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White Pex Tubing changed Color to Gray?

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by Franzen105, Dec 11, 2012.

  1. Franzen105

    Franzen105 New Member

    Joined:
    Oct 22, 2011
    Messages:
    26
    Loc:
    Amery WI
    Does anyone know why my pex tubing going into the floor would change colors. Just a little nervous.. The system is 14 years old.
    Thanks

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  2. BoilerMan

    BoilerMan Minister of Fire

    Joined:
    Apr 16, 2012
    Messages:
    1,604
    Loc:
    Northern Maine
    It's just the "dead" water in a closed loop system. The water gets depleated of oxygen and just turns a blackish stinky color. This will show through pex, it's nothing to be alarmed about. If it were rusty-brown then that's really bad, but blackish grey is absolutly normal.

    TS

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