Who makes HETs?
Most major toilet manufacturers make HETs. However, only WaterSense®-approved HETs that use 1.28 gallons per flush or less are eligible for a rebate. That means that even WaterSense®-approved dual flush HETs must use 1.28 gallons per flush or less for each of the toilet’s flush options. Note: Many high-efficiency toilets are sold in two parts, with the tank and bowl sold separately.
When components combine to make a WaterSense® labeled product, tanks should include the words “When used in combination with [bowl model number/name]” in close proximity to the label, and similarly with bowl labeling.
Only the combinations provided on the WaterSense Website (http://www.epa.gov/WaterSense/product_search.html) have been certified under the WaterSense® label.