The Plumber's Choice 1 in. x 300 ft. Blue PEX-B Tubing Potable Water Pipe

Oxygen barrier (EVOH) is a strong and flexible cross-linked polyethylene tubing with superior temperature and pressure ratings. Useful in commercial and residential hydronic radiant heating applications. With the same properties as PEX non-barrier pipes. EVOH PEX barrier pipe keeps oxygen and other elements from infiltrating and corrupting the key mechanical components in heating systems.