The TOTO Aquia IV 1G Dual Flush 1.0 and 0.8 GPF Toilet Tank is designed for use with the Aquia IV dual flush bowl. The Aquia IV tank includes a tank to bowl gasket, tank to bowl hardware, and toilet bolt caps. The Aquia IV tank features TOTO's Dual-Max dual flush option, allowing you to proactively conserve water usage. The chrome center-mounted push button that sits atop the tank allows you to choose between a 0.8 GPF rinse or 1.0 GPF for tougher jobs. The Aquia IV tank meets the standards for EPA WaterSense®, and California’s CEC and CALGreen requirements. Additional items needed for installation and use must be purchased separately: toilet bowl, wax ring, toilet mounting bolts, water supply lines, and toilet seat. The Aquia IV tank can be used on Aquia IV bowls.