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A flow switch is an essential component in many heating systems, used to detect the movement of liquid or gas within a pipe. In boiler and burner applications, this device ensures that the system only operates when there is adequate flow, preventing damage from dry firing or overheating. Whether you are replacing a faulty unit or upgrading your existing setup, a reliable flow switch helps maintain safe and efficient operation of your heating equipment. This part is commonly found in hydronic heating systems, boilers, and other fluid-based heating appliances.