The Mainstream One-Piece Chair Height Elongated Toilet from American Standard is a compact, low-profile space-saver with a clean, modern look. Engineered for worry-free reliability and backed by 140 years of American Standard know-how, the sleek one-piece Mainstream toilet eliminates the gaps and crevices where dirt and grime collect making it an easy-to-clean option for the busiest bathroom. This high-efficiency, water-conserving toilet uses just 1.28 gallons of water per flush, saving 20% more water than a standard 1.6 gallons per flush toilet.