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PerforMAX® the top solution for enhancing your toilets power, and eliminating noise. Featuring ultra-quiet function and adjustable flush. Designed to replace old and leaky fill valves the PerforMAX® fill valve is the most powerful toilet fill valve on the market. A universal toilet repair part that fits most toilet models, with a height adjustable valve shank design, combined with fast and simple installation. Best with 1.28 HET and 1.6 GPF toilets, including dual flush, but can use with pre-1994 3.5 GPF. The water-saving roller clamp helps save water and money by customizing your toilets water usage. The 400AH replacement toilet fill valve features a 7 year warranty and quality construction that’s built to last. A quiet and powerful solution that eliminates noise, while generating 2X greater refill rates than standard fill valve designs. The Fluidmaster 400AH PerforMAX® Toilet Fill Valve sets the high performance standard.