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  1. #1
    Nick Builder's Avatar
    Nick Builder Guest

    Unhappy Double Trap, Pre-existing

    I have a situation where a p-trap was placed for the bath tub and 2 feet later the water enters a drum trap. The general building inspector says it was double trapped! It was all existing prior to the floor being opened yet I am being forced to change it anyway.

    It is much easier to cut out the p-trap and leave the drum trap, however this will result in the vent being in front of the drum trap....

    The never ending question, can I vent in front of the trap?

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    Crawl Space Creeper

  2. #2
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Double Trap, Pre-existing

    Nick,

    Leave the P trap, remove the drum trap.

    The vent needs to be after the trap and drum traps are, to my knowledge, no longer allowed.

    From the IRC.
    - P3201.5 Prohibited trap designs.
    The following types of traps are prohibited:
    - - 1. Bell traps.
    - - 2. Separate fixture traps with interior partitions, except those lavatory traps made of plastic, stainless steel or other corrosion-resistant material.
    - - 3. ā€œSā€ traps.
    - - 4. Drum traps.
    - - 5. Trap designs with moving parts.



    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  3. #3
    Join Date
    Mar 2007
    Location
    Healdsburg, CA
    Posts
    1,741

    Default Re: Double Trap, Pre-existing

    Drum Traps and what they look like.

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    Jerry McCarthy
    Building Code/ Construction Consultant

  4. #4
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Double Trap, Pre-existing

    Jerry Mc.,

    Thanks, I've seen photos of the type in the second photo, but had not seen any like that shown in the first photo.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  5. #5
    stanley clark's Avatar
    stanley clark Guest

    Question Re: Double Trap, Pre-existing

    this is a question about drum traps.I have one that is I believe brass and have removed the plug to look inside but its to dirty to see any thing,but it feels like when I put a screw driver in it that there is a plate half way down.Is this some type of screen to catch debris and can it be removed to clean under it.Thanks for any answers. Stan


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