look for Watersense

Look for the new WaterSense label on toilets with FLUSHMATE® IV inside.

WaterSense, a partnership program sponsored by the U.S. Environmental Protection Agency (EPA), makes it easy for Americans to save water and protect the environment. As part of the WaterSense labeling plan, home products such as bathroom faucets and toilets will boast the WaterSense logo - but only if they perform at least 20 percent more efficiently than their less-efficient counterparts.

The WaterSense program offers consumers a simple way to make product choices that use less water, with no sacrifice of quality or product performance. FLUSHMATE® IV makes it easy by meeting and exceeding the WaterSense criteria - giving you exceptional efficiency and true high performance.

The WaterSense label is used on toilets that are certified by independent laboratory testing to meet rigorous criteria for both performance and efficiency. Only high-efficiency toilets that complete the third-party certification process can earn the WaterSense label.


The original minimum performance benchmark adopted by MaP was 250 grams (250g) of waste. That is, a toilet should completely evacuate at least 250g of waste in a single flush. The U.S. Environmental Protection Agency (EPA) has adopted 350g as the minimum performance threshold for HETs promoted within its new WaterSense program. Furthermore, most water utilities currently adopting toilet replacement rebate and installation programs (with HETs) are also establishing their minimum performance threshold at 350g (some are as high as 500g).

Efficiency Rating

The Efficiency Rating gives an overall performance of each toilet technology. The higher the Efficiency Rating value, the more effective and efficient the toilet is in performance and saving water.

Toilet Technology Total Fixtures
Average Grams Removed in Single Flush Efficiency Rating
(grams per gallon)
1.6-gpf Gravity-Fed 207 Fixtures 654 409
1.6-gpf Pressure Assist 41 Fixtures 895 652
1.0-gpf Pressure-Assist 27 Fixtures 730 663
Dual-Flush 45 Fixtures 585 366
1.28 Gravity-Fed 6 Fixtures 467 365


This information is based on 9th edition of MaP Testing results.
Click here to see the full MaP test protocol or here to see only the results.
To download the complete list of toilet models based on their Efficiency Rating listing click here.