Water Use Efficiency Practitioner One Practice Test

WaterSense sets a maximum flush volume for labeled toilets to save water while still performing adequately. The standard is that these toilets flush no more than 1.28 gallons per flush, and many models use less than that. So the true statement is that WaterSense toilets are limited to a maximum of 1.28 gpf. The label does not require every model to flush exactly 1.28 gpf, and some models can be well below the limit. Options suggesting a higher minimum like 2.0 gpf or a minimum of 0.5 gpf don’t fit the WaterSense standard.