UNE Standards of reference:
UNE EN ISO 21003. Multilayer piping systems for hot and cold water installations inside buildings
UNE EN ISO 15875. Plastic pipes for hot and cold water installations. Crosslinked polyethylene (PE-X)
UNE EN ISO 22391. Plastic pipes for hot and cold water installations. Polyethylene of raised temperature resistance (PE-RT)
UNE EN 1264. Underfloor heating. Systems and components
UNE 53008. Multilayer pipe systems for gas installations with a maximum operating pressure up to and including 5 bar.
UNE ENV 12108. Plastic piping systems. Recommended practices for the installation of piping systems for pressurised hot and cold water for human consumption inside buildings.
UNE EN 806. Specifications for pipes for water for human consumption inside buildings
UNE 60670. Gas installations pipework supplied at maximum operating pressure (MOP) up to and including 5 bar.