RDZ Tech pipe Ø 17-13 made of high-density cross-linked polyethylene with the oxygen barrier between the PE-X layer and an outer layer made of PE, which ensures further protection during installation in the building site. The layers are combined thanks to a special glue. This pipe is produced according to DIN 16892 and DIN 4726 concerning oxygen permeability. This solution offers even and stable cross-links and constant characteristics over time.