WaterSense toilet guide: what the label certifies, what it saves in five cities, and the picks that clear MaP 800
WaterSense toilet guide: what the label certifies, what it saves in five cities, and the picks that clear MaP 800 By Ariel, last updated September 25, 2026. A WaterSense toilet is a tank toilet that an independent lab has certified to flush with 1.28 gallons or less and still clear 350 grams of test media….