The skirted design conceals the trap way, 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 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 item is 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 helps to reduce the frequency of toilet cleanings, minimizing the use 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 1.28 GPF for tougher jobs. The toilets feature a channel on the bowl surface to help conceal your washlet supply line and power cord for seamless integration. Item meets the standards for EPA water sense, and California's CEC and CALgreen requirements. The Aquia IV comes ready for installation into a 12" rough-in. Includes a soft closed toilet seat. Additional items needed for installation and use must be purchased separately: wax ring, toilet mounting bolts, and water supply lines.