2-Piece 0.8 GPF Ultra-High-Efficiency Single Flush Elongated Toilet Featuring Stealth Technology in WhiteReplace your old toilet with the Niagara 2 piece 0. 8 GPF Ultra High Efficiency Single Flush Elongated Toilet Featuring Stealth Technology in White the world's only ultra high efficient toilet. This toilet features patented hydraulic technology, known as Stealth, which uses only 0. 8 GPF (3 LPF). One flush thoroughly evacuates the bowl every time and eliminates double flushing. With water consumption that has cut the industry standard in half, this