Description Replacement Flush Valve for American Standard Cadet Toilets Two Piece Models – #2108, 2109 (non-pressure assist), 2120, 2122, 2124 / Tanks #4078 & 4083 Includes Nylon Bolts, Nuts, Tank Gasket and Soft Rubber Flapper 2.3 inch threaded flush valve flapper valve assembly Flapper valve stays open longer to maximize flush 9 inch tall overflow tube so you can cut 1/2 inch below handle hole.   The more water you can put into your toilet the better it will flush Flapper valve has separate silicone ring for a super seat Flush Valve Easy Measuring Tips – Video One piece or Two piece which is right for you? Video