The Fluidmaster 400ACN3P5 Universal Toilet Fill Valve 3-Pack includes 3 of the #1 selling toilet fill valve in the world. Made to fix leaking, noisy and slow filling toilet valves. Now featuring an enlarged and easier to turn aater level adjustment dial. Instructions included for quick and easy installation. A universal design that fits most tanks, with EZ-twist height adjustment from 9" to 14". The anti-siphon design eliminates fresh water supply contamination, is code approved, and efficiently uses water. The 400A fill valve is trusted and durable, built from corrosion resistant materials and with a 5 year warranty. The Fluidmaster 400A Toilet Fill Valve 3-Pack is the top choice for an effective and quick solution to common toilet problems. Easy to install. 1 year warranty.