The Fluidmaster Dual Flush Valve is designed to be an exact replacement dual flush valve for your 3 in. Flush Valve Toilet. Dual flush offers maximum performance to optimize water use. Customize to your specific needs, with fully adjustable settings for both solids and liquids to enhance performance and save water. Clear and easy to follow instructions are included for a simple, quick install process. Built to last from high quality materials this model features a 5 year warranty. Also consider a Fluidmaster Toilet Fill Valve for complete fill and flush restoration. Designed to save water Fluidmaster's 3 in. Dual Flush Valve Replacement helps you eliminate common flush problems like leaks and running toilets. For use in Dual Flush Valve Toilets only.