Removing PVC threaded section from cast iron

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Indy_Keith, Apr 30, 2010.

  1. Indy_Keith

    Indy_Keith New Member

    Joined:
    Apr 30, 2010
    Location:
    Indianapolis
    While repairing the subflooring, I slipped and fell on the PVC drain line that runs from the shower to the main sewer line (cast iron). The PVC/cast iron connection is threaded. The pvc broke right at the sewer line and there is noting to grab onto the unthread the PVC. What is the best way to get the PVC threaded section out of there?

    Thank you

    Keith
     
  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Joined:
    Jan 5, 2008
    Occupation:
    Test, Don't Guess!
    Location:
    Land of Cheese
    Carefully cut the pvc cross-section in a couple of locations with a hack-saw blade so it is part way through and
    then split it inward with a chisel and hammer.

    or

    Just use the chisel and hammer to rotate the remaining pvc counter-clockwise to remove it.

    Use care to not damage the threads in the iron.
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    Heat a screwdriver blade red hot, and "melt" a groove in the side of the plastic all the way down to the cast iron. You will have to reheat the blade a time or two. Once that is done the piece will "collapse" inward and you can twist it out.
     
  5. Indy_Keith

    Indy_Keith New Member

    Joined:
    Apr 30, 2010
    Location:
    Indianapolis
    Thank you, both.

    Keith
     
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