Tapping Threads in exisiting Risers with Pipe In Place

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by chefwong, Nov 14, 2013.

  1. chefwong

    chefwong Member

    Jun 14, 2006
    District of Columbia
    Anyone of you ever tap threads onto riser feeds that are in place......

    Option A: Not the Preferred Option just due to where the starting height would be.
    Put Female Copper Adapter and start fresh from the high height of where I would adapt to....

    Option B: Risers in wall of 2nd floor.
    Cut brass risers to preferred height of starting point
    Tap threads on risers while holding the pipe with a pipe wrench
    Hope the *torque* produced does not affect anything downstream

    I have done tons of theading on the vise, but never with pipe in *place* in the walls - all willy nilly in the air
    Last edited: Nov 14, 2013
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona
    TEchnically, you are using a "thread die" not a "tap", and any plumber has threaded pipes in place at some time in their life. Not an easy task if you are doing it "by hand".
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