The Danco toilet repair kit solves the two biggest sources of water loss in toilets-miscalibration and leaks. The mini-valve allows pinpoint calibration which saves water. The automatic leak detection feature continuously monitors toilet sustainability and signals when a leak occurs. It also cleans the tank and flapper with powerful jets that prolong the life of all internal components and eliminate the need for harsh, toxic chemicals that are a source of contamination in and around your home. Next by Danco exemplifies a line of state-of-the-art plumbing repair parts that empowers the DIYer and Professional to do more than just solve the problem. Dont just repair it. Improve it. Cleans the tank and flapper with powerful jets Flapper designed for harsh water conditions Designed to be compatible with Kohler, American Standard and Briggs Durable plastic construction Installs easily without tools