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WHY 5 LAYERS?
Because only the best will do for your underfloor heating project. That's why there is no point in putting an EVOH oxygen barrier layer on the outside of a pipe where it is susceptible to Physical, Chemical & UV damage not allowing it to act effectively as an oxygen barrier at all. EVOH is a fabulous oxygen permeation barrier but is a delicate material which needs to be protected within the pipe wall to maintain its integrity for the life of the heating system. With PEX you can be confident that the oxygen barrier will protect your heating system from corrosion.
Mechanical properties at 73°C
Tensile strength (at break) 20 Mpa at 50 mm/min
Elongation of break (minimum) 150%
Impact strength (notched Izod) 900 J/m notch
Coefficient of linear expansion (73°C) 0.85 x 10-4/°F
Coefficient of linear expansion(180°C) 1.6 x 10-4/°F
Brittleness temperature Below 0°F




