LPG locker filling with seawater - SailNet Community

   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
 Not a Member? 
  #1  
Old 09-11-2011
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,296
Thanks: 2
Thanked 45 Times in 45 Posts
Rep Power: 4
MarkSF is on a distinguished road
LPG locker filling with seawater

On a starboard tack it seems that my LPG bottle locker is filling with seawater. There is a drain/vent hose that connects the bottom of the locker to a hole on the stern, level with the engine exhaust.

The result is that both my bottles are completely rusted out at the base.

Could anyone suggest a fix?
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 09-11-2011
imagine2frolic's Avatar
Senior Member
 
Join Date: Aug 2008
Posts: 1,830
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 7
imagine2frolic is on a distinguished road
Raise the hose higher than the thruhull, and put an anti siphon valve in it.....i2f
__________________
20 MPH ain't fast unless, you do it in a 1000sq 3/2 house on 10foot waves
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


BORROWED, No single one of us is as smart as all of us!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 09-11-2011
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,296
Thanks: 2
Thanked 45 Times in 45 Posts
Rep Power: 4
MarkSF is on a distinguished road
Quote:
Originally Posted by imagine2frolic View Post
Raise the hose higher than the thruhull, and put an anti siphon valve in it.....i2f
Wouldn't that stop any leaking LPG from running down the hose?
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 09-11-2011
djodenda's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Kirkland, Washington
Posts: 1,620
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 10
djodenda will become famous soon enough djodenda will become famous soon enough
When you replace your tanks, go with fiberglass. I really like my fiberglass tanks.

Not trying to be a wise-acre. And I don't have a fix for your problem, although the fiberglass tanks won't mind getting wet.
__________________
David

1987 CS 36 Merlin "Kyrie"

"They drove a dump truck full of money up to my house. I'm not made of stone!" -Krusty the Clown
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 09-11-2011
PorFin's Avatar
Señor Member
 
Join Date: Sep 2007
Posts: 1,340
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 8
PorFin is on a distinguished road
Quote:
Originally Posted by MarkSF View Post
On a starboard tack it seems that my LPG bottle locker is filling with seawater. There is a drain/vent hose that connects the bottom of the locker to a hole on the stern, level with the engine exhaust.

The result is that both my bottles are completely rusted out at the base.

Could anyone suggest a fix?
Rerouting the vent line sounds in order, but may be tricky depending on your hull design. The danger (as you've touched on) is getting propane trapped in the line when the through hull is buried and water effectively blocks the passage.

A no cost option would be to not heel the boat over so far on a starboard tack.

While not addressing the cause, since you've got to replace the tanks anyway replace them with composite tanks (best) or aluminum (better than steel.)

Hope you find a good solution.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 09-11-2011
Classic30's Avatar
Once known as Hartley18
 
Join Date: Aug 2007
Location: Melbourne, Australia
Posts: 4,617
Thanks: 38
Thanked 54 Times in 54 Posts
Rep Power: 9
Classic30 will become famous soon enough Classic30 will become famous soon enough
Gas bottles really should be elevated slightly above the floor of the locker on a low plastic/fibreglass plinth, away from the water getting in (presumably only a small amount). Stainless steel tanks are available in some places but do tend to be a little expensive..

You can probably install a flapper valve (piece of plastic on a hinge over the outside of the vent hole) that will allow stuff out but very little back in. That, plus the low plinth, should be enough to stop your tanks rusting out.
__________________
-
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 09-11-2011
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,296
Thanks: 2
Thanked 45 Times in 45 Posts
Rep Power: 4
MarkSF is on a distinguished road
The bottom of the locker does have some raised ribbing, but I'm wondering if it's high enough. Maybe there's vertical room to raise the bottles an inch or two higher.

The fibreglass bottle sounds like a good solution. As I only do weekend sails, I'm thinking of going with just one bottle and a single regulator and saving some money. I can always add a second one later.
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 09-11-2011
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,280
Thanks: 0
Thanked 79 Times in 70 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
The vent hose has to travel downhill to the through hull. If it is re-routed upwards, whether there is an anti siphon or not, it will not drain.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 09-12-2011
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,296
Thanks: 2
Thanked 45 Times in 45 Posts
Rep Power: 4
MarkSF is on a distinguished road
Quote:
Originally Posted by mitiempo View Post
The vent hose has to travel downhill to the through hull. If it is re-routed upwards, whether there is an anti siphon or not, it will not drain.
Yes, I agree that's not a solution. It's not really a hose either, it's a solid fibreglassed tube! Typical Bristol over-engineering.
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 09-12-2011
Classic30's Avatar
Once known as Hartley18
 
Join Date: Aug 2007
Location: Melbourne, Australia
Posts: 4,617
Thanks: 38
Thanked 54 Times in 54 Posts
Rep Power: 9
Classic30 will become famous soon enough Classic30 will become famous soon enough
Quote:
Originally Posted by MarkSF View Post
The bottom of the locker does have some raised ribbing, but I'm wondering if it's high enough. Maybe there's vertical room to raise the bottles an inch or two higher.
Mark, it doesn't need to be higher than an inch. Just enough to allow whatever water does leak in via the flapper valve (usually less than a half-cupful) to not reach the skin of the tank.

It does sound to me like a flapper valve on the vent is all you really need.
__________________
-
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

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

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Genoa not filling up... SebastienL Seamanship & Navigation 4 10-13-2010 10:15 AM
M25XP seawater pump will not pump anemoneii Diesel 6 04-22-2010 11:47 PM
filling a small gap xort Gear & Maintenance 5 10-07-2008 03:05 PM
Using Seawater to cool Cabin DallasAB Gear & Maintenance 11 06-04-2007 11:55 PM
Freshwater to seawater ratio wanabe Cruising & Liveaboard Forum 30 04-24-2007 10:57 PM


All times are GMT -4. The time now is 06:38 PM.

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.