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Thread: Side draining bath tub

  1. #1

    Default Side draining bath tub

    I need to install bathtub on the floor where ther is no space for P-trap.

    How far from a tub drain can the trap be located?

    That is, can I run a horizontal drain for 3 feet (at about 1 inch drop) and install a P-trap and a vent 3 feet away from the tub drain?

    Or is it asking for trouble?

  2. #2
    Plumbing Designer FloridaOrange's Avatar
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    Trap must be below the fixture drain.
    Matt
    Semi-professional plumbing designer
    Enjoying life in SW Florida

  3. #3
    Homeowner geniescience's Avatar
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    ?

    I paid a Master Plumber and he installed the P trap 3 feet away.

    I don't think "code" requires it to be under the tub drain.

    A couple years ago I installed a sink Ptrap a few feet away from the sink drain and I got input here from hj terry and others on how to do it.

  4. #4
    Plumbing Designer FloridaOrange's Avatar
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    Quote Originally Posted by geniescience View Post
    ?

    I paid a Master Plumber and he installed the P trap 3 feet away.

    I don't think "code" requires it to be under the tub drain.

    A couple years ago I installed a sink Ptrap a few feet away from the sink drain and I got input here from hj terry and others on how to do it.
    You're right, I looked back at the code again.
    This is 2009 Florida Plumbing Code, it is similar and sometimes identical to the IPC.

    1002.1 Fixture traps. Each plumbing fixture shall be separately trapped by a water-seal trap, except as otherwise permitted by this code. The vertical distance from the fixture outlet to the trap weir shall not exceed 24 inches (610 mm) and the horizontal distance shall not exceed 30 inches (610 mm) measured from the centerline of the fixture outlet to the centerline of the inlet of the trap
    Matt
    Semi-professional plumbing designer
    Enjoying life in SW Florida

  5. #5

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    Quote Originally Posted by FloridaOrange View Post
    You're right, I looked back at the code again.
    This is 2009 Florida Plumbing Code, it is similar and sometimes identical to the IPC.

    1002.1 Fixture traps. Each plumbing fixture shall be separately trapped by a water-seal trap, except as otherwise permitted by this code. The vertical distance from the fixture outlet to the trap weir shall not exceed 24 inches (610 mm) and the horizontal distance shall not exceed 30 inches (610 mm) measured from the centerline of the fixture outlet to the centerline of the inlet of the trap
    Thanks, that looks encouraging.

    Besides violating the Florida Plumbing code by 6 inches, what problems can I encounter by placing the trap 3 feet away?

  6. #6
    Retired Defense Industry Engineer jadnashua's Avatar
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    There will be a (hopefully small) accumulation of soap scum, body oils, dead skin, etc. build-up on the walls of the pipe. 3' of that can smell pretty raunchy. That's why the better location for the trap is right under the fixture...the water in the trap blocks not only traditional sewer gasses, but the smells from the drain line going there.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  7. #7
    Plumbing Designer FloridaOrange's Avatar
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    Quote Originally Posted by ej43 View Post
    Besides violating the Florida Plumbing code by 6 inches, what problems can I encounter by placing the trap 3 feet away?
    Are you in Florida? Your location or jurisdiction might differ.
    Matt
    Semi-professional plumbing designer
    Enjoying life in SW Florida

  8. #8

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    Quote Originally Posted by jadnashua View Post
    There will be a (hopefully small) accumulation of soap scum, body oils, dead skin, etc. build-up on the walls of the pipe. 3' of that can smell pretty raunchy. That's why the better location for the trap is right under the fixture...the water in the trap blocks not only traditional sewer gasses, but the smells from the drain line going there.
    Good point.
    How would I clean the pipe?

    BTW, not sure if it is important here, but everything will be draining into the sewage ejection system and then pumped up.

  9. #9
    Homeowner geniescience's Avatar
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    30 inches is 762 mm. A limit has to be imposed at some point. Stretching it is a normal human endeavor.

    If this quote was retyped, it's data entry error.
    If it's copied, it's a typo in the original document.
    24 inches (610 mm)
    30 inches (610 mm)
    If I were you, I'd measure everything in metric and allow myself a margin of error in my favor.

  10. #10
    Illinois Licensed Plumber SewerRatz's Avatar
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    Default 24" in Illinois

    Distance of Trap to Fixture. The developed length from the fixture outlet to the trap weir shall not exceed 24 inches, except when an interceptor is used as a trap, it shall be located as close as possible to the fixture. The maximum developed length from the fixture outlet to the inlet of the interceptor shall not exceed 5 feet. (See Appendix D: Illustration B.) The standpipe inlet for an automatic clothes washer shall not exceed 48 inches above the weir of a trap.

    So your best bet is to contact your local building department and ask the plumbing inspector there what they require locally. State codes are the bare minimum, which means counties, townships, and cities can make the code even tougher.
    Last edited by SewerRatz; 06-05-2009 at 05:10 PM. Reason: Add a blurb

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