PPRC Coupling / Switch 40x32 methak - 52 mm from 40 mm to 32 mm diameter PPRC pipes are high quality polypropylene fitt used to create a link between different pipes. This transition does not leak two different sizes in heating systems, drinking water lines and industrial pipeline projects and ensures continuous combination. Polypropylene Random Copolymer (PPRC) is produced from the material and is distinguished by high blood pressure, temperature and chemicals. This product, which the metak brand, provides longevity and reliable transitions in the system.