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out of round riser after new valve installation

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gfrbrookline
gfrbrookline Member Posts: 753
edited December 2020 in Strictly Steam
We replaced a radiator valve on a second floor unit and it is leaking steam from the threads below the valve. I am assuming this means the riser pipe became distorted at some point when the new valve was installed.

What are my options?

Comments

  • mattmia2
    mattmia2 Member Posts: 9,660
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    Probably not? Single strand wicking, teflon tape. Is it cross threaded?
  • gfrbrookline
    gfrbrookline Member Posts: 753
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    It is leaking from the back side of the the threads below the valve body.


  • gfrbrookline
    gfrbrookline Member Posts: 753
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    I am anal and make everyone wrap their valve annually to check for leaks. When I started 50% were leaking and our boiler gave out after 10 years. Don't want to go down that path again.
  • ethicalpaul
    ethicalpaul Member Posts: 5,703
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    I have ovalized some pipe in my short career in steam system repair.

    my experience tells me that if the pipe is ovalized enough for the threads to leak, you aren’t getting the fitting onto it.

    can you get some closeup pics from different angles with the paper removed?
    NJ Steam Homeowner. See my sight glass boiler videos: https://bit.ly/3sZW1el
    mattmia2
  • Jamie Hall
    Jamie Hall Member Posts: 23,313
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    I'd suggest take it off again, make sure the threads are really clean, then perhaps wicking in the root of the threads, then a few wraps -- almost enough to make it tricky to get the fitting started -- of teflon tape. I like blue monster, some folks don't. Use enough wraps to make sure that the threads are wrapped beyond where you expect the fitting to bottom. Then go for it. Don't be shy about screwing it down!
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    mattmia2ethicalpaul
  • mattmia2
    mattmia2 Member Posts: 9,660
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    Are you sure the leak isnt at the packing and running down the back where you can't see it?
    ethicalpaul