Coude + clapet anti-retour DN20 De Dietrich 86665772

The elbow + non-return valve DN20 is a dual-purpose fitting that provides both a 90-degree pipe turn and backflow prevention. With a DN20 connection size, it is designed for medium-diameter pipework in heating and plumbing systems. This component is particularly useful in boiler and burner installations where space is limited and reliable flow direction is essential. The integrated check valve ensures that water or gas flows only in the intended direction, safeguarding the system from potential issues caused by reverse flow.