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  1. #1
    Join Date
    Nov 2011
    Posts
    5

    Default Sump pump pipe sweating/condensation

    I recently insulated the rim joists in the basement which has made the temperature much more mild. Now that the Wisconsin winter has arrived, the pipe from the sump pump that travels outside is sweating so much that condensation is forming and dripping water onto the floor. There is also frost where the pipe is inserted through the header into the outside (the gap around the pipe through the header has been filled with spray foam).

    My question is...will installing tubular pipe foam insulation stop the pipe from sweating or will the water just accumulate inside?

  2. #2
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,510

    Default Re: Sump pump pipe sweating/condensation

    Use the really fat, closed cell black pipe insulation. Its the same as we use for our air conditioner lines in the south.

  3. #3
    Join Date
    Nov 2011
    Posts
    5

    Default Re: Sump pump pipe sweating/condensation

    I'll give that a try. Thank you

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