Description Glacier Bay High-Efficiency Toilet Fill Valve System American Standard Cadet Series Toilets Two Piece Models – #2108, 2109 (non-pressure assist), 2120, 2122, 2124 / Tanks #4078 & 4083 Adjustable water height fill valve Adjustable from 9-13 inches tall to fit short and tall tanks Fill valves are designed to fill the toilet tank with water from the water supply line after it has been emptied by a flush This fill valve is a universal fit for 1 piece and 2 piece toilets that are bottom water fed with a 7/8-inch pipe connection The fill valve replaces the ballcock mechanism and is more efficient and easy to install Fixes: running, noisy, slow refill, and weak flushing toilets Universal Toilet Fill Valve for American Standard, Eljer Kohler and Mansfield, Toilets How to Install a Universal Fit Tower Fill Valve in Your Toilet