American Standard 4225A104.021 Champion PRO 1.28-Gallon Per Flush Toilet Tank, Bone High-Efficiency Toilet (HET) Operates at Ultra-Low Consumption Rate of 1.28--Gallons Per Flush Meets EPA Water Sense Criteria Ever Clean Surface Included 12-Inch Rough-In 4-Inch Piston-Action Accelerator Flush Valve