Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-19-2007, 10:25 AM   #1
4 Rivet Member
 
1975 27' Overlander
High River , Alberta
Join Date: Aug 2006
Posts: 393
new gas line couplings still leak

The short gas line from the rearmost valve to the water heater on my trailer had a leak at the water heater end. I tried tightening it, to no avail - big bubbles. I had a new copper line made up - single flares, with new couplers. However, I still get small leaks, now at each end.

What do I do now? Is the quality of the flaring work a potential issue? The flares look a little rough, can I cleaning them up with some emery cloth? Or do I just need to tighten things even more than I already have?

Help would be appreciated, because I'd like to have hot water again!
__________________

__________________
AlbertF is offline   Reply With Quote
Old 06-19-2007, 11:00 AM   #2
More than one rivet loose
 
thecatsandi's Avatar

 
Currently Looking...
Keymar , Maryland
Join Date: Feb 2006
Posts: 3,754
WHat do the mating surfaces look like? are they clean and free of dirt and defects? if not They need to be. Over tightening will reslt in failure of the the joint.
__________________

__________________
Michelle TAC MT-0
Sarah, Snowball

Looking for a 1962 Flying Cloud

thecatsandi is offline   Reply With Quote
Old 06-19-2007, 11:28 AM   #3
Rivet Master
 
1963 19' Globetrotter
Currently Looking...
Moline , Illinois
Join Date: Aug 2004
Posts: 635
Could be bad flares, some of the cheap Chinese tools make bad flares, I broke down and spent the $50 bucks for a Rigid tool - no problem now. You can also overtighten or not be properly aligned and get a leak.

Find someone with a good tool to remake the line and be careful when you tighten it. You can do it yourself , check with any mechanic you now, they'll have a flaring tool.
__________________
63air is offline   Reply With Quote
Old 06-19-2007, 12:27 PM   #4
Rivet Master
 
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
Join Date: Jul 2005
Posts: 2,941
Actually, the current required standard for gas lines for RV's is to use double flares. Check to see if the fittings in the water heater require you to use single or double flares. Your unit might have single or double fares originally.
__________________
dwightdi is offline   Reply With Quote
Old 06-20-2007, 01:42 PM   #5
Rivet Master
 
Join Date: Dec 2002
Posts: 1,313
Images: 4
Albert, I use a pipe joint compound made for use with LP gas. This is a different compound and color to the usual water pipe compound. It is shown, well down the page, as a yellow compound here:
Thread Sealant Compounds Product Info and Reviews | DoItYourself.com
It works for me.
Nick.
__________________
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."
nickcrowhurst is offline   Reply With Quote
Old 06-20-2007, 06:55 PM   #6
Rivet Master
 
Fyrzowt's Avatar
 
2000 25' Safari
West of Fort Worth , Texas
Join Date: Aug 2006
Posts: 6,697
Images: 8
With a flare fitting, isn't the seal at the face of the flare and not the threads? I don't see the point of sealing the threads.
Dave
__________________
Fyrzowt is offline   Reply With Quote
Old 06-20-2007, 07:42 PM   #7
4 Rivet Member
 
1975 27' Overlander
High River , Alberta
Join Date: Aug 2006
Posts: 393
Quote:
Originally Posted by Fyrzowt
With a flare fitting, isn't the seal at the face of the flare and not the threads? I don't see the point of sealing the threads.
Dave
That's what I thought. It's a compression fitting, and it's now clear to me that a high quality mating surface is essential. The flares don't look that good; the copper seems to be a bit mashed looking. Somebody at a hardware store flared the lines for me with an old tool. Part of the problem, I guess.

I knew that double flaring was required for car brake lines, but didn't expect that with low pressure gas fittings. If single flares don't work, I'll try doubles.

First, I need to find my own flaring tool!

