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Old 09-16-2011, 09:35 AM   #15
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Yes, and he showed a threaded joint in his photo. You are right about the flared fittings; no tape.
Aage Really? Look closer! That IS a flare fitting. It is a male flare elbow.
Please be careful commenting about issues regarding gas or electrical. You may end up facing a lawsuit.
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Old 09-16-2011, 11:12 AM   #16
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Aage Really? Look closer! That IS a flare fitting. It is a male flare elbow.
Please be careful commenting about issues regarding gas or electrical. You may end up facing a lawsuit.
I'd love to see the look on a judges face when you tell him you are suing flanders over incorrect advice on an internet forum.
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Old 09-16-2011, 11:43 AM   #17
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The "smell" is Mercaptan. Didn't look it up. Just one of the random bits of useless knowledge cluttering my brain. Maybe now that I let it out I'll remember where I put my keys......

Sue
I'm not sure if the industry standard is vague enough to allow different odorants to be used, but I know for a fact we use ethyl mercaptan to odorize propane (supply equivalent to about half of Los Angeles market). Ethyl mercaptan is a colorless chemical with highly perceptible odor. I guarantee if it was condensing out of vapor phase that you wouldn't even be able to stand near that pool of liquid without gagging or running away. People who get it on their clothing here change and throw it away because it never comes out. Also, based on the ppm level that is injected, that would mean that a HUGE portion of the chemical condensed out.

My suspicion? One of the propane suppliers that was used at some point with those tanks had a lower grade material than standard, and some heavier butane components got in there. Those could have condensed out easily, especially given some temperature swings and time not being used. That could have allowed vaporized ethyl mercaptan to condense out into the butane phase in small quantities.

I know this really doesn't change anything, but it's fun to apply my little job knowledge to real-life problems.
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Old 09-16-2011, 12:47 PM   #18
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Please be careful commenting about issues regarding gas or electrical. You may end up facing a lawsuit.
Chris,

Please don't sue me. If this is a flared fitting (and I bow to your expertise and eyesight), then I am badly in need of better glasses.
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Old 09-16-2011, 12:57 PM   #19
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Not trying to stir up a mess, just thought I'd give you guys a better view of the fitting.

Just left the hardware Store with new copper line and fittings
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Old 09-16-2011, 01:08 PM   #20
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Mr & Mrs S,

Thanks for posting a clearer shot of that fitting. I think that Chris is definitely right in that it is a flared fitting. It is my understanding that this type of fitting makes the seal in the flare part and not in the threaded part.

However, if some dumb amateur (somebody like me) used the yellow tape on the threaded part of the fitting, is there any risk that it would interfere with the seal?

Just curious. I recently replaced my regulator, and the fittings I used the yellow tape on were threaded. I replaced the WHITE tape that was erroneously used there with the proper yellow tape.

But what I'm wondering is, if I was doing the job that the Smiths are, and applied some yellow tape to the threaded part of the flared fitting, could there be a problem?
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Old 09-16-2011, 01:15 PM   #21
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The risks? Over-tightening and splitting the nut or shearing the threads off so they give way gradually over time... Or, the nut backing off overtime, constantly, every time the temperature changes or it experiences vibration. It's designed around friction, friction is your friend on a flared fitting - and teflon is the second slipperiest substance known to man save ice with a film of water on it. (like going outdoors with the soles of shoes warm and stepping on glaze ice at the top of the stairs, frictionless!)
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Old 09-16-2011, 01:35 PM   #22
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Chris,

Please don't sue me. If this is a flared fitting (and I bow to your expertise and eyesight), then I am badly in need of better glasses.
Aage I certainly won't be suing you, but you can guarantee that some lawyer will be looking for someone to blame and collect a big fat fee for getting cash for somebody.
If you have noticed I don't post much advice regarding these type of issues unless I feel the person in really capable and even then I really limit my advice and suggest they let a professional do it for them.
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Old 09-16-2011, 02:07 PM   #23
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Well I would never try and sue someone over advise from a forum. There has to be a line for common sense and capable boundaries at some point. Not tryin to say y'all were talking about me in general.
I just like to get different views the come up with my own solution. So technically I'm at fault in the end if something goes wrong.
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Old 09-16-2011, 04:52 PM   #24
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Using teflon tape on a flare fitting won't do any good and might do harm. Any time you use it be careful it does not get into the line, a little piece can foul any valve it gets into. Could cause a slow leak of gas in the trailer.
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Old 09-16-2011, 05:15 PM   #25
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I just removed the old line and 4 fittings, none of them had any sort of teflon on them. I'm pretty sure this is factory piping.
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Old 09-19-2011, 08:35 AM   #26
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We just got back from a trip. 5 hours of road time and not all of it great roads. When we pulled in I could smell the gas. Quick crawl underneath with my handy "dollar store Bubble solution" (normally used by kids to make big bubbles) and found the leak. It was coming from a flared fitting I had done about 6 months back. No one to blame but myself. Quick tweak with the wrench an all was well.

So...even when you are done, if you are handy/unhandy like me , you may want to check it on occasion just to be sure all is still well.

Have fun!
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Old 10-04-2011, 06:46 AM   #27
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Propane pipe?

Speaking of replacing some propane line: The copper lines on my '69 AS are much thicker than the copper tubing available at the hardware store, and hence much more resistant to undercarraige damage, I think.
Is there a special pipe for propane, or will regular copper tubing in the plumbing department work? I asked one of the "helpful" orange vests at the hardware store and got a generic answer (deer-in-the-headlight stare, of course ).
I'm starting to think the only qualification to work in a hardware store is knowing North and South (Comin' to work, and a-goin' home. ).

So will regular copper tubing work? I already have a flaring tool.
Thanks!
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Old 10-04-2011, 09:02 AM   #28
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Copper tubing is designed for specific uses. Go to one of the big box stores. They should have it in boxes of 25' and the box will give info on what the tubing is designed for; ie refrigeration etc.
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