Help me identify odd PVC coupling.

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by Giles, Dec 6, 2008.

  1. Giles

    Giles Retired tool & Die and Mechanic

    Messages:
    112
    Location:
    N.W. Alabama--Florence--
    While repairing outside plumbing to my well pump. I got into a predictiment that I cannot figure out. In my supplies, I had a 1" PVC coupling and have no idea where it was purchased.
    The coupling has the same outside diameter the full length but it has provisions for tightening with a large wrench and also has ribbs for tightening with pliers.
    The coupling has NO THREADS.
    Markings on the fittings are--PVC 1-1 D2466 1 1/4-1 Sch 40.

    The outside diameter of a 1" PVC pipe is 1 5/16"
    The O.D. of a 1 1/4" pipe is 1 5/8"

    The I.D. of one end of this fitting is correct for a 1" pipe but the other end is 1.370" (slightly under 1 3/8")

    Since I have completed the repair, I am not greatly concerned about this fitting but was just wondering what kind of fitting is this?
    Is it some kind of special fitting or just a screw-up in manufacturing?

    I will try to post a picture later.
  2. Bill Arden

    Bill Arden Computer Programmer

    Messages:
    584
    Location:
    MN, USA
    Possibilities (not in any order)
    1. Thinwall PVC
    2. CPVC to PVC adapter
  3. Giles

    Giles Retired tool & Die and Mechanic

    Messages:
    112
    Location:
    N.W. Alabama--Florence--

    Thanks Bill---To my limited knowledge ,different schedule pipe has the same O.D., with a smaller I.D.
    I considered it might be a CPVC to PVC adapter but I don't know of a CPVC pipe with this O.D. This could be a possibality.
  4. mattbee24

    mattbee24 In the Trades

    Messages:
    100
    Location:
    Fremont, OH
    1-1/4 cpvc (schedule 40) measures 1-3/8 od. It is the same size as copper. So you might have a pvc to cpvc adapter there.
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,510
    Location:
    Cave Creek, Arizona
    Pvc

    If it is PVC and has not threads it would not be to connect to copper, OR CPVC. And pipes with various wall thicknesses change the i.d. of the pipe, not the o.d.
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