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I am trying to unhook a gas stove flex line. The joint B turns fine so I can unthread it. However the joint A seems to be seized and won’t turn. As a result, I cannot remove the hose as the hose cools on itself. What am I doing wrong? Is there a way to loosen this joint so that the connection turns freely at the flex line and doesn’t twist when I turn the nut? Thanks.

EDIT: To aid others who had trouble removing this, added photo to show how this was finally undone, with help of this amazing group. Thanks @AlaskaMan. Basically the connection was between two chrome hex parts and it was just too tight. I was afraid to break it but the answers here gave me confidence to just go with it. Make sure you have a couple of good pipe wrenches.

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  • Joint A isn't a joint. Are you referring to the joints below each of those indicators? One is where the white tape is on the iron, and the other is between the two hex sections.
    – isherwood
    Nov 2, 2020 at 20:05
  • @isherwood yes, sorry, if this was asked confusingly. I meant, shouldn’t the section between A and B be spinning freely to allow flex line stay static? It is not spinning between the two chrome hex sections at all.
    – David
    Nov 2, 2020 at 20:07
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    A is the fitting on the yellow gas line, B is the nipple on the black pipe. The two are made to go together, it is a flared compression fitting and does not flex. a wrench on B holds it from moving will a wrench on A turns A counterclockwise.
    – Alaska Man
    Nov 2, 2020 at 20:08
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    And being a flared connection it does not get pipe dope when you reinstall it. Nov 2, 2020 at 20:11
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    @David since it seems Alaska Man's answer solved your problem, you can also click the checkmark below the voting arrow to mark the answer as accepted. Nov 2, 2020 at 20:32

1 Answer 1

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A is the fitting on the yellow gas line,

B is the nipple on the black pipe.

The two are made to go together, it is a flared compression fitting and does not flex.

Threaded joints explained.

How to wrap PTFE tape.

a wrench on the nipple (B) holds it from moving while a wrench on fitting (A) turns the fitting counterclockwise. Being a flared connection it does not get pipe dope when you reinstall it.

Since you have loosened B you will need to reset it. It does get pipe dope or PTFE tape (Teflon) made for gas. It appears white water Teflon tape was used.

After you get A and B apart, take B off of the black pipe and thoroughly clean off the threads, apply PTFE tape for gas connections OR pipe dope (not both) and reset B onto the black pipe. It will be helpful to have a PIPE wrench on the black pipe while you tighten the B nipple down. How to use a pipe wrench.

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