PexKIT tubing with oxygen barrier is used in underfloor heating systems, defined as Class 4, according to EN ISO 15875-1:2003. For this application, manifolds with Eurocone connection are available for pipes with diameters between 14 and 20 mm. Material: cross-linked polyethylene PE-X, silane cross-linking method PE-Xb. Oxygen barrier (EVOH ethylene-vinyl alcohol copolymer) – prevents oxygen from the atmosphere from penetrating through the pipe molecules and thus the oxidation of the metal components in the system. Reference standard: EN ISO 15875-2:2003 regarding production, testing, and scope of application. DIN 4726 for the oxygen barrier. Maximum pressure: PN 8 bar. The tubing is supplied as coils of various lengths in the following colors: natural, red, and blue. Structure: 3 layers: 1 PE-Xb pipe 2 Adhesive 3 Oxygen barrier