Thanks to all for the help.
__________________
AlbertF is offline   Reply With Quote
Old 06-21-2007, 12:38 AM   #8
Rivet Master
 
Join Date: Dec 2002
Posts: 1,313
Images: 4
Quote:
Originally Posted by Fyrzowt
With a flare fitting, isn't the seal at the face of the flare and not the threads? I don't see the point of sealing the threads.
Dave
That''s why I put it on the flare. As designed, the flare should self-seal, but, if not, a smear of the paste seals it for me , and minimizes the torque required to make the seal. I've used it as a "get me out of trouble" fix, for example on my sailing yacht, a long way from a hardware store.
Nick.
__________________
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."
nickcrowhurst is offline   Reply With Quote
Old 06-21-2007, 10:43 AM   #9
Rivet Master
 
Fyrzowt's Avatar
 
2000 25' Safari
West of Fort Worth , Texas
Join Date: Aug 2006
Posts: 6,697
Images: 8
Thanks Nick,
Sorry, I thought you were referring to sealing the threads.
Dave
__________________
Fyrzowt is offline   Reply With Quote
Old 06-21-2007, 11:28 AM   #10
Rivet Master
 
Join Date: Dec 2002
Posts: 1,313
Images: 4
Quote:
Originally Posted by Fyrzowt
Thanks Nick,
Sorry, I thought you were referring to sealing the threads.
Dave
Dave, I should have been more explicit. Nick.
__________________
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."
nickcrowhurst is offline   Reply With Quote
Old 08-28-2007, 12:56 PM   #11
4 Rivet Member
 
1975 27' Overlander
High River , Alberta
Join Date: Aug 2006
Posts: 393
Quote:
Originally Posted by 63air
Could be bad flares, some of the cheap Chinese tools make bad flares, I broke down and spent the $50 bucks for a Rigid tool - no problem now. You can also overtighten or not be properly aligned and get a leak.

Find someone with a good tool to remake the line and be careful when you tighten it. You can do it yourself , check with any mechanic you now, they'll have a flaring tool.
Good advice!

I bought a cheap Chinese tool, since it was the only thing I could find in a retail store . . . and I still can't solve the leak problem completely. (Been busy with house renovation work, just got back to dealing with this issue.) I am going to need to find a good quality tool, as recommended. However, I'm becoming quite comfortable about messing with gas lines. A spray bottle with a bit of soapy water is very effective at unmasking leaks.
__________________
AlbertF is offline   Reply With Quote
Old 08-28-2007, 01:07 PM   #12
Rivet Master
 
Ganglin's Avatar
 
1971 27' Overlander
Central , Ohio
Join Date: Jun 2006
Posts: 2,365
Images: 13
AlbertF - we just installed a new hot water heater - used a 3/8 flex line from Home Depot they come in 2 foot and 3 foot lengths - no flaring required and easier to install. Make sure the male fitting is clean as mentioned above.
__________________
Ganglin is offline   Reply With Quote
Old 08-28-2007, 01:14 PM   #13
4 Rivet Member
 
jimmickle's Avatar
 
2000 31' Land Yacht
Join Date: Sep 2003
Posts: 497
A good double flaring tool should be available at your local auto parts store. Once you have a double flaring tool, you will never single flare again. If they don't have one, check with one of the tool trucks like Snap On.
__________________

__________________
jimmickle is offline   Reply With Quote
Reply


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

Advanced Search
Display Modes

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
Water leak panoramic windows Andy Fay Windows & Screens 16 01-05-2007 09:33 AM
Water leak James Schmidt 1993 Excella 1000 11 02-02-2004 08:54 AM
'99 25' Safari water leak driving me crazy Raptorrider2001 1999 Safari 4 12-06-2002 07:34 PM
Rainwater leak James Schmidt Leaks - Weatherstrips, Gaskets, Caulks & Sealants 8 09-11-2002 07:28 AM
Propane and Electrical Line Protection Tamara Electrical - Systems, Generators, Batteries & Solar 7 06-27-2002 10:42 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:50 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.