O2 barrier PEX or not?

mtman5821

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

PP101-UPC HOT/COLD POTABLE WATER

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

Thanks!

furthur

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.