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Old 01-20-2006, 02:45 PM   #1
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1989 29' Excella
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Copper compression fittings vs. flare fittings

I am in the process of adding a quick coupling to the main gas line by the "A" frame on my 89 Excella for which to hook up a camp stove.

Right now the fittings are all flare type fittings. I need to cut the main line back some in order to accomodate the quick coupling device and wonder if using compression fittings are acceptable in this application. The problem is I don't have a flaring tool to remake the flares as needed.

I will be putting in some new soft copper in order to get back to the gas hose coming out of the regulator.

I guess my concern is how the compression fittings will hold up with the vibration and stresses on the line, which are probably minimal.

Any information greatly appreciated.

Thanks,
phippsto
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Old 01-20-2006, 02:54 PM   #2
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My understanding is you want to use flair - also make sure you use sch k copper for gas - not the standard hardware store stuff.....

Ken J.
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Old 01-20-2006, 04:04 PM   #3
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To conform with the LP gas code you need to use a flair type fitting. Flair tools are pretty cheap if you buy the ones from China. Easy to work and vibration and temperature change proof.
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Old 01-20-2006, 04:30 PM   #4
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I "third" what Ken & dwightdi say about flared fittings. Compression fittings are not code for gas. Also, I agree with that the China-made tools are more than adequate for the small number of flares you need to make.

And, to agree with 87MH before he may or may not post, "...Do it right the first time"

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Old 01-20-2006, 06:19 PM   #5
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Phippsto,

Ditto on the advice above. Flairs are the only way to go. When you do get a flair tool, be sure to check the alignment of the openings when you clamp it together and be sure that the tool will make double flairs. They should form a perfect circle. If not, look at another one. Harbor Frieght actually sells one of the best out there....short of the $300 pro models that plumbers (and RV techs ) use!
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Old 01-20-2006, 06:36 PM   #6
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Quote:
Originally Posted by lewster
... be sure that the tool will make double flairs...
My Airstream had no double flares in any of it's gas line joints nor did I make any for the limited amount of gas line work I did.

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Old 01-20-2006, 06:37 PM   #7
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Quote:
Originally Posted by lewster
Phippsto,

Ditto on the advice above. Flairs are the only way to go. When you do get a flair tool, be sure to check the alignment of the openings when you clamp it together and be sure that the tool will make double flairs. They should form a perfect circle. If not, look at another one. Harbor Frieght actually sells one of the best out there....short of the $300 pro models that plumbers (and RV techs ) use!
Lew, have you been peeking in my toolbox?
Phippsto, make sure you get the kit that makes double flares, not just single flares. It is a two-part process, the instructions should be on the package or in it. Make sure the kit has the proper size pieces you will need.
Also, a fourth (or fifth) to the advice about the fittings, compression fittings are prone to leak, especially with vibration, so flare fittings are the way to go.
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Old 01-20-2006, 08:56 PM   #8
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Check this Puppy out!

I'm reading this thread and WHOA the truth is revealed. Below are shots of my factory installed (1964) LPG lines running to the stove manifold with a splice off to the LPG lantern! You'll note the cut and taped line on the right. I just cut the line apart thinking that I'd put it back together with another compression fitting!
Thanks for the "heads-up" and I gotta say, I've found some other stuff that the factory did that makes a rational mind wonder as well.
Ed
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Old 01-20-2006, 09:09 PM   #9
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Quote:
Originally Posted by Wardinbb
I'm reading this thread and WHOA the truth is revealed. Below are shots of my factory installed (1964) LPG lines running to the stove manifold with a splice off to the LPG lantern! You'll note the cut and taped line on the right. I just cut the line apart thinking that I'd put it back together with another compression fitting!
Thanks for the "heads-up" and I gotta say, I've found some other stuff that the factory did that makes a rational mind wonder as well.
Ed
Ed, you MIGHT find that those fittings are flare fittings. I had some in our '63 I thought were compression fittings. When I took them apart, they were flared, with that weird looking end that you have. Of course, yours may well be compression fittings, only taking one apart will tell for sure.
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Old 01-20-2006, 09:23 PM   #10
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Yes Terry, I disassembled and confirmed before I posted cause I couldn't believe what I was reading. The only flare on that whole set-up is the end connection to the stove manifold. And it was worth hitting the 22 degrees outside and snapping a couple of shots to expose this sort of thing. I sure hope a 3/8 reduction flare T to 1/4 exists!
Ed
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Old 01-20-2006, 09:42 PM   #11
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Wow. If they got caught doing that today, they would most likely be strung up by their nether regions!
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Old 01-20-2006, 10:09 PM   #12
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Ya Just Never Know what DANGER lurks within...

That set-up is scary! Can you imagine that connection leaking and then turning on the stove!? I think its a serious heads-up that us folks with vintage units confirm their connections that run to that lantern. Why they chose to splice off an interior line as opposed to creating a dedicated line from underneath the trailer like all the rest of the LPG lines and why they chose to use compression fittings is again, beyond wonder. And thanks to the Forum, the life that was saved is mine! I really would have just copied what was there on the re-install. The seriousness of that original installation cannot be understated.
Ed
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Old 01-20-2006, 10:09 PM   #13
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I doubt those are original - all the fittings I've seen going back to my 58 are flair.....

Ken J.
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Old 01-20-2006, 10:22 PM   #14
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I'll disagree with your observation Ken. I took that galley apart very carefully and saw no signs of evidence that any one else had been there. You're right, the fittings are suppossed to be flared and yours are. But I find that the reality is that mine were not, for some reason. The lantern was installed at time of couch assembly, there's no way that the way it's in place for it to be installed in an after market sense. But hey, one can't ever know sometimes, but what I think is important is that an anomaly has shown up and we are all better off knowing about it however it got there.
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