Designed to fix no/slow refilling, running, and noisy toilets, the Korky PRO GRADE toilet fill valve is quieter than other fill valves and is ideal for toilets (1.6 gpf or less)|It is fully adjustable to prevent water waste in all toilets|The refill adjuster delivers the right amount of water to the bowl to maintain original performance|This toilet fill valve is easy to install and adjust no tools are required|The innovative twist-lock adjustment makes installation easy|Designed to fit more toilets, the Korky toilet fill valve adjusts from 7-3/4 to 13-1/2 in|Fits Kohler, TOTO, Gerber, American Standard and all other brands|Engineered for strength, the shank and valve components perform as well as brass and are designed to perform better in high pressure homes and properties