Toilet Drain

Discussion in 'General Plumbing Help' started by arky217, Oct 10, 2012.

  1. Oct 10, 2012 #1

    arky217

    arky217

    arky217

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    Which of these is the best configuration for a toilet drain ?

    Going to assume that C is incorrect because of no immediate vent pipe; that leaves A or B.
    Which one would be the best configuration ?

    Thanks,
    Arky

    [​IMG]
     
  2. Oct 10, 2012 #2

    leonandlisa

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    B is the best.

    Leon
     
  3. Oct 10, 2012 #3

    johnjh2o

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    A is the best. Using a Y is always better then a sanitary tee.

    john
     
  4. Oct 10, 2012 #4

    arky217

    arky217

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    I've posted this on several other forums and so far, the B's have outnumbered the A's.

    The A proponents mostly say that it's a straighter shot, thus less chance of clogs.

    The B proponents say that the A allows too much rush of water, thus restricting the vent.

    I'm still 'up in the air' about which one to go with, but, not being a plumber,
    if left to my own impression, I would probably have chosen A.

    Anyone have a strong argument for either ?

    Thanks,
    Arky
     
  5. Oct 11, 2012 #5

    stevemachine

    stevemachine

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    I agree with A, and John. A wye is way better than a t wye. However you have to remember that the fall of the pipe shouldn't be more than one pipe diameter before it reachs it's vent. I say Pipe it like B but then use a wye and fitting 45 instead of a t wye. Just my two cents though.
     
  6. Oct 11, 2012 #6

    phishfood

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    Actually, under 2007 and later International Plumbing Code, there is no distance to vent limitations on a self siphoning fixture such as a water closet, since the fixture is designed to siphon the trap, and is designed with a means to refill the trap afterwords.

    So I would vote for A as well.
     
  7. Oct 11, 2012 #7

    stevemachine

    stevemachine

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    Touché phish. I see your point. I guess what I've learnt according to our code was that you couldn't have the fall exceed the one pipe diameter, we cant do it in my region from my knowledge, but it totally makes sense what your saying.
     
  8. Oct 11, 2012 #8

    PioneerPlumber

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    Definitely A. However, my first thought would be that you're now at a deeper elevation thus requiring a deeper excavation. Because **** runs downhill, the remaining portion of the downstream system will now be progressively deeper.

    If fall is not an issue, install like "A". Regardless of what the traditionally or most common application is, A is better.

    Put a full size clean out above grade to allow for future snaking with a full size head. 3" piping/3" clean out, etc.

    And pardon my French. I'm a Plumber :)
     
  9. Oct 16, 2012 #9

    arky217

    arky217

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    In the following picture, assuming that the 'other drainage' pipe cannot be moved, which would be the better arrangement, A or B ?

    Thanks,
    Arky

    toilets (600 x 322).jpg
     
  10. Oct 16, 2012 #10

    stevemachine

    stevemachine

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    B in my opinion. Especially if the other plumbing is vented through the stack. Toilet needs to be the lowest connected fixture on a wet vent.
     
  11. Oct 17, 2012 #11

    phishfood

    phishfood

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    What is connected to the line marked "other drainage", and is it vented through something other than the vent stack in the picture?
     
  12. Oct 20, 2012 #12

    arky217

    arky217

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    One last time on the toilet drain.
    Because of obstructions and space limitations, I need to have the toilet drain into the
    stack lower than the tub and sink.
    Would there be any potential problems with this arrangement, that is, having the sink and tub drain into the stack about a foot above the toilet inlet ?

    [​IMG]

    Thanks,
    Arky
     
  13. Oct 20, 2012 #13

    stevemachine

    stevemachine

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    In my opinion that's totally fine to do like you have it posted. Don't see any issues at all
     
  14. Oct 21, 2012 #14

    phishfood

    phishfood

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    I agree, no problem there at all.
     

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