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High-Efficiency Toilet (HETs) Testing

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 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. Zurn Industries offers HETs with the WaterSense label. 

At Zurn, performance testing is imperative to bringing high quality and superior performing fixtures to the market. Two of the recognized criteria for performance testing within the U.S. are ANSI/ASME A112.19.9 Hydraulic Performance Requirements for Water Closets and Maximum Performance Testing (MaP Testing).

These tests were developed to allow fixture designers and others (cities and municipalities) a way to standardize and benchmark performance. All fixtures must pass these test criteria. Constant and vigilant testing is critical to the HET/HEU success and market acceptance. ANSI performance tests include:

1.  Water Consumption: The amount of water consumed per flush.
2.  Ink-Line: Test is designed to ensure proper bowl rinse.
3.  Dye Test: Test is designed to evaluate bowl water exchange.
4.  Trap Seal: Test to ensure the fixture fills and has proper seal.
5.  Ball Removal: Tests evacuation.
6.  Granule Removal: Tests evacuation.
7.  Line Carry: Test determines how well solids are carried through the drain line.
8.  Splash Test: Test ensures that excess splash does not occur during flush cycle.
Zurn HETs create measurable reductions in water usage and consumption.
To see how much water you can save with your next project, check out our Water Usage Calculator.