The M128 Toilet Express is a powerful, fast yet quiet high-efficiency toilet that uses 1.28 GPF (gallons per flush). Featuring a large 3" flapper flush valve. The M128 empties the tank in less than 3 seconds while the high-performance power jet system efficiently clears waste from the bowl. The M128 scored 1000 gm (gram) on the MAP (Maximum Achievable Pressure) test. The M128 also features a stylish tank with a side mounted trip lever and sanitary bar for easy cleaning. This toilet additionally features the Quick connect system which makes mounting the tank faster with pre-installed tank-to-bowl bolts and gasket. Rough-in dimensions: 12". Bowl height: 15" high.