Certificates Certificate Kiwa TG0344 Tappvattenrör PE-Xa (Swedish) Certificate Kiwa TG0318 Universalrör PE-Xa (Swedish) Certificate Kiwa TG0318 Universal pipe PE-Xa (English) Certificate DinCertco 3V206 PE-Xa (English) Certificate SKZ A 341 PE-Xa (English) Certificate SKZ A 618 PE-RT (English) Certificate KTW LK Flex (English) Certificate W270 LK Flex (English)