Basement floor drain extender?

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by Hotbacon, Jun 18, 2012.

  1. Hotbacon

    Hotbacon New Member

    Messages:
    31
    Location:
    Shillington, PA
    What is the typical way to raise a basement floor drain when a subfloor and finish floor are installed? I see the big boxes have floor drain extenders that will raise the drain 1/4" - 1/2", but they are for 3" drains. Sounds like this is for tiling a shower.

    My drain is 4" cast iron and I'll need to bring it up ~1.25" (7/8" DriCore + 3/8" laminate floor).
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,529
    Location:
    Cave Creek, Arizona
    THere is no "typical way to extend it", because there is no "typical" floor drain. If it is cast iron, the strainer may unscrew to raise it, but that is only one way to change the elevation, assuming it is the "correct" type of cast iron drain. With other drains there is NO way to raise them properly. You have to do some creative handyman work.
  3. Winslow

    Winslow Plumber

    Messages:
    450
    Location:
    Hawaii
    What are you measuring that is 4"? Is that the size of the grate, the threads on the strainer, or the body of the valve?
  4. Hotbacon

    Hotbacon New Member

    Messages:
    31
    Location:
    Shillington, PA
    Apparently my memory was way off. The grate of the floor drain is about 7 3/8" diameter (not 4"), and it fits inside the rim of the drain that is flush w/ the surface of the concrete slab. Under the grate is the drain and a cleanout.

    http://share.shutterfly.com/share/received/welcome.sfly?fid=cf20758c6041479f6cbbd47cbb382743&sid=0AaNGjlo4cNWTrY

    Any ideas on how to neatly raise this drain cover would be welcome. Currently my best idea is to just get another grate and install it on top of the finished floor (double grated drain).
    Last edited: Jun 26, 2012
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,529
    Location:
    Cave Creek, Arizona
    A picture of the cover is useless, because if it can be raised you have to do something with the drain itself. From the little you show of it, however, it appears to be a "one piece" body which has NO provison for adjustment. IF that is the case, all you can do is cobble up some type of riser. A better picture might revise that estimate however.
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