Details: The Fluidmaster 400AH PerforMAX Toilet Fill Valve sets the high performance standard. Designed to replace old and leaky fill valves the PerforMAX fill valve is the most powerful toilet fill valve on the market (*Also known as the 400ARHR). With quick and easy installation this fill valve design eliminates noise, while generating 2X greater refill rates than standard fill valve designs. A universal toilet repair part that fits most toilet models, with a height adjustable valve shank design. Best with 1.28 HET and 1.6 GPF toilets, including dual flush and can use with pre-1994 3.5 GPF. The water-saving roller clamp helps save water and money by optimizing your toilets water usage. Built to last this replacement toilet fill valve features quality construction with a 7 year warranty. Combine with a Fluidmaster toilet flapper, or flush valve for complete fill and flush optimization. PerforMAX the top solution for enhancing your toilets power, and eliminating noise.