This standard specifies the requirements of pipes, fittings and the system of polypropylene (PP) for solid-wall piping systems in the field of soil and waste discharge (low and high temperature) (inside buildings (marked with " B" ) and (both inside buildings and buried in ground within the building structure (marked with " BD" ). NOTE 1: The application area " inside buildings" according to this standard, applies to the interior area of the building only. The application area " within the building structure" conforms to the requirements for " inside buildings" according to prEN 12056-1.