GDF20102 The Maxwell® Dual Flush toilet features two buttons on the top of the tank to dictate the flush rate one flushing 1.1 gpf (4 Lpf) for liquid and one flushing 1.6 gpf (6 Lpf) for solid. This toilet is WaterSenseertified for its efficiency and performance. The round front on this bowl is perfect for bathrooms with smaller footprints.