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  1. #1
    Join Date
    Jul 2009
    Location
    Spokane, WA
    Posts
    116

    Default Code for vent pipe slope

    Believe it or not the seller says she will fix a negative sloping furnace vent pipe connector only if I can provide the code for it. I do not recite codes in my reports but use diagrams to illustrate the 1/4 inch per foot slope upward away from the furnace. I'm sure someone here knows it off the top of their head. Thanks for the help.

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  2. #2
    Join Date
    Apr 2011
    Location
    Bozeman, Montana
    Posts
    91

    Default Re: Code for vent pipe slope

    Quote Originally Posted by Bill Anglin View Post
    Believe it or not the seller says she will fix a negative sloping furnace vent pipe connector only if I can provide the code for it. I do not recite codes in my reports but use diagrams to illustrate the 1/4 inch per foot slope upward away from the furnace. I'm sure someone here knows it off the top of their head. Thanks for the help.
    IRC


    G2427.10.8 (503.10.8) Slope. A vent connector shall be installed without dips or sags and shall slope upward toward the vent or chimney at least 1/4 inch per foot (21 mm/m).

    Exception: Vent connectors attached to a mechanical draft system installed in accordance with the appliance and draft system manufacturers’ instructions.

    Last edited by Mark Hagenlock; 02-02-2013 at 05:15 PM. Reason: clarification

  3. #3
    Join Date
    Jul 2008
    Location
    Chicago
    Posts
    261

    Default Re: Code for vent pipe slope

    IRC M1803.3 ...Connectors shall be as short and straight as
    possible and installed with a slope of not less than 1/4 inch (6 mm)
    rise per foot of run....

    Mike Lamb
    Inspection Connection, Inc.
    http://www.inspection2020.com/

  4. #4
    Join Date
    Jul 2009
    Location
    Spokane, WA
    Posts
    116

    Default Re: Code for vent pipe slope

    Thanks again


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