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Disconnected double wall gas exhaust pipe

Selina
Selina Member Posts: 1
in Pipe Deterioration

Someone working on my house pulled my double wall pipe apart that was used for the gas exhaust for my furnace. I am trying to get the bottom section back into the top but for some reason I can't get it high enough. The bottom section seems to have been pushed down through the floor and I can not get it to pull up and align. What can I do! It is getting cold.

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Comments

  • Jamie Hall
    Jamie Hall Member Posts: 24,556

    It takes real force to damage the wall of a pipe that way… I wonder what other damage has been done, starting right at the furnace or boiler.

    I'd much rather see you replace the whole thing — furnace or boiler to termination above the roof. That damaged section must be replaced anyway.

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,563

    Hi, I see that the two sections are disconnected, but touching. Once lined up, they should push together and then a little twist locks them together. A handyperson should be able to do this. Once in place, redo the steel strapping to hold it in place. By rights, whoever did this should put it right at no charge, but I'm not sure you want them back on the property 🫤

    Yours, Larry

    ethicalpaul
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 9,157

    Could that have been pushed down from the roof by a worker on the roof? Then they tried to pull it back up after the damage was done???

    I agree with @Jamie Hall. that needs to be inspected from the equipment connection all the way to the roof termination. With that much force one of the adjustable elbows may also be separated. The leak may be allowing carbon monoxide into the home.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • HVACNUT
    HVACNUT Member Posts: 6,238

    I hope they let you know and you didn't find that by accident.

    As mentioned, the pipe is "twist lock" but it's the pieces going through the roof that need to do the twisting. Only the penetration piece shouldn't be able to twist at all because it should be sealed around the flashing and storm collar.

    But obviously that section of roof was replaced. And the daylight means the top piece should spin like a top.

    The weight of the flue must be supported, and not by the way shown.

    I would carefully go over ALL flue joints going all the way back to the appliance(s).

    EdTheHeaterMandelcrossvLarry Weingarten

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