KOHLER Memoirs Stately 1.28 GPF Single Flush Toilet Tank Only with AquaPiston Flush Technology in WhiteKOHLER Memoirs Stately 1. 28 GPF Toilet Tank Elevate your bathroom's elegance with the KOHLER Memoirs Stately Toilet Tank, featuring AquaPiston Flush Technology for powerful and efficient performance. Crafted in classic white vitreous china, this tank offers water savings without sacrificing style or function. Key Features: Water Efficiency: Uses only 1. 28 gallons per flush, saving up to 16,500 gallons annually compared to older models. AquaPiston