Premier's universal fill valve is the best choice for replacing your toilet's current ballcock fill valve. Premier's valve works with just about any one-piece or two-piece toilet. It adjusts from 9 to 13 inches in order to fit tanks of all different sizes. The construction of the valve is without peer. This valve is made from a sturdy plastic that repels corrosion. The plastic construction also allows the toilet to function very quietly. The valve features an anti-siphon design that prevents water contamination by preventing backflow of water. Be assured of its performance with our 5-year warranty. Order today, and have this valve installed just minutes from its arrival.