This document gives guidance for the assessment of conformity of materials, products, joints and assemblies in accordance with the applicable part(s) of EN 1852 intended to be included in the manufacturer s quality plan as part of the quality management system and for the establishment of certification procedures. NOTE 1 The quality management system is expected to conform to or be no less stringent than the relevant requirements in EN ISO 9001 [1]. NOTE 2 If third-party certification is involved, the certification body is expected be accredited to EN ISO/IEC 17065 [2] or EN ISO/IEC 17021 (all parts) [3], as applicable. NOTE 3 In order to help the reader, a basic test matrix is given in Annex A. In conjunction with EN 1852-1 this document is applicable to solid wall piping systems made of polypropylene (PP) intended to be used for: non-pressure underground drainage and sewerage outside the building structure (application area code U ), and non-pressure underground drainage and sewerage for both buried in ground within the building structure (application area code D ) and outside the building structure. This is reflected in the marking of products by U and UD .