This Technical Specification gives guidance for the assessment of conformity included in the manufacturer's quality plan as part of his/her quality system. This Technical Specification includes: a) provisions for materials, components, joints and assemblies given in the applicable part(s) of ISO 15877; b) provisions for the manufacturer's quality system, which can conform to ISO 9001[2]; c) definitions and procedures applied if certification is involved; in which case, the certification body can be accredited to ISO/IEC Guide 65[5] or ISO/IEC 17021[3], as applicable. In conjunction with the other parts of ISO 15877, this Technical Specification is applicable to chlorinated poly(vinyl chloride) (PVC-C) 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), under design pressures and temperatures appropriate to the class of application (see Table 1 of ISO 15877-1:2009).