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Home > By DEPARTMENTS > Green Operations > Standard Operating Procedures for Green and Sustainable Business Operations > Water Efficiency

Water Efficient Toilets & Urinals

High-efficiency toilets and urinals provide one of the highest water savings of any product in offices, restaurants, public buildings, etc.

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WaterSense Certified High-Efficiency Toilet Products

EPA water sense high efficiency water conservation toilet and urinal WaterSense estimates there are currently 222 million residential toilets in the United States. In addition to the existing stock, approximately 10 million new toilets are sold each year for installation in new homes or replacement of aging fixtures in existing homes. Residential toilets account for approximately 30 percent of indoor residential water use in the United States—equivalent to more than 2.1 trillion gallons of water consumed each year.

The WaterSense Program developed this Specification to address criteria for improvement and recognition of water-efficient and high-performance tank-type toilets. These toilets are commonly found in residential and light commercial settings and include the standard gravity type found in most homes, pressure assisted, and electrohydraulic assisted toilets. The majority of these fixtures are single flush toilets, toilets with one constant flush volume, though an increasing number of dual flush models are coming to market.

Dual flush toilets have two flush volumes—a full flush for solids and a reduced flush for liquids only. WaterSense initially focused on residential toilets because they are the largest water consuming fixture in homes.

Under federal law, toilets must not exceed 1.6 gallons per flush (gpf). High-efficiency toilets (HETs) go beyond the standard and use less than 1.3 gpf. The EPA's WaterSense label is used on HETs that are certified by independent laboratory testing to meet rigorous criteria for both performance and efficiency. Only HETs that complete the third-party certification process can earn the WaterSense label. Go to for more information.

High-Efficiency Toilet (HET)

The High-Efficiency Toilet (HET) flushes at 20 percent below a ULFT, equating to 1.28 gallons per flush or less. The average water savings for HETs is estimated to be 19,000 gallons per year when replacing an average, non-efficient toilet and 4,000 gallons per year when replacing a ULFT.

Ultra-Low-Flush Toilets

Ultra-Low-Flush Toilets (ULFTs) use 15,000 gallons LESS water annually than non-ULFTs. By replacing your toilets, you can save more than $75 per year, per fixture in water and sewage costs.

High-Efficiency Urinals

High-Efficiency Urinals (HEU) are urinals that use 0.5 gallons per flush or less - at least one half of the amount of water used to flush the average urinal.

Based on data from studies of actual usage, these urinals save 20,000 gallons of water per year with an estimated 20-year life. High-Efficiency Urinals are making a significant difference in water usage, water bills and our environment.

*gpf = gallons per flush

List of Suppliers That Manufacture High Efficiency Products

American Standard


Caroma Industries

Crane Plumbing

Eljer Plumbingware

Gerber Plumbing Fixtures

Kohler Company

Mansfield Plumbing

Niagara Conservation Corp.


St . Thomas Creations




WP Industries



For more information about rebates, incentives and water conservation strategies, visit

Rebates are available from the Metropolitan Water District - SoCal

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