Is this considered a s-trap?

Discussion in 'General Plumbing Help' started by gagecalman, Nov 16, 2016.

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  1. Nov 16, 2016 #1

    gagecalman

    gagecalman

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    Saw this at a friends house. Trying to learn and understand.

    This tub drain goes into a 3" stack that goes thru the roof.
    Above the tub sani-tee is a toilet, then the sink before going thru the roof.
    All fixtures are within 30" of the stack.
    Is this considered a s-trap?
    Does the tub or sink need separate vents?
    Is it OK for the toilet to drain past the tub or does that create problems?
    Thanks for the help.

    Tub 2016_66.jpg
     
  2. Nov 16, 2016 #2

    SHEPLMBR

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    Not in my opinion. But you shouldn't have a union trap (trap with nut) in a confined space.
     
  3. Nov 16, 2016 #3

    johnjh2o

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    That is a full S trap.
     
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  4. Nov 16, 2016 #4

    Caduceus

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    That also looks like a 2" trap on an 1 1/2" tub waste (a 2" x 1 1/2" bushing on the inlet of the trap).
     
  5. Nov 16, 2016 #5

    gagecalman

    gagecalman

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    Is the 2" trap a problem or illegal?

    Does the tub or sink need separate vents?

    Is it OK for the toilet to drain past the tub or does that create problems?
     
  6. Nov 16, 2016 #6

    johnjh2o

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    There is no vent on the tub.
     
  7. Nov 16, 2016 #7

    Matt30

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    The 2" trap is not a problem, it's an improvement actually.

    But that is a full on s trap, no doubt about that.
     
  8. Nov 17, 2016 #8

    gagecalman

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    If the Y was removed and the trap was lowered to make a longer arm (32") into the stack would the stack wet vent the tub?

    Is it OK for the toilet to drain past the tub in the stack or does that create problems?
     
  9. Nov 17, 2016 #9

    frodo

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    Maryland is under IPC and IPC forbids wet venting below a toilet



    [​IMG]
     
  10. Nov 17, 2016 #10

    frodo

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    ....................

    s trap.jpg
     
  11. Nov 17, 2016 #11

    gagecalman

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    Would this fix it:

    Add a sani-tee to the top of the Y-1/8.
    Arm into sani-tee.
    Vent the top of the sani-tee.
     
  12. Nov 17, 2016 #12

    frodo

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    ..............

    s trap.jpg
     
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  13. Nov 17, 2016 #13

    gagecalman

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    Are the AVV's allowed/legel in Maryland?
     
  14. Nov 17, 2016 #14

    frodo

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    you are undr IPC..I THINK so, different cities have their own local codes, to be sure, contact your building department and ask for the plumbing inspector
    ask before proceeding. I think would be the prudent thing to do
     
  15. Nov 22, 2016 #15

    gagecalman

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    Good morning to all and thanks to everyone for their help especially Frodo.
    The AAV's are allowed in Baltimore. They have to meet the requirements of the IPC and it looks like the Studor brand does (Individual-and-branch-type air admittance valves shall conform to ASSE 1051).
    Thanks again and have a great day!
     
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