The Danco HYR460 combines two products, the HYR270 and HC630, that will increase your standard toilet's efficiency, save water and money. This kit solves most common toilet issues including leaky flappers, tangled chains, and handles that must be jiggled to be used. The dual flush turns your standard toilet into a water saving toilet. One button is the Quick Flush setting that uses significantly lower water volumes for liquids and paper - the setting needed 4 out of 5 time. The second Full Flush button uses the normal amount of water for solids. The Blue HYR460 can be installed without tools or remove the tank. The Total Repair Kit can be calibrated to adjust the exact amount of water needed going to the bowl, detects leaks, and jets clean the tank. Fits 2 in. standard flush valves. DANCO WATER-SAVING DUAL FLUSH TOILET REPAIR KIT: Converts a standard toilet into a dual flush toilet that saves water by reducing the amount of water used with each flush ONLY FITS TOILETS with 2 IN. FLUSH VALVES TOILET TANK HEIGHT REQUIREMENT FOR FIT: Toilet Tank requires a 10-inch minimum clearance from highest point of the flush valve opening to the inside of the tank lid. DOES NOT FIT: Not compatible with 1.28 GPF water-saving toilets, toilets with 3″ flush valves, and DOES NOT FIT MANSFIELD BRAND toilets DUAL-FLUSH SPLIT HANDLE ROUND DESIGN: The short center button is the Quick Flush setting that uses significantly lower water volumes for liquids and paper; the second complete push button at end is the Full Flush that uses the normal amount of water for solids ELIMINATES TOILET LEAKS: Eliminates common leaky toilet problems due to a worn-out flapper, handle or faulty flapper chain