PPR-100 PIPES & FITTINGS SDR-9 (DIN 8077/8078) PN-16 Core products are manufactured from food grade 100% virgin material imported from approved sources in the world. International certification WRAS (Water regulation advisory scheme-UK) ensures that Core PPR products do not Impart odour, appearance or flavour to the water. They do not leach harmful substance into water and prevent microbial growth. WRAS CERTIFIED: WATER REGULATIONS ADVISORY SCHEME-UK