The Toto® T40 Aquia® IV 1-Piece Elongated Dual Flush 1.28 and 0.8 gph Universal Height WASHLET®+ and Auto Flush Ready 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. The 1-Piece design is not only aesthetically pleasing, but also offers the benefit of being easier to clean versus a 2-Piece toilet. By removing the gap between the tank and bowl, we eliminate the hiding place for dirt and debris. An additional benefit of the 1-Piece toilet is that there is no threat of leaks from bolts or gaskets that can occur in 2-Piece toilets. 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® technology, a layer of exceptionally smooth glaze that prevents particles from adhering to the ceramic. This feature, coupled with DYNAMAX Tornado Flush™, helps 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 gph rinse or 1.28 gph for tougher jobs. This version of the Aquia® IV offers Toto® T40 WASHLET®+ and Auto Flush 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 across a wide range of users. The Toto® Aquia® IV meets the standards for EPA WaterSense® and California's CEC and CAL Green requirements. The Aquia® IV comes ready for install into a 12 in rough-in, but may be adapted for a 10 in or 14 in rough-in with the purchase of a separately sold adapter. Does not include seat or WASHLET®. Additional items needed for installation and use must be purchased separately - compatible WASHLET® or seat, wax ring, toilet mounting bolts and water supply lines.