Premium toilet fill valve sets the standard for not only performance, but also installation. Best for use in 1.28 and 1.6 GPF (Gallons per Flush) toilets (can use with older 3.5 GPF models). The universal design is built to adjust and work with most toilets and brands. Fix noisy, or slow filling fill valves with the quietest, most powerful toilet fill valve. Tank and bowl water level adjustment dials to customize the perfect flush. EZ-Twist height adjusts from 9 in. to 14 in. to fit more tanks. Features new and improved step-by-step pamphlet style instructions, and a pre-installed shank washer for the fastest and simplest install possible. The PerforMAX fill valve is a code approved, anti-siphon design that won't contaminate the fresh water supply. Includes fill valve, washer, locknut, tube and clip for everything needed to replace the toilet fill valve. 7 year warranty.