PPRC Coupling / Switch 40x20 methak - 40 mm from 40 mm to 20 mm Diameter PPRC pipes are a high-strength transition fittation, designed to compensate. This product is used in water supply, heating systems and technical batula areas that require combination of different diameters. Polypropylene Random Copolymer (PPRC) produced from the material, it is resistant to high pressure and temperature changes, corrosion and is completely safe for use with drinking water. This clutch / transition, which is a quality production of metak brand, allows you to create a longevity, reliable system.