WaterSense Performance Overview: Flushometer-Valve Toilets (pdf) (317.53 KB, April 2022)įlushometer valve toilets are also known as flushometer-valve water closets in plumbing standards.WaterSense Performance Overview: Ensuring Products Perform (pdf) (178.51 KB, April 2022).See the Performance Overview for more information on how WaterSense assessed performance when developing the specification. Minimum flush volume: Set at one gallon per flush to ensure adequate flow and transport of solid waste through the drainline.Waste extraction: Ability to clear soybean paste test media and toilet paper (meant to be representative of human waste) from the bowl.Drainline waste transport: Ability to transport waste media through a drainline.Bowl surface cleaning: Ability to clean the surface of the bowl.Mixed testing media flushability: Ability to flush testing media of different sizes and density (i.e., floating versus sinking media).To address this concern, EPA carefully evaluated available drainline studies and data and as a result, instituted a minimum flush volume of 1.0 gallon per flush.Īll WaterSense labeled flushometer-valve toilets are independently certified to meet the same rigorous performance criteria as standard toilets (the minimum flush volume is in addition), in the following areas: However, stakeholders expressed concern that use of high-efficiency flushometer-valve toilets may result in blockages within commercial buildings with longer drainlines. WaterSense used criteria from the WaterSense Specification for Tank-Type Toilets as the basis for its specification criteria for flushometer-valve toilets.
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That’s equivalent to nearly one full day’s flow of water over Niagara Falls! Performanceįlushometer-valve toilets are expected to perform similarly to tank-type toilets. If commercial facilities nationwide replaced all of their older, inefficient flushometer-valve toilets with WaterSense labeled models, it could save an estimated 39 billion gallons of water per year. Of those savings, nearly 870,000 gallons of water and $7,600 in water costs per year can be achieved by replacing the toilets in the women's restrooms alone. By replacing old, inefficient flushometer-valve toilets with WaterSense labeled models, a 10-story office building with 1,000 occupants could save nearly 1.2 million gallons of water and nearly $10,000 per year.
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