The TOTO T40 Aquia IV WASHLET+ elongated skirted toilet Bowl is designed for use with the Aquia IV tank. When paired with its tank, the Aquia IV features TOTO’s DYNAMAX™ TORNADO FLUSH®, utilizing a 360 degree cleaning power to reach every part of the bowl. The enhanced design of the Aquia IV inner bowl reduces water flow resistance and turbulence, resulting in a quieter flush. The Aquia IV bowl offers TOTO T40 WASHLET+ compatibility for when you are ready to upgrade. The T40 WASHLET+ toilet features a channel on the bowl surface to help conceal your WASHLET+ supply line and power cord for seamless integration. compatible with T40 WASHLET+ electronic bidet seat models only. When paired with its tank, the 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. Additional items needed for installation and use must be purchased separately: compatible tank, wax ring, toilet mounting bolts, water supply lines, and WASHLET+ or seat designed for WASHLET+. TOTO CT446CENT40 Features: TOTO CT446CENT40 Technologies and Benefits: TOTO CT446CENT40 Specifications: