Toilet Fixtures
High Efficiency Toilets (HETs) | Drainline Studies | Specifications and Test Protocols | Plumbing Standards | Flappers & Flush Valve Seals
NAHB Research Center Low-Flow Toilet Study (2002)
The National Association of Home Builders Research Center, in cooperation with Seattle Public Utilities and the East Bay Municipal Utility District of Oakland, CA, released the water closet fixture performance study that was underway for much of 2002. The report details the results of extensive performance testing (with sponges and paper wads) on 49 of the most popular low-flow toilets in the United States and Canada.
NOTE: The results of the NAHBRC testing are not meant to be a direct assessment of which toilets will or will not perform well in a home environment. Only two samples of each toilet model were tested, and the material used in the testing may not be an appropriate substitute for measuring “real-world” toilet performance.
NOTE: Recognizing that the use of sponges and paper wads might not accurately replicate “real-world” demands placed upon a toilet fixture, this study was followed by the development of the MaP testing protocol in 2003 by 22 water provider interests. Many believe that the MaP testing may provide a more realistic assessment of toilet fixture performance than the results of this NAHBRC study.
- Download the Summary NAHBRC Test Report: Water Closet Performance Testing
- Performance ranking of all models in the NAHBRC test
- Top performing toilets in the NAHBRC test that are priced under $100
- A side-by-side comparison of the NAHBRC study results with those reported by Consumers Reports
ULTRA-LOW-FLUSH TOILETS (ULFTs-1.6-gpf)
- Testing of Popular Flushometer Valve/Bowl Combinations (Commercial) (2005)
- Performance Testing of Wall-Mount Siphon-Jet Flushometer Toilet Fixtures (Commercial) (2003)
- Jordan Valley (Utah) Study of ULF & HE Toilet Fixtures (2003)
- Customer Satisfaction Survey (gravity-fed residential toilets) (1999)
- Long-term Durability of Toilet Fixtures (2001)
- Testing of Toilet Fixtures Against Proposed National Standards (2000)
- Functioning of Aging ULF Toilets in Tucson AZ (2000)
- Toilet Flush Volume Study (2001)
- Effectiveness of Data Logging Residential Water Meters to Identify and Quantify Toilet Flush Volumes: A Pilot Study (2004)