Watts 0794102 4" LDFRE 2Nd Check Valve Repair Kit 909

The Watts 0794102 4" LDFRE Second Check Valve Repair Kit will restore the correct operation of the check valve by replacing internal parts that control backflow prevention. It works by replacing seals, and moving components that permit one-way movement and prevent back-and-forth movement in the line. It is used in valve assemblies, and is often used in HVAC systems including water distribution and hydronic systems, to maintain further protection of piping networks. This operation aids in the integrity of the system, enhances the stability of flow, and provides effective backflow prevention during operation.