PexKIT tubing with oxygen barrier is used in underfloor heating systems, defined as Class 4, according to EN ISO 15875-1:2003 standard. For this application, manifolds with eurocon mounting are available for pipes with diameters between 14-20 mm. Material: cross-linked polyethylene PE-X, silane cross-linking method PE-Xb. Oxygen barrier (EVOH ethylene-vinyl alcohol copolymer) – prevents oxygen penetration from the atmosphere through the pipe molecules and thus oxidation of metal components in the system. Reference standard: EN ISO 15875-2:2003 regarding production, testing and application scope. DIN 4726 for oxygen barrier. Maximum pressure: PN10 bar. Tubing is supplied in coils of various lengths in the following colors: natural, red and blue. Structure: 3 layers 1 PE-Xb pipe 2 Adhesive 3 Oxygen barrier