Wirsbo hePEX is heat-transfer tubing with an EVOH oxygen diffusion barrier. The oxygen diffusion barrier meets the requirements of the German DIN Standard 4726.
Wirsbo hePEX is compatible with both Wirsbo's ProPEX fitting connections and QS-style fittings.
Wirsbo hePEX is manufactured to ASTM F876 and F877, and is designed for closed-loop hydronic heating applications. Wirsbo hePEX tubing is rated and listed by the Hydrostatic Stress Board of PPI at: 200 degrees F at 80 psi, 180 degrees F at 100 psi and 73.4 degrees F at 160 psi.
These warnings are not an indication that these products are violating any safety standards or regulations.
However, as our products might be sold in the state of California, we are legally obliged to inform customers about the potential presence of these chemicals in our products.
