Unlike conventional siphon jet flushing systems, DYNAMAX TORNADO FLUSH sends 100% of the water through the rim so all of it is used to clean the bowl and to evacuate waste. DYNAMAX makes it possible to evacuate and clean with a single flush despite using a lower volume of water Bowl design reduces water flow resistance and turbulence, resulting in a quieter flush Dual flush 1.0 or 0.8 GPF toilet models reduce water usage by 45% on average over standard 1.6 GPF toilets. That is approximately 11.5 gallons of saved water a day and 4,250 gallons or more per year! Better for the planet and better for your wallet, dual flush toilets help make conservation easy. *The average American flushes five times a day at home. Assuming an average household of 3.2 people over 365 days. CEFIONTECT ceramic glaze creates an extraordinarily smooth surface that helps keep the bowl cleaner longer. The ion-barrier keeps everything cleaner, longer resulting in fewer chemicals in the environment and less water used for cleaning. Advanced technologies including CEFIONTECT glaze eliminates the microscopic gaps where waste hides to provide the ultimate in comfort and hygiene. The TOTO Aquia IV 1G Two-Piece Elongated Dual Flush 1.0 and 0.8 GPF Toilet with CEFIONTECT is the epitome of modern form and function. The skirted design conceals the trapway, which enhances the elegant look of the toilet and adds an additional level of sophistication. Skirted design toilets also minimize the need to reach behind the bowl to clean the nooks and crannies of the exterior trapway. The Aquia IV features TOTO’s DYNAMAX TORNADO FLUSH, utilizing a 360 degree cleaning power to reach every part of the bowl. This version of the Aquia IV includes CEFIONTECT, a layer of exceptionally smooth glaze that prevents particles from adhering to the ceramic. This feature, coupled with DYNAMAX TORNADO FLUSH, assists to reduce the frequency of toilet cleanings, minimizing the usage of water, harsh chemicals, and time required for cleaning. The enhanced design of the Aquia IV inner bowl reduces water flow resistance and turbulence, resulting in a quieter flush. The chrome center-mounted push button that sits atop the tank allows you to proactively conserve water by choosing between a 0.8 GPF rinse or 1.0 GPF for tougher jobs. The Universal Height design allows for a more comfortable seat position across a wide range of users. The TOTO Aquia IV meets the standards for EPA WaterSense, and California’s CEC and CALGreen requirements. The Aquia IV comes ready for install into a 12" rough-in, but may be adapted for a 10" or 14" rough-in with the purchase of a separately sold adapter. The Aquia IV bowl and tank set includes tank to bowl hardware, a tank to bowl gasket, outlet socket, and toilet bolt caps. Additional items needed for installation and use must be purchased separately: seat, wax ring, toilet mounting bolts, and water supply lines.