This document gives requirements and guidance for the assessment of conformity of compounds, products, and assemblies in accordance with the applicable part(s) of ISO 15876 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 In order to help the reader, a basic test matrix is given in Annex A. In conjunction with the other parts of ISO 15876 (see Foreword), this document is applicable to polybutene (PB) piping systems intended to be used for hot and cold water installations within buildings for the conveyance of water, whether or not intended for human consumption (domestic systems) and for heating systems, under design pressures and temperatures appropriate to the class of application (see ISO 15876-1:2017, Table 1).