max totoToto toilets have numerous advanced flushing technologies that include E-Max, G-Max, Cyclone, Tornado, Dual-Max, and Double-Cyclone flushing systems. These trademarkToto Ultramax uses the G max flushing system, while the Toto Ultramax II uses the Toto tornado flushing. Toto’s G max flushing system uses 1.6 gallons of water per flush, while the Tornado flush uses 1.28 gallons per flush.