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  1. #1
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    Default Oil Filter looking device in Waste line?

    Inspected a 1959 single story ranch this morning. In the waste plumbing were some sort of device about the size of a quart coffe can that looked kinda like an oil filter for an engine.

    They were oozing gunk and were completely rusted. They are past their serviceable life span but what service did they provide?

    Any idea what they might have been?

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  2. #2
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    Default Re: Oil Filter looking device in Waste line?

    Probably a grease trap.

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  3. #3
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    Default Re: Oil Filter looking device in Waste line?

    That's a drum trap.
    They are no longer used. But it does not have to be removed. When it has to be replaced, it must be replaced with a P Trap.
    You said 1959, I thought the drum traps were much older than that (30's). Does anyone know when they stopped using them?

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  4. #4
    Michael Larson's Avatar
    Michael Larson Guest

    Default Re: Oil Filter looking device in Waste line?

    Yes it's a drum trap.

    They are still available for purchase but not code in most jurisdictions.

    Drum Trap

    UPC (Uniform Plumbing Code) generally prohibits drum traps.
    1004.0 Traps – Prohibited.
    No form of trap which depends for its seal upon the action of
    movable parts shall be used. No trap which has concealed
    interior partitions, except those of plastic, glass-or similar corrosion-
    resisting material, shall be used. "S" traps, bell traps,
    and crown-vented traps shall be prohibited. No fixture shall
    be double trapped. Drum and bottle traps may be installed
    only when permitted by the Authority Having Jurisdiction for
    special conditions. No trap shall be installed without a vent,
    except as otherwise provided in this Code.


  5. #5
    Kevin Barre's Avatar
    Kevin Barre Guest

    Default Re: Oil Filter looking device in Waste line?

    The drum traps I see around here are typically lead construction -- as are the drains into them. The one I saw this morning was in a home built in the late 1940's or very early 1950's. I haven't seen any after that time period.


  6. #6
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    Default Re: Oil Filter looking device in Waste line?

    Quote Originally Posted by Michael Larson View Post
    Yes it's a drum trap.

    They are still available for purchase but not code in most jurisdictions.
    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
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  7. #7
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    Default Re: Oil Filter looking device in Waste line?

    OK, before I get riddled with bullets and go down in flames, I'm going to do a sidestep here.
    I think that's a drum trap.
    But it looks a little different than the drum traps I've seen (not that I've seen that many). The traps I've seen have the inlet and outlet on the sides and a access cover on top. This may be a variation.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  8. #8
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    Default Re: Oil Filter looking device in Waste line?

    Jerry
    I'm not familiar with a bell trap, can you explain?

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  9. #9
    Join Date
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    Default Re: Oil Filter looking device in Waste line?

    Attached is my drawing of a bell trap.

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  10. #10
    Join Date
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    Default Re: Oil Filter looking device in Waste line?

    Thanks for the quick Id.

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