Eclipse was the first company to offer a complete line of 1.28-gpf toilets that achieve a Maximum Performance (MaP) rating in a single flush with the development of their high-performance QUATTRO™ flushing system while representing Eclipse's commitment to technological innovation and water conservation.All Eclipse toilets are EPA WaterSense® compliant, high-efficiency toilets (HET) that use less than 1.28 gallons per flush. Compared to the standard (1.6 gpf) toilets on the market, Eclipse toilets use 30% less water, and are among the most efficient products available.