This Part of EN 12201 gives guidance for the assessment of conformity to be included in the manufacturer’s quality plan as part of his quality system. This Technical Specification includes: a) requirements for materials, components, joints and assemblies given in Parts 1 to 5 of EN 12201; b) requirements for the manufacturer's quality system; NOTE 1 It is recommended that the quality system conforms to EN ISO 9001:2000 [1] c) definitions and procedures to be applied if third party certification is involved. NOTE 2 If third party certification is involved, it is recommended that the certification body is accredited to EN 45011 [2] or EN 45012 [3] , as applicable. In conjunction with one or more Parts of EN 12201 (see Foreword) it is applicable to polyethylene (PE) piping systems intended to be used for water supply intended for human consumption including the conveyance of raw water prior to treatment.