NEXT BY DANCO HydroClean Water-Saving Toilet Fill Valve Repair Kit with Cleaning Tube, Blue and Gray, 1-Pack (HC660) WATER-SAVING toilet fill valve with built-in mini-valve that adjusts tank refill water level DETECTS LEAKS: The water-saving toilet fill valve sounds an audible alert when a leak is detected making you aware of any potential issues that must be addressed CLEANING JETS: Strong jets stir up debris in toilet tank in order rush any dirt down the drain with every flush keeping your toilet tank cleaner EASY ADJUSTMENTS: Shuts off water inside tank making repairs a snap, refills quickly, and has an adjustable height of 11 inches to 13.8 inches EASY INSTALLATION: Smart Nut helps with easy installation without tools in most standard toiletes Detects leaks Cleans the tank Installs easily without tools Calibrates your toilet for full flush efficiency