This new TOTO High-Efficiency Toilet features a 1.28 gallon flush that uses 20% less water than TOTO's standard 1.6 gpf, while delivering the same impressive performance that you have come to expect from TOTO. TOTO Two Piece Toilet-The TOTO® E-Max® low consumption toilets received high ratings during ANSI/ASME and CSA testing at independent laboratories. Designed with a powerful siphon jet flushing action, the toilet offers a large water surface and a glazed trapway.