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  3. For a bathroom sink, is it acceptable to angle a P Trap arm downwards, in order to give more clearance underneath?

For a bathroom sink, is it acceptable to angle a P Trap arm downwards, in order to give more clearance underneath?

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  • R This user is from outside of this forum
    R This user is from outside of this forum
    [email protected]
    wrote on last edited by
    #1

    Installing a new vanity, and like idiots, we forgot to account for a floating cabinet when plumbing hookups went in, so the drain outlets have about 3-4 inches clearance below, but there's plenty of space otherwise. The plan is actually to try some waterless valve traps anyway, but if we don't like them, or there's some future inspection issue, can it simply be sloped up at a 1/4 -1/2 in grade? Maybe also with some bends to save space?

    My plumber comes to install in a few days, and I'd like to know how much of an idiot he'll call me

    K A 2 Replies Last reply
    1
    • R [email protected]

      Installing a new vanity, and like idiots, we forgot to account for a floating cabinet when plumbing hookups went in, so the drain outlets have about 3-4 inches clearance below, but there's plenty of space otherwise. The plan is actually to try some waterless valve traps anyway, but if we don't like them, or there's some future inspection issue, can it simply be sloped up at a 1/4 -1/2 in grade? Maybe also with some bends to save space?

      My plumber comes to install in a few days, and I'd like to know how much of an idiot he'll call me

      K This user is from outside of this forum
      K This user is from outside of this forum
      [email protected]
      wrote on last edited by
      #2

      @[email protected] based on the image, I think a bottle trap would work and be to code most places.

      https://tapron.co.uk/blogs/news/bottle-trap-vs-p-trap-choosing-right-plumbing-component

      R 1 Reply Last reply
      0
      • K [email protected]

        @[email protected] based on the image, I think a bottle trap would work and be to code most places.

        https://tapron.co.uk/blogs/news/bottle-trap-vs-p-trap-choosing-right-plumbing-component

        R This user is from outside of this forum
        R This user is from outside of this forum
        [email protected]
        wrote on last edited by [email protected]
        #3

        Really? It seemed to be against code in most places near me, along with S traps. I don't live in the UK.

        K S 2 Replies Last reply
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        • R [email protected]

          Really? It seemed to be against code in most places near me, along with S traps. I don't live in the UK.

          K This user is from outside of this forum
          K This user is from outside of this forum
          [email protected]
          wrote on last edited by
          #4

          @[email protected] you are correct. After researching this for just 5 minutes, I was definitely mis-informed. It's shocking that so many brands sell very expensive versions of this like https://www.kohler.com/en/products/bathroom-accessories/shop-bathroom-accessories/bottle-trap-1-1-4-x-1-1-4-9033.

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          • R [email protected]

            Installing a new vanity, and like idiots, we forgot to account for a floating cabinet when plumbing hookups went in, so the drain outlets have about 3-4 inches clearance below, but there's plenty of space otherwise. The plan is actually to try some waterless valve traps anyway, but if we don't like them, or there's some future inspection issue, can it simply be sloped up at a 1/4 -1/2 in grade? Maybe also with some bends to save space?

            My plumber comes to install in a few days, and I'd like to know how much of an idiot he'll call me

            A This user is from outside of this forum
            A This user is from outside of this forum
            [email protected]
            wrote on last edited by
            #5

            You need to either open up the wall in that bathroom or on the other side and rough the sanitary line in at the proper height. Don't fuck around and try to reinvent the wheel when it comes to plumbing, it never works. This shit was figured out long before we got on earth by far more intelligent people than we will ever be

            R 1 Reply Last reply
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            • R [email protected]

              Really? It seemed to be against code in most places near me, along with S traps. I don't live in the UK.

              S This user is from outside of this forum
              S This user is from outside of this forum
              [email protected]
              wrote on last edited by
              #6

              That's crazy. We have quite strict codes when it vomes to plumbing and we use them for a long time.

              1 Reply Last reply
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              • K [email protected]

                @[email protected] you are correct. After researching this for just 5 minutes, I was definitely mis-informed. It's shocking that so many brands sell very expensive versions of this like https://www.kohler.com/en/products/bathroom-accessories/shop-bathroom-accessories/bottle-trap-1-1-4-x-1-1-4-9033.

                R This user is from outside of this forum
                R This user is from outside of this forum
                [email protected]
                wrote on last edited by [email protected]
                #7

                No worries, I went through the exact same process a couple weeks ago.

                It seems theyre legal in some parts, but there should definitely be a disclaimer, or cigarette style warning included. "Bottle traps may cause inspection failure."

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                • A [email protected]

                  You need to either open up the wall in that bathroom or on the other side and rough the sanitary line in at the proper height. Don't fuck around and try to reinvent the wheel when it comes to plumbing, it never works. This shit was figured out long before we got on earth by far more intelligent people than we will ever be

                  R This user is from outside of this forum
                  R This user is from outside of this forum
                  [email protected]
                  wrote on last edited by [email protected]
                  #8

                  I don't think sloping a pipe downwards at a 2% grade is exactly reinventing the wheel, but tearing the other side open isn't out of the question.

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                  • R [email protected]

                    I don't think sloping a pipe downwards at a 2% grade is exactly reinventing the wheel, but tearing the other side open isn't out of the question.

                    A This user is from outside of this forum
                    A This user is from outside of this forum
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                    wrote on last edited by
                    #9

                    If is is not carrying solids i agree but the problem would be going beyond the acceptable tollerances of the mechanical joints and glue joints of the fittings.

                    I have seen too many times something that is forced cause major damage. The cabinetry looks nice and rather than take the time while it is not at the point of no return to make it correct would be foolish. Sometimes you need to drop back and punt 🤷‍♂️

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                    • A [email protected]

                      If is is not carrying solids i agree but the problem would be going beyond the acceptable tollerances of the mechanical joints and glue joints of the fittings.

                      I have seen too many times something that is forced cause major damage. The cabinetry looks nice and rather than take the time while it is not at the point of no return to make it correct would be foolish. Sometimes you need to drop back and punt 🤷‍♂️

                      R This user is from outside of this forum
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                      wrote on last edited by [email protected]
                      #10

                      Oh ok. I was going off the assumption there was a joint meant for this, or something with some give, or I dunno maybe a heat gun? I wasn't thinking it would just be forced.

                      And no solids, it's just a master bathroom sink with no kids, so mostly soap and germs.

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