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Thread: Banded Clamp

  1. #1

    Default Banded Clamp

    I am tapping into my main indoor drain for a basement toilet. And I could use to banded clamps, however my preference would be to use a regular coupler on one side and a rubber on the other but getting the gap to zero is vituallly impossible. How big a gap is allowed when using a 4" banded clamp?

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Aug 2004
    Bothell, Washington
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    You normally add 1/4" for the band.

    If the fitting is 9-3/4", you cut out 10"

  3. #3


    Terry Sorry I am a newbie.
    Not sure I follow. I have a 4x4x3 Wye fitting going into this gap and I would like to glue one side in and align the other side as close as possible to the pipe using a clamp, however during my dry fit I cannot get one side in to glue without at least a 1/2 '' gap. Is this too big?

  4. #4
    Questions from readers Guest's Avatar
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    Nov 2005
    posts, emails and comments from readers reposted by Terry


    I don't think you can glue one side and make it work.
    When I"m cutting in a wye, or any fitting for that matter, into a "fixed in place" line, I use two couplings.

  5. #5
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default connection

    Unless one side or the other is able to be flexed out of the way, there is no way you will install your Y by gluing one side and then a conventional band on the other.

  6. #6


    Thx I will do two clamps, However here is a twist. I am reducing from a 4"PVC to a 3"ABS at the WYE and I am less comfortable (after the numerous threads on this forum) about using transition glue. Would a third clamp be okay?


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