The Aquia® Dual-Flush Elongated One-Piece Toilet with Tornado Flush (Seat Included) with CEFIONTECT® is a modern form and function. The skirted design conceals the tramway, which enhances the elegant look of the toilet and adds an additional level of sophistication. The one-piece design is not only aesthetically pleasing but also offers the benefit of being easier to clean versus a two-piece toilet. By removing the gap between the tank and the bowl, we eliminate the hiding place for dirt and debris. An additional benefit of the one-piece toilet is that there is no threat of leaks from bolts or gaskets that can occur in two-piece toilets. The Aquia® IV features TOTO's Dynamax Tornado Flush®, utilizing 360-degree cleaning power to reach every part of the bowl. This version of the Aquia® IV includes CEFIONTECT® technology, a layer of ceramic glaze that minimizes waste from sticking to ceramic surfaces. This feature, coupled with Dynamax Tornado Flush®, helps reduce the frequency of toilet cleanings, minimizing water usage, 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 0.9 GPF rinse or 1.28 GPF for more demanding jobs. This version of the Aquia® IV offers TOTO T40 Washlet®+ compatibility for when you are ready to upgrade. Washlet®+ toilets feature a channel on the bowl surface to help conceal your Washlet®+ supply line and power cord for seamless integration. The universal height design allows for a more comfortable seat position for many users. The TOTO Aquia® IV meets the standards for EPA WaterSense and California's CEC and CALGreen requirements. The Aquia® IV comes ready for installation into a 12" rough-in but may be adapted for a 10" or 14" rough-in with the purchase of a separately sold adapter. Includes a soft-close toilet seat (#SS124). Additional items needed for installation and use must be purchased separately: wax ring, toilet mounting bolts, and water supply lines.