Description Toto Willingham Toilet Flush Valve Assembly, 3.2-Inch, for One-Piece Toilets with Buoy Toto Toilet Willingham  3.2-inch flush valve assembly Glacier Bay Designed for one-piece toilets with an inch flush hole. Measure your Flush hole in your Toilet before ordering any Flush Valve. Fits Glacier Bay One Piece Toilet Flush valves fit inside a 3.25-inch Flush Hole Overflow tube measures 10 inch tall. Make sure to keep the overflow tube 1/2 inch below the Handle Hole. Extra Tall 10-inch Overflow tube, Overflow tubes are easy to cut with a hacksaw Blade.