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Dura Pex tubing

kristin Member Posts: 1
Has anyone had any issues with a black oily sludge in this tubing used for radiant heating?   The information on the tubing is as follows:  Dura Pex CSA B, 137 5-97,   7/12/07-2 ,   FT 04 - 250 - 4 - 07.


  • EricAune
    EricAune Member Posts: 432
    No oxygen barrier

    This tubing does not have an oxygen barrier.  Usually with non-barrier tubing a flat plate heat exchanger is used to isolate the tubing from the heat source and any ferrous components such as pumps & tanks.  A stainless steel or bronze pump would then be used on the tubing side of the heat exchanger.

    This "oily sludge" can cause some problems with the heating equipment and also reduce the overall efficiency of the system.

    Even with this type of piping arrangement, an additive should be used that will condition the water against rapid oxidation.  
    "If you don't like change, your going to like irrelevance even less"
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