For use in domestic hot/cold water supply systems and radiator heating systems. -Hot water supply: Class 1 design temperature based on service life: 60°C/49 years + 80°C/1 year + 95°C/100 hours. Class 2 design temperature based on service life: 70°C/49 years + 80°C/1 year + 95°C/100 hours. -High-temperature radiator heating: Class 5 design temperature based on service life: 80°C/10 years + 60°C/25 years + 20°C/14 years + 90°C/1 year + 100°C/100 hours. Reference Standard: – EN ISO 15875-2: 2003 – production, testing, scope – DIN 4726 – for oxygen barrier. Material: PE-X – crosslinked polyethylene. Crosslinking method: with peroxides – PE-Xa. The oxygen barrier (EVOH) (ethylene-vinyl alcohol copolymer) prevents the ingress of atmospheric oxygen and, consequently, the oxidation of metallic components within the system. Pressure Rating: 10 bar. Color: Silver. Construction: 3 layers – 1 – PE-Xa. 2 – Adhesive. 3 – EVOH Oxygen Barrier.