PPRC Coupling / Transition is 40x25 methak - 40 mm from 40 mm to 25 mm diameter PPRC pipes are high quality connective fitting designed for use in water and heating systems. This product is an ideal choice for combining various diameter pipes in a safe and leaking way. Polypropylene Random Copolymer (PPRC) transition from material is resistant to high temperature, pressure and chemical effects. This transitional fitting of the metak brand is easily assembled by the welding method and creates a long-term, solid system. Drinking water networks are widely used in heating systems and industrial applications.