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  1. #1
    Join Date
    Mar 2010

    Default Hooking up a bathroom vent to a roof vent

    I am trying to hook a bathroom vent pipe to a roof pipe vent jack. Last Summer I had the roofing set up a vent for the bathroom exhaust. He put in what looks like a code cap and base. At the time there was no bathroom exhaust vent. Now, I am trying to install it and the plywood is cut out for a 4" duct ( like it should be) but the code base looks like it is for a 6" vent pipe. Is there anu adapters out there that are a 6" vent ouside diameter and have a 4" vent pipe in the inside. This way I could seal the pipe at the code base, but still use the plywood hole that is already cut out in the plywood. Any ideas. I will attempt to attach a picture.
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  2. #2
    Join Date
    Aug 2007
    The Great White North

    Default Re: Hooking up a bathroom vent to a roof vent

    4" > 6" reducer/adaptors are commonly available wherever HVAC ducting is sold.
    "" an ounce of perception -- a pound of obscure "
    - Rush

  3. #3
    Join Date
    Aug 2007

    Default Re: Hooking up a bathroom vent to a roof vent

    In these parts, the size of the hole under the flashing cap is inconsequential. The worst it will do is aid in venting the attic.
    I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!

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