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  1. #1
    Join Date
    Apr 2019
    Location
    California
    Posts
    80

    Question To Pan or not to Pan

    Ok, so reviewing drain pan requirements for a water heater, and I am pretty sure I am reading this right.

    Per IRC / up tp and including the 2012 edition:
    P2801.5 Required pan. Where water heaters or hot water storage tanks are installed in locations where leakage ofthe tanks or connections will cause damage, the tank or water heater shall be installed in a galvanized steel panhaving a material thickness of not less than 0.0236 inch (0.6010 mm) (No. 24 gage), or other pans approved for suchuse.

    Then in 2015 it changed stating:
    P2801.6.1 Where a pan drain was not previously installed, a pan drain shall not be required for a replacement water heater installation.

    So my question, if a new water heater was installed by a DIY'er in 2001 who did not install a drain pan, does that mean when a new unit was installed in 2022, that a pan is not required as it was not previously installed ?

    My only suggestion would be to comment that a pan is not required but suggested !

    How do you handle this.

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  2. #2
    Join Date
    Mar 2007
    Location
    New Mexico
    Posts
    1,352

    Default Re: To Pan or not to Pan

    I'm old and jaded. My template has a sentence saying roughly that a pan should be used under the water heater. I leave that sentence in the report if it's applicable, which it normally is. I've never gotten any response from a seller or buyer about it. If a seller pushed back about it not being required, I would just respond that they should confirm that with the plumbing AHJ. I'm not about to argue with a seller whether a drain pan is a good idea or not.

    Jim Robinson
    New Mexico, USA

  3. #3
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    3,154

    Default Re: To Pan or not to Pan

    I don't know the IRC plumbing section Joe,

    Your location indicates California. If you are still here, then we use the California Plumbing Code, which uses the Uniform Plumbing Code as the model.

    Unfortunately, I do not have the current CPC, this is from the 2019 CPC. There is no confusion.


    507.5 Drainage Pan. Where a water heater is located in an attic, in or on an attic ceiling assembly, floor-ceiling assembly, or floor-subfloor assembly where damage results from a leaking water heater, a watertight pan of corrosion-resistant materials shall be installed beneath the water heater with not less than V* of an inch (20 mm) diameter drain to an approved location. Such pan shall be not less than VA inches (38 mm) in depth

    Department of Redundancy Department
    Supreme Emperor of Hyperbole
    http://www.FullCircleInspect.com/

  4. #4
    Join Date
    Oct 2014
    Location
    Maryland, DC, and Northern Virginia, electrical only
    Posts
    437

    Default Re: To Pan or not to Pan

    Quote Originally Posted by Gunnar Alquist View Post
    There is no confusion.

    507.5 Drainage Pan. Where . . .damage results from a leaking water heater, a watertight pan of corrosion-resistant materials shall be installed
    Oo, I hates such language. Does "where damage results" mean "where damage has resulted" or "where damage would result"?

    As for the IRC, in my obviously hot off the press 2012 edition, P2801.5 Required Pan, says ". . .in a location where leakage will cause damage. . ." and specifies size, material, drain, and end point of drain.


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