Niagara's Power One™ high-efficiency toilet uses only 1.0 gallon per flush, making it the lowest-flushing pressure-assist toilet available on the market! The toilet uses up to 71% less water than older conventional toilets, making for huge water and utility bill savings. The Power One™ uses Sloan's Flushmate IV® pressure-assist flush system, which gives a quieter flush than other conventional, pressure-assist toilets, while providing a high-performance, clog-free, one-time flush that clears all waste in the bowl. Meeting stringent EPA WaterSense criteria and offering a 10-year warranty on internal components, this is an ideal toilet for both retrofitting and new construction.