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O2 barrier PEX or not?

I have some existing pipe in my basement and garage slabs.  The tubing is was installed around 2000-2001 and was part of an open-loop staple-up radiant 'kit' that was purchased, but not installed.  I am trying to determine if this is O2 barrier tubing or not.  I have read that 'shiny' pipe is usually O2 barrier PEX.  this tubing has a glossy type finish, but the markings on the tubing are as follows:

ASTM F876/877

CSA 137.5-NES


I compared it to the Non-barrier Vanguard Vanex tubing in my potable water system and it is slightly more shiny.



  • furthur
    furthur Member Posts: 25
    my first guess is not...

    Unless it says somewhere DIN 4726, or EVOH...

    ASTM F876/877 and CSA 137.5 are both potable water specs for pex.  I don't know what pp101 signifies.

    There was an error rendering this rich post.

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