PE-X x PE-X Elbow Coupling Heating MJ90. Elbow coupling for use in piping systems equipped with transport pipes for heating, cold or cooling water applications. The coupling has a long supporting pipe for optimal clamping, a conical outside thread connection and a clamping ring with stainless steel bolt. The included remote plate makes it easier to fit the coupling. The use of an elbow insulation kit with shrink caps or EPDM-end caps is recommended for underground connections. • Max operating pressure: 6 bar (16 bar) • Max fluid temperature: +95°C (+25°C) • PEX-a and PE pipes: SDR 11 • Supporting pipe material: CW602N • Clamping ring material: CW602N 75/6.8, 2 x 2 1/2", 75 x 75.