Plastics piping systems for non-pressure underground drainage and sewerage - Polypropylene with mineral modifier(s) (PP-MD) - Part 3: Guidance for installation
This Technical Specification, together with ENV 1046 and EN 1610, provides a material-specific set of
guidelines for the installation of piping systems made of polypropylene with mineral modifier(s) (PP-MD) in the
field of non-pressure underground drainage and sewerage.
— outside the building structure (application area code "U");
— both buried in ground within the building structure (application area code "D") and outside the building.
This is reflected in the marking of products by "U" and "UD".