'Nuther S-Trap Dilemma

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Triumph TT, Jun 9, 2014.

  1. Triumph TT

    Triumph TT New Member

    Messages:
    3
    Location:
    Quebec
    *I posted this in the Canadian Plumbing Code Forum as well but thought I may get more replies here.

    I just finished dry fitting our his/her sink plumbing in the master bath. A friend "apprentice" plumber chimed in to say it is no good. I know S-Traps are no-no's but properly vented may pass inspection??? The vent also picks up the shower and tub under the floor.

    Am I good to glue or not? Thanks in advance for the expertise.


    [​IMG]
    Last edited by a moderator: Jun 9, 2014
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,129
    Location:
    Bothell, Washington
    That is totally wrong.

    The vent for the lavs will come off above the trap arm, not below.
    The revent is at 42" above the floor. You can't run a dry vent below the flood level of the fixtures being served.
    The trap goes into a vertical santee, with the vent out the top, reventing at 42" above the floor.

    Now I need to rest my eyes. It hurt looking at that. :)

    [​IMG]
    Last edited: Jun 9, 2014
  3. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,227
    Location:
    Maine
    Pic of the year, maybe the decade. Can't stop laughing.
  4. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,359
    Location:
    Yakima WA
    What's the "dilemma"? You seem know what an S trap is and that they are illegal, so why don't you know what makes them illegal? This is not advance plumbing, you have to vent after the P trap and before there is a downward turn, and all fixtures need a trap. I don't think Canadian codes are different on this.
  5. Triumph TT

    Triumph TT New Member

    Messages:
    3
    Location:
    Quebec
    Thanks for the advice. I will reconfigure and post again when I get a chance. Had a few that night and went ahead and started without my plumber, trying to get ahead of him.

    Didn't realize how much people like to hear themselves type in these places. That aside, these are for the most part where some of the best in the business hang and I appreciate your advice.

    Cheers.
  6. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,359
    Location:
    Yakima WA
    Another thing. You can't really dry fit ABS or PVC. These use an interference fit which means the pieces do not bottom out. If you drive the fittings on, you will have a very difficult time separating them. You apply the proper "glue" and the the pieces will slide together. Hold them in position for a few seconds will the glue has time to begin to set up. It's a cut and fit as you go. I'd be willing to bet that your plumber would rather you stay out of his way.
  7. Terry

    Terry Administrator Staff Member

    Messages:
    15,129
    Location:
    Bothell, Washington
    Gary, it's a good point about the interference fit, and not being able to dry fit them first.
    However, part of the fun of this stuff is learning and trying things.

    And yes. When I worked in a bicycle shop years ago, we had three rates.
    One for us doing the work.
    A little more if you watched, and even more if you helped. :)

    Whenever I brought on a new helper, it always slowed us down until they leaned enough to work on their own. It was never faster.
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