This 2-piece 0.8 GPF Ultra-High-Efficiency Single Flush Elongated Toilet featuring Stealth Technology in White from Niagara is the world first ultra-high-efficiency toilet. Powering the toilet is Stealth, patented vacuum-assist technology from Niagara, which uses only 0.8 GPF (3 LPF) while still providing a powerful flush that thoroughly evacuates the bowl every time, no need to double flush. The flapperless design eliminates chains and levers, making maintenance and leaks a thing of the past. Also, this toilet virtually eliminates all refill noise as the fill valve is never exposed. Niagara toilets deliver a quiet, powerful and proven flush, saving thousands of gallons of water with no change in consumer use or behavior.