Coude + clapet anti-retour dn15 De Dietrich 86665771

The elbow + non-return valve dn15 combines a directional fitting with a check valve in a compact unit. This component is used in heating and water systems to change pipe direction while preventing backflow. The DN15 size makes it suitable for smaller diameter pipework, commonly found in domestic boiler installations. It simplifies installation by reducing the number of separate fittings needed, and the integrated non-return valve helps protect the system from reverse flow, which can cause damage or inefficiency.