Residential one-piece toilets with good reviews include the Toto Ultramax II, American Standard Champion 4 and the Danze Orrington high efficiency toilet. Quality two-piece residential toilets include the American Standard H2Option Siphonic Dual Flush and the Toto Drake, as of 2015.
The Toto Ultramax II double cyclone toilet, which is WaterSense approved for high efficiency, features an elongated bowl with a SanaGloss glaze finish. The Ultramax II one-piece toilet is easier to clean than most two-piece models; however, it is more difficult to install without the assistance of a professional.
The two-piece dual flush American Standard H2Option features Siphonic flushing action and a chrome-plated top mount push button actuator. The H2Option is WaterSense certified for high efficiency and low consumption.