The Fluidmaster 400ARHR PerforMAX Toilet Fill Valve is the most powerful toilet fill valve in the market. Offering the quietest solution to fix and upgrade your toilet fill performance. Showcasing a water-saving roller clamp to regulate water levels in the bowl. Quick and easy to install, the 400ARHR features and universal fit, to work with all toilets including Kohler, Toto and American Standard and EZ-twist adjustable height from 10 inch to 15 inch to fit more tanks. With efficient and ultra-quite fill the PerforMAX Fill Valve replaces other inefficient, or outdated fill valve designs. Help prevent excessive or inadequate bowl fill levels with this high performance design. Get 2X greater bowl refill rates than standard models. Code approved, anti-siphon design, that won't contaminate the fresh water supply. Works with all toilets, including Kohler, Toto, and American Standard. Best for high efficiency toilets (HET) 1.28 & 1.6 GPF, but also works with 3.5 GPF designs. Fluidmaster's PerforMAX High Performance Toilet Fill Valve offers top performance, in a durable design, with a 7 year warranty.