P trap problem, change from single to double bowl

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by pghsebring, Aug 3, 2011.

  1. pghsebring

    pghsebring DIY Member

    Messages:
    97
    Location:
    Ohio
    The problem is this: when you go from a single to a double bowl, neither of the two drains end up directly in front of the hole in the wall. The "U" of the ptrap isn't long enough to make it so the flat leg of the P can fit straight into the wall - i'm short about an inch of travel from either bowl, the hole in the wall is exactly in the middle.

    What do you guys do in this case? Do the box stores stock longer "U" sections of P traps, or is there some sort of offset used at some point? Maybe a 45 on the flat leg into the wall? What's the preferred solution you go with when confronted with the hole in the wall being offset too far from the drain of the sink for a standard P trap to reach?

    Thanks in advance.
  2. pghsebring

    pghsebring DIY Member

    Messages:
    97
    Location:
    Ohio
    Ok, let's try this again.

    Normally your stub out is directly behind the sink drain.

    Mine is offset 4" to the left.

    Any normal P-trap only allows for 3" of offset.

    What do?
  3. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Messages:
    1,143
    Location:
    South*East
    With out seeing it you can either offset the waste line or use a center outlet waste.

    John
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,615
    Location:
    Cave Creek, Arizona
    quote; Do you have seprate waste arms for each sink,each must have it`s own waste and trap

    You do NOT NEED to have separate traps for each sink. In fact very FEW sinks are installed that way, and then only because of special conditions. You can either offset the drain towards the closest drain opening, or use a center outlet continuous waste, assuming you do not have a garbage disposer.
  5. cwhyu2

    cwhyu2 Consultant

    Messages:
    1,347
    Location:
    Cincinnati OH
    Sorry,I was thinking lav sinks he did not mention K/S.Above posts are cool disregard mine.
    Deleted other post so not to get others confused.
    Guess I need stronger glasses.
    Last edited: Aug 4, 2011
  6. pghsebring

    pghsebring DIY Member

    Messages:
    97
    Location:
    Ohio
    Two stub outs in wall.

    One lines up, that one is done, the other doesn't. What would you do?

    What is this "offset"? Picture available?
  7. cwhyu2

    cwhyu2 Consultant

    Messages:
    1,347
    Location:
    Cincinnati OH
    221/2 ell you should be cool.
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