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Thread: Drainage Vent Within Attic

  1. #1
    DIY Junior Member thrashmail2002's Avatar
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    Question Drainage Vent Within Attic

    Hi,
    We are looking for new houses in CT and once we narrowed in on a house we inspected it and the inspector noted that the drainage vent pipe is terminating in the attic. Per the inspector this will cause sewer odor to collect in the attic and most importantly he mentioned that this can cause accumulation of Methane gas which can be a fire hazard. The inspector indicated that this need to terminate above the roof and atleast 6 inches above the roof.

    Here are the questions I have:
    1. The owner insist that there is a CO (Certificate of Occupancy) for this newly updated place and having a CO means that it is in line with the state code for plumbing. Is this a true statement and does the CT plumbing code allow for the vent pipe to be terminated in the attic?
    2. I went into the attic but did not get a sewer odor. I am wondering why so, especially if this is a sewer vent pipe.
    3. Is it true that Methane can build-up causing a fire hazard if the vent pipe is not terminated above the roof?

    Please let me know your thoughts. Thank you.

  2. #2
    Plumbing Contractor for 49 years johnjh2o1's Avatar
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    The inspector evidently missed the vent not being extended through the roof when he did the inspection. The vent must be extended through the roof, and in CT it must be at least 12" through the roof because of snow cover.

    John

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    DIY Junior Member thrashmail2002's Avatar
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    Hi John,
    Thank you for that reply. I guessed that would be the case. Appreciate your reply.
    Could you point me to a website/ document that cites this code for CT. I found some for ND and other states but could not pin point the section/ code for CT.
    Thanks again.

  4. #4
    Plumbing Contractor for 49 years johnjh2o1's Avatar
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    CT has a state code but that is considered the minimum code. Each town can have some of the owen add ons. I would check with the local building dept.

    John

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    DIY Junior Member thrashmail2002's Avatar
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    Ok. Thank you, John.

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