NEXT BY DANCO Universal Water-Saving Dual Flush Valve with Push Button, Chrome, 1-Pack (HYR270) SAVE WATER and MONEY: Easily converts a standard toilet into a 2-button, dual flush toilet that saves water and eliminates common leaky toilet problems due to a worn out flapper, handle, or faulty flapper chain. Uses up to 70% less water for liquids and paper EASY NO-TOOLS REQUIRED INSTALLATION: Installs without tools in 5 to 10 minutes - toilet tank removal not required. UNIVERSAL FIT: Works with all standard-flush valves and requires 10-inch minimum clearance from highest point of the flush valve opening to the inside of the tank lid. SMART TECH: Detects leaks and signals when a leak is found. Jets clean toilet tank and parts with every flush. LightTouch button DURABLE: Permafit silicone seal is chemical resistant and will not warp.