Seeking Advise On Small Propane Leak . . .
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Thread: Seeking Advise On Small Propane Leak . . .

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    Marlin's Avatar
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    Seeking Advise On Small Propane Leak . . .

    I decided to check the propane line I installed a few years back for leaks since I smelled just a bit while up on a ladder.

    I managed to fix this one in the area where I smelled propane . . .

    Click image for larger version. 

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    Then I went to the next connection down-stream and sure enough, there's a leak. (I suspect I created it by fixing the leak in the above picture which is upstream.)

    Click image for larger version. 

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    These two shots show what I'd have to dis-assemble, tape again, then reassemble if that's what I decided to do.

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    So I'm looking for suggestions on fixing this leak, the pipe going into the elbow. Or is it more trouble than it's worth?

    What would be acceptable?

    Would heating the connection with a heat gun possibly help?

    Are there other options?

    Looking for suggestions . . .
    Marlin

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    Quote Originally Posted by Marlin View Post
    I decided to check the propane line I installed a few years back for leaks since I smelled just a bit while up on a ladder.

    So I'm looking for suggestions on fixing this leak, the pipe going into the elbow. Or is it more trouble than it's worth?

    What would be acceptable?

    Would heating the connection with a heat gun possibly help?

    Are there other options?

    Looking for suggestions . . .
    No propane leak is really acceptable. Honestly Marlin, if it were me, I'd pull it apart and redope the fittings.
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    I have very limited experience with gas lines but the coupe of times I've watched guys install them, they start at one end (usually at the appliance) and work their way piece-by-piece and fitting-by-fitting to the supply. To do any work on the lines you essentially have disconnect the line at the supply point and slowly disassemble the whole thing back to the problem point, fix the problem and then reassemble everything again. It's black steel pipe so grab a couple of good sized pipe wrenches. The threads will break free.
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    I’d stay away from tape. Use a good pipe dope rated for gas. It’s a tad messier but the end product is much less likely to leak.
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    Pipe dope
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    If you could lower that section, you might be able to get a full turn on that ell, then lift it back up and put it in place, but as stated I would shutdown the electrical and the fuel and disassemble it, clean the fittings with a wire brush, then use rectorseal rated for it. Make sure the fittings are tight, obviously. It's a tapered thread and looking at some of those joints you can see they weren't tightened enough. Probably the pipe was cut a little short, so it was left loose. If you don't disassemble and start over, you'll just be chasing it from one joint to another.

    They do make a coiled pvc coated line they use on the high pressure side of the regulators, but it looks like there's a shut off downstream from that ell plus the flex to the unit.
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    You turned the pipe to the left of the frame and the fitting in your first picture and that caused the leak in the second your surmise?

    Aren’t there gas pipe fittings made the tighten both ways and join supply and appliance side lines in the middle? I would have thought that the fitting in the middle of your first pic was just such a fitting and tried to tighten it thereby sealing your leak and not loosening the whole mess...
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    I would check all the other connections for leaks as well. You may have used a pipe dope the was acceptable for water but not propane. If that's the only leak you could cut the line (after opening the end to let the gas escape) and get the ends threaded and put in a union. That would keep you from having to take the line apart piece by piece.
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    I would get rid of the black pipe and use coiled copper with flares or CSST (corrugated stainless steel tubing) to hook it up. That way you only have two places for a leak, and both are less likely than all those threaded connections. I hate black pipe for gas and air lines.

    https://www.lowes.com/pl/CSST-pipe-f...ing/4294566046
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    Quote Originally Posted by Kennyd View Post
    I would get rid of the black pipe and use coiled copper with flares or CSST (corrugated stainless steel tubing) to hook it up. That way you only have two places for a leak, and both are less likely than all those threaded connections. I hate black pipe for gas and air lines.

    https://www.lowes.com/pl/CSST-pipe-f...ing/4294566046
    Thinking the same thing, less chance for a leak. If you leave the black pipe, or cooper and flair fittings, use pipe dope.
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