Most are single-flush models, though the top-rated Glacier Bay model is a dual-flush toilet, meaning you can use minimal water for most flushes. All of the models below are WaterSense certified by ...

In fact, Consumer Reports' most recent toilet tests name two $100 WaterSense models as CR Best ... flush. And all the toilets we tested this time aced our liquid-waste tests—a first. Dual ...

The best bet is to forego automatic flush toilets ... the 1.6 gallons mandated by the federal government. However, a dual-flush toilet can save even more water, as it uses less for liquid waste ...