For Sale <--- Click
Click--> Custom CF Google Search or CF Rules
You're gonna need a bigger boat... - Martin Brody
Ex-Calif is offline   Reply With Quote
Old 12-12-2008, 01:51   #14
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
I replaced one while in the water...it was about 6" below the waterline...I used the boom and a line to the dock to pull the boat over (heel)...It was amazing how little it took to get the thru-hull well out of the water.
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 12-12-2008, 02:28   #15
Registered User
 
Stillraining's Avatar

Join Date: Oct 2008
Location: Puget Sound
Boat: Irwin 41 CC Ketch
Posts: 2,876
Quote:
Originally Posted by Ex-Calif View Post
Better yet - seal the cabin, pressurize to about 14.7 PSI and do all the hull maintenance you want -

That would be a nasty explosion and blow your mind what kind of destruction that would do...

One thing I did learn during my search is that 3' of water column head is only 1 1/2 psi or .5 psi per ft...

When we test sewer lines we use air and are only required to presurize to 4.5 psi...which translates to around 127 lbs of force on a 6" cap IIRC.. It will blow a 6" gasketed sewer cap 20' in the air if you forget to duct tape one...
__________________

__________________
"Go simple, go large!".

Relationships are everything to me...everything else in life is just a tool to enhance them.
Stillraining is offline   Reply With Quote
Reply

Tags
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
Ball Valve Identity svcattales Construction, Maintenance & Refit 5 10-07-2012 05:50
Thru Hull Valve Rating Question Pete the Cat Plumbing Systems and Fixtures 5 03-11-2008 12:24
thru hull valve replacement Jack Long Plumbing Systems and Fixtures 4 15-09-2008 17:19
Ball Valve Gone Bad - Why? Dreaming Yachtsman Plumbing Systems and Fixtures 12 25-09-2007 06:22
stuck Y valve fla.sailor Plumbing Systems and Fixtures 7 07-07-2007 02:10



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 04:22.


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.