WaterSense
From Toiletpedia
WaterSense is voluntary partnership program sponsored by the U.S. Environmental Protection Agency. The WaterSense label assures customers that the products and services bearing the label will conserve water and perform as intended. For a toilet to be labeled WaterSense, it must be a high efficiency toilet, saving at least 20% more water per flush than required by law. It must be able to remove at least 350 grams of bulk waste as the minimum performance threshold.
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