Final Specification for Tank-Type Toilets

On May 19, 2011 EPA released a revised version of the Tank-Type High-Efficiency Toilet Specification (version 1.0). The new version is now called the WaterSense Specification for Tank-Type Toilets (version 1.1). This version contains some minor revisions, incorporates previous clarifications on adjustability and certification and labeling of tanks and bowls manufactured by different companies, and provides new clarifications for product/product packaging marking and labeling. Manufacturers have until November 1, 2011 to be in compliance with the new requirements.

• Version 1.1 of the WaterSense Specification for Tank-Type Toilets (PDF) (14 pp, 108K, About PDF)
• Summary of Revisions to the WaterSense Specification for Tank-Type Toilets (PDF) (5 pp, 52K, About PDF)

Version 1.1 of the WaterSense Specification for Tank-Type Toilets replaces Version 1.0, which EPA released a final specification on January 24, 2007. For more information about the WaterSense specification development process for toilets, please see the Tank-Type Toilet Specification Background Materials and the Tank-Type Toilet Frequent Questions page.

For more information about other specifications, please visit our compendium page.