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Old 02-22-2009, 02:32 PM   #1
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Gas Line into Fireplace


50 yr old home, incoming gas line to fireplace is not round and is stripped. Have approx. 2 to 3 inches remaining vertically thru concrete floor of firebox. In order to reinstall 90 degree elbow, is it best to hire someone to rethread or are there other solutions? Is there enough vertical pipe remaining that it can be cut and rethreaded? Thanks

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Old 02-22-2009, 05:16 PM   #2
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Gas Line into Fireplace


It would be pretty much impossible to re-thread it while still installed in the fireplace, especially with only 3" protruding. What do you mean it is not round? Is it somehow deformed? Provided you can get to it without tearing up the firebox, my recommendation would be to replace the pipes instead of trying to re-use/re-fit them.

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Old 02-23-2009, 12:25 AM   #3
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Gas Line into Fireplace


Thanks for reply. yes, the vertical pipe is also deformed, cannot seal properly with any cap or elbow that would require threaded connection. Is welding by a pro a possibility? The floor of the firebox is brick, the pipe extends thru the motar separation. If I drill thru the motar, around the vertical pipe, do you think there is a possibility I will be able to put a wrench on the pipe and loosen it from the connection below the brick surface of the firebox? Thanks again
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Old 02-23-2009, 06:26 AM   #4
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Gas Line into Fireplace


if you can get the wrench on the last elbow before it goes vertical below the brick.........then a wrench on the piece of riser pipe right at the threads and that last elbow(below the brick).remove it go to HD,and get another piece cut and threaded .add a couple of inches going into the fireplace if you need it.
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Old 02-23-2009, 07:58 AM   #5
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Gas Line into Fireplace


How do you check for leaks in this situation?
Edit, nevermind... Answer: Pressure test with air.
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Old 02-23-2009, 08:30 AM   #6
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Gas Line into Fireplace


If threading the pipe becomes problematic, then it might be possible for the pipe to be welded. It depends on the condition of the pipe. Welded joints are commonplace in commercial construction but are never seen in residential (read: get ready to pay through the nose). The problem with that is that you'll need a 60psi airtest on a weld, which could force a leak on a threaded connection elsewhere in the system.

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