Como-pex pipes meet and exceed the specifications set by European Standards: the internationally accepted German DIN, Spanish UNE and British BS standards. As a result Como-pex does not present so much as a single failure in the regular biannual tests carried out by official institutes on random samples from production and the warehouse. The outcome of all the above is that Como-pex has been certified as a final product by the following organizations.

• ISO 9001 by TUV Germany for compliance with all international specifications pertaining to Como-pex.

• SKZ Germany and AENOR Spain for the mechanical strength of the pipe. Checking of pipe dimensions, measuring degree of cross-linking, microscopic homogeneity check, testing under pressure at various temperatures and checking linear expansion.

• MPA-NRW Germany for oxygen impenetrability to Como-pex Oxygen Barrier pipes. This regards a measurement that should comply with DIN 4726.

• WRAS-NSF Great Britain for suitability of Como-pex pipes for drinking water. Tests carried out at 20°C and 85°C on taste, odour, development of microorganisms, extraction of substances and metals dangerous for public health (cadmium, arsenic etc.)

The pipes are also checked by ELOT (Hellenic Organisation for Standardisation) under pressure at 110°C in long-term tests and by the State General Laboratory for suitability for drinking water.