Double flexible, pre-insulated, self-compensating, underground pipe. ­Especially suitable for hot and cold potable water, but also for waste­water and other fluids. Corrosion-resistant transport pipe in cross-linked PE-Xa in accordance with EN ISO 15875. Thermal, elastic, CFC-free foam insulation made from cross-linked PE-X with closed microcellular structure. ­Minimal ­water absorption capacity of < 1% in accordance with ISO 2896. ­Insulating PE centrepiece guarantees an effective separation of sanitary hot water pipe and pipe for circulation loop. Corrugated outside casing in HDPE, made in accordance with the closed chamber principle to provide high-grade protection to the piping system. 1x32/4.4, 1x28/4.0, 23-20, 160, 2,6, 0,6.