cast iron closet flange leaded into pvc

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by timbo0876, Aug 9, 2014.

?

can I remove a leaded cast iron flange from pvc pipe in the same manner as usual

  1. yes

    1 vote(s)
    100.0%
  2. no

    0 vote(s)
    0.0%
  1. timbo0876

    timbo0876 New Member

    Messages:
    4
    I have a cast iron flange on my Toilet and it is leaded into a pvc I want to drill the lead out and break the flange ring..My concern having never seen this is well it be possible to re use the pvc pipe or should I plan on busting up the concrete to make repairs
  2. fullysprinklered

    fullysprinklered Member

    Messages:
    197
    Location:
    Georgia
    What's wrong with it?
  3. timbo0876

    timbo0876 New Member

    Messages:
    4
    The ring is severely rusted and I want to retile the floor and I don't think a repair ring and spacer would be a proper repair
  4. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,225
    Location:
    Maine
    It's one of those won't know until you try things but yes, drill the lead out
  5. Smooky

    Smooky Member

    Messages:
    624
    Location:
    NC
    Are you sure it is leaded onto the PVC? That seems rather unlikely since lead has a higher melting point than PVC pipe. Maybe it is some type of compression flange.
  6. asktom

    asktom Member

    Messages:
    575
    Location:
    Victor, MT
    The cast iron will absorb the heat before the plastic melts, at least it does when caulking plastic pipe into a cast iron hub - I never tried a closet ring, which has less mass. However, plastic pipe has a larger OD than cast iron and I don't see how the ring could fit over it unless the ring had been modified.
  7. timbo0876

    timbo0876 New Member

    Messages:
    4
    Yes it's definitely leaded into the pvc I cleaned up all the grime and wax and sure enough it's lead
  8. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,815
    Location:
    Cave Creek, Arizona
    Cast iron not only does NOT absorb the heat, but it holds it for a long time after the lead is poured. Cast iron rings/flanges ALL are rusty, but that has nothing to do with them needing to be changed. If you drill the lead, you will probably damage the PVC and have to change it. Break the flange and then just slide the lead off the PVC.
  9. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,225
    Location:
    Maine
    The PVC is not going to be usable anyway whether you break the flange or drill the lead. Unless there's room for a Fernco the PVC will be partially melted and too rough to glue another flange to.
  10. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,815
    Location:
    Cave Creek, Arizona
    Do it first, and THEN decide if the PVC is usable or not.
  11. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,815
    Location:
    Cave Creek, Arizona
    Do it first, and THEN decide if the PVC is usable or not.
  12. fullysprinklered

    fullysprinklered Member

    Messages:
    197
    Location:
    Georgia
    Last edited: Aug 12, 2014
  13. Reach4

    Reach4 Well-Known Member

    Messages:
    2,401
    Location:
    IL
    If the PVC is 4 inch, and the leaded flange is on the outside, then a flange, with a metal rin that fits to the inside of the 4-inch PVC could be an easy option. They even make closet flanges to go inside 3 inch PVC, but those are not so well regarded.
  14. timbo0876

    timbo0876 New Member

    Messages:
    4
    Yes the cast iron flange is on the outside of the pvc. It also looks like when they made the up turn with the elbow and used a short piece of pvc pipe I could cut that out and just glue another in it's stead
  15. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,815
    Location:
    Cave Creek, Arizona
    ALL cast iron flanges are "rusty", but that in way way means they have to be replaced. I replace them when they are cracked, and ONLY if they are cracked.
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