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  1. #14
    Join Date
    Jun 2007
    Location
    Minneapolis, MN
    Posts
    750
    If there is no check valve in the main water, there is no need for an expansion tank. In Minnesota the code reads 18" for the terminal end of a WH T&P. Some codes state no more than 2' or less than 6".

  2. #15
    Join Date
    Aug 2004
    Location
    S.E. Pa
    Posts
    6,273
    I'm referencing the 2009 IRC, P2803.6.1 : " The discharge piping service a pressure relief valve, temperature relied valve or combination valve shall-
    item 10. Not terminate more than 6" above the floor or waste receptor".

    For boilers, M2992.4 Pressure relief valve. "...Discharge shall be piped to drains by gravity to within 18" of the floor or to an open receptor."

    Your local code may differ.

  3. #16
    Join Date
    Dec 2007
    Posts
    4,743
    I have seen and inspector required outside discharge of T&P.

    Mobile homes, in my area, must be piped outside the skirt so it can be seen.

    Some stick built homes are piped UP and OUT so they do not discharge in a finished basement.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

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