MDPE 90 Elbow Pipe Compression Coupling Suitable for medium density polyethylene (MDPE) pipe. Both ends are the same size, to join two 32mm pipes. Impact-resistant nut and body. This design copes well with high levels of thermal and mechanical stress - ideal for use in underground cold water systems. PN16 Rating. Pressure Rating: 16 bar. Safety Factor: 3. Operating Temperature: 20°C @ 16 bar, 45°C @ 10.8 bar, 70°C @ 3.4bar. Standards: UNI 9561-9562, UNI EN 712-713-715, UNI ISO 7/1, ISO 14236, UNI 2233. 5 Pack.