Description American Standard 3-Inch Dual Top Button Flush Valve | One-Piece Toilet Replacement Key Features: Universal Fit: Works with all top-button, 3-inch, one-piece toilets. American Standard Replacement: Ideal for replacing American Standard dual flush valves and compatible with many other brands. Adjustable Height: Adjustable overflow tube from 6-10 inches to get the perfect height. Durable Construction: Built for long-lasting reliability. Extra Seals: Extra flush valve seals provided by NuFlush. Easy Installation: Simple setup for quick repairs or upgrades.