3" copper to 3" PVC DWV transition

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Gregkl, Jan 13, 2020.

  1. Gregkl

    Gregkl New Member

    Nov 19, 2019
    I am replacing some of my copper main drain line due to a reconfiguration of my bathrooms. I moved the toilet flanges approx 2" to meet code and moved my venting due to losing the original wall the vent stack was in.

    When I went into the crawlspace to connect my PVC to the original copper via Fernco, the PVC is offset slightly from the copper.

    My questions and concerns are:
    1. Is is possible to have a little angle at the Fernco between the two pipes?
    2. How can I get it to line up perfectly if that is what is needed? I am about 1" out of alignment. I was thinking I could try a couple 22 1/2 fittings but that might move it out too much.
    3. Am I overthinking this as usual? Just torque the screws on the Fernco and move on?
    4. Is there another solution?

    Thanks. I did a search but didn't find a post with this same issue.
  2. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    They make couplings that match both sides.
    Copper to plastic
    Copper to old cast
    old cast to plastic

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