PexKIT piping with an oxygen barrier is utilized in underfloor heating systems, defined as Class 4, in accordance with standard EN ISO 22391-2:2009. For this application, manifolds with Eurocone fittings are available for pipes with diameters ranging from 14 to 20 mm. Material: high-temperature resistant polyethylene PE-RT TYPE II. Oxygen barrier (EVOH ethylene-vinyl alcohol copolymer) – prevents oxygen from the atmosphere from penetrating through the pipe molecules and, consequently, the oxidation of metallic components within the system. Reference standard: EN ISO 22391-2:2009 regarding production, verification, and scope of application. DIN 4726 for oxygen barrier. Maximum pressure: PN8 bar. The piping is supplied in coils of various lengths in the following colors: natural, green, and red. Structure: 3 layers: 1. PE-Xb pipe 2. Adhesive 3. Oxygen barrier