What is the difference between Oxygen Barrier PEX and Non-Barrier PEX?
Oxygen Barrier PEX, often abbreviated as O2B or referred to as O2 Barrier, has a coating applied to the outside to prevent oxygen (O2) from entering the system (The O2 molecules are smaller than those of PE.)
Oxygen Barrier PEX is used when installing in a closed or pressurized system. It is NOT necessary with an 'open" type system.
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