2 Inch Glazed Trapway for Efficient Waste Removal; Dual-Fed Siphon Jets for Consistent Flush Power; 3 Inch Flush Valve for Strong Water Flow and Flushing Power; High Efficiency Toilet (HET) to Save 20 Percent More Water and Money; Double Nut, Multi-Point Tank-to-Bowl Mounting System for Easy Tool-Free Installation; ADA Compliant; WaterSense Certified ,