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PVC for condensate in plenum spaces

Discussion in 'Mechanical Codes' started by jar546, Oct 11, 2019.

  1. jar546

    jar546 *****istrator

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    In other than one and two-family dwellings, does anyone allow PVC to be used as condensate disposal when the HVAC equipment is part of a plenum space and the return ducts are not directly connected to the air handler?
     
  2. mtlogcabin

    mtlogcabin Sawhorse

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    In a mechanical room then yes. Other areas most likely not. I think you need to be more specific in your description of the plenum space. Type of construction may allow it also but I don’t have a code book at home.
     
  3. steveray

    steveray Sawhorse

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    Nope....Better get a plenum rated condensate pump too...
     
  4. mtlogcabin

    mtlogcabin Sawhorse

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    There are exceptions for Plastic pipe in a plenum if they meet a certain listing.

    2018 IMC
    602.2.1.5 Discrete plumbing and mechanical products in plenums.
    Where discrete plumbing and mechanical products and appurtenances are located in a plenum and have exposed combustible material, they shall be listed and labeled for such use in accordance with UL 2043.
    602.2.1.7 Plastic plumbing piping and tubing.
    Plastic piping and tubing used in plumbing systems shall be listed and labeled as having a flame spread index not greater than 25 and a smoke-developed index not greater than 50 when tested in accordance with ASTM E84 or UL 723.
    Exception: Plastic water distribution piping and tubing listed and labeled in accordance with UL 2846 as having a peak optical density not greater than 0.50, an average optical density not greater than 0.15, and a flame spread distance not greater than 5 feet (1524 mm), and installed in accordance with its listing.
     
  5. Sifu

    Sifu Gold Member

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    No.
    602.2.1.5 Discrete plumbing and mechanical products in plenums. Where discrete plumbing and
    mechanical products and appurtenances are located in a plenum and have exposed combustible
    material, they shall be listed and labeled for such use in accordance UL 2043.
     

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