Size of Bathtub Drain

Discussion in 'Shower & Bathtub Forum & Blog' started by Blantz, Jun 9, 2021.

  1. Blantz

    Blantz New Member

    Jun 9, 2021
    The old one is rusty, so I'd like to replace it. Pulled out, the OD of the threaded portion seems to be 1-1/2". I bought a replacement that was 1-1/4" NPSM but 1-5/8"-16 UNC-2A (ordered it before measuring). Its just a little too big. I'm having difficulty finding a part that is listed as 1-1/2" OD. Does such a thing exist or do I need to have the entire drain trap replaced?
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