Elbow to p-trap space

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by javedikian, Nov 25, 2010.

  1. javedikian

    javedikian New Member

    Messages:
    10
    Location:
    Plano, TX
    I am replacing all the pipe in the slab under my shower up to the waste line. The reason, there were two 45 degree elbows that were used to vertically align the pipe with the shower drain. However, I am installing a new Kerdi shower and the 1.5" before hitting the first elbow puts the drain too high. So, I have reassembled (dry fit only for now) using 22.5 degree elbows and I also put a 1 inch height between the 90 elbow and the p-trap. Is it OK to add a little height here to lower the p-trap? I don't know how else I can get drain centered and keep it low.
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,026
    Location:
    Cave Creek, Arizona
    Use "street" 1/16 bends and you will NOT need pieces of pipe between them and the trap. But, if you can "adjust" the trap, why not just do it correctly and MOVE the trap's elbow so the trap is NOT offset from the drain? Which is what I, and most plumbers, would do.
  3. javedikian

    javedikian New Member

    Messages:
    10
    Location:
    Plano, TX
    OK, I will look into those. Ideally, I would move the elbow further back but it was difficult to even cut out the old elbow because it goes back so far under the slab. I don't think I can dig out much more without having to break up the concrete. I would like to get rid of the spacer in between the elbow and p-trap but is it against code if I end up having to keep it?
  4. javedikian

    javedikian New Member

    Messages:
    10
    Location:
    Plano, TX
    I figured out a new plan with the fewest parts and joints. Also, I forgot to mention one other snag, there is a cold water supply line running through the middle of this hole, although I could cut and re-rout. I want to extend the wate pipe 8" across to the other side of the hole, then directly into the 90 elbow and p-trap. Then I have the p-trap rotated back going in the other direction (almost a 180) which gives me a straight shot up to and aligned with the drain. This seems to be OK. Is there a limit to the degree you should rotate the p-trap on the 90 arm?
  5. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,259
    Location:
    Land of Cheese
    Given a picture it might be easier to make a recommendation.
    You cannot have soldered copper joints under a slab so rerouting the supply line might be more involved than you think.
  6. shacko

    shacko Master Plumber-Gas Fitter

    Messages:
    561
    Location:
    Rosedale, Md
    cacher_chick:

    >>>You cannot have soldered copper joints under a slab<<<

    Most areas silver solder is perfectly legal.
  7. javedikian

    javedikian New Member

    Messages:
    10
    Location:
    Plano, TX
    Here is a picture

    Is this configuration OK?
    IMG_0016.jpg
  8. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,026
    Location:
    Cave Creek, Arizona
    silver solder/brazing IS legal, but since it detempers the copper AND fittings, it is NOT a good idea if it can be avoided. You can rotate the "P" trap any direction you want to, that is why it has the "swivel" connection.
Similar Threads: Elbow p-trap
Forum Title Date
Plumbing Forum, Professional & DIY Advice Elbow between p-trap and vent? Sep 22, 2009
Plumbing Forum, Professional & DIY Advice Street Elbows Jun 26, 2014
Plumbing Forum, Professional & DIY Advice is 90 short sweep elbow allowed going down vert to horz? Jun 9, 2014
Plumbing Forum, Professional & DIY Advice Dishwasher Elbow leak Feb 10, 2014
Plumbing Forum, Professional & DIY Advice Closet bend or 90° elbow Jul 28, 2013

Share This Page