Danco HydroClean Universal Fill Valve is a water-saving device specifically designed for toilets. It regulates the amount of water sent to the bowl during the tank refilling process, resulting in efficient water conservation. This innovative fill valve features a calibration function that adjusts and controls the water flow, ensuring only the necessary amount of water is used each time. By optimizing water flow, it helps reduce water consumption significantly. Additionally, the valve can detect leaks in the toilet tank and notify the user promptly, allowing for timely repairs to prevent water waste and potential damage. Installing the Danco HydroClean Universal Fill Valve is an effective way to actively contribute to water conservation by managing water flow and addressing leaks early. Model Number: HC630