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Uponor Combi Pipes are made of cross-linked polyethylene and are part of Uponor’s Drinking Water, Local Heat Distributions and Underfloor Heating product groups. Uponor Combi Pipes are used for tap water and heating systems. Uponor Combi Pipe has an oxygen diffusion barrier of Ethyl Vinyl Alcohol extruded seamless on the outside of the pipe. Uponor Combi Pipe has very good long-term properties, is corrosion resistant and has a low roughness coefficient. The pipe also has the advantage of not being affected by high water speeds or aggressive water, not emitting taste, smell, heavy metals or harmful substances into drinking water. Uponor Combi Pipes are treated in accordance with the new hygienic requirement in the Positive Lists for Organic Materials, 4MS Common Approach.