The Korky 2X Long Life Toilet Fill Valve is the longest lasting, most universal fill valve available. Designed to fix no fill, slow refilling, running, and noisy toilets, the Korky 2X Toilet Fill Valve is quieter than other fill valves and is for toilets since 1994 (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. Simply remove the old fill valve or ballcock, insert the new Korky fill valve, and adjust.