The transitionally-styled 1 GPF Toilet Tank offers superior flushing performance to deliver the cleanest flush ever engineered. Designed to be eco-friendly, the 1.0 gallon per flush conserves water without compromising performance. This right height toilet includes American Standard CleanCurve® Rim Design that eliminates hard to reach surfaces to make cleaning virtually effortless. American Standard EverClean® surface impedes the growth of odor-causing bacteria, mold, and mildew on the toilet surface.