Written by US EPA WaterSense 2:10 pm IAPMO R&T - WaterSense, Industry News

U.S. EPA Released a Draft Version 2.0 Specification for Tank-Type Toilets

The U.S. Environmental Protection Agency (EPA) has released a draft Version 2.0 of its Specification for Tank-Type Toilets to earn the WaterSense® label. Tank-type toilets have been eligible to earn the WaterSense label since the release of the WaterSense Specification for Tank-Type Toilets in 2007. During a formal review of the specification, EPA received feedback from stakeholders indicating that dual-flush toilets may not be reaching the expected water savings due to user preference and confusion regarding the different flushing modes of dual-flush toilets.

In June 2023, EPA issued a Notice of Intent (NOI) to revise the WaterSense Specification for Tank-Type Toilets to obtain feedback on potential revisions and has since decided to move forward with the specification revision. Within the revisions to the specification, EPA modified the water efficiency criteria for dual-flush toilets by eliminating the effective flush volume calculation and instead establishing a singular maximum flush volume requirement for both single-flush toilets and the full-flush mode of dual-flush toilets.

The revisions included in the draft specification may affect the certification status of some WaterSense labeled dual-flush toilets. Manufacturers that maintain certification listings of dual-flush toilets should review the revisions and supporting materials to determine if dual-flush toilets will remain in compliance when Version 2.0 of the specification takes effect. EPA does not anticipate that revisions to the specification will impact the labeled status of single-flush toilets or dual-flush toilets that have a full-flush volume of 1.28 gallons per flush or less. On Tuesday, January 9, from 2:00 p.m. to 4:00 p.m. Eastern, EPA will host a virtual public meeting to discuss the suggested criteria within the draft specification revision. Meeting information will be provided upon registration, and materials will be emailed to registered participants prior to the webinar date.

EPA is interested in your input! If you have comments or suggestions on the draft Version 2.0 of WaterSense Specification for Tank-Type Toilets and supporting materials, please email them to watersense-products@erg.com no later than February 23, 2024. Please forward this email to any other stakeholders or customers who might be interested in commenting on the draft specification.

US EPA WaterSense

WaterSense, a voluntary partnership program sponsored by the U.S. Environmental Protection Agency (EPA), is both a label for water-efficient products and a resource for helping you save water.

The WaterSense label makes it simple to find water-efficient products, new homes, and programs that meet EPA’s criteria for efficiency and performance. WaterSense-labeled products and services are certified to use at least 20 percent less water, save energy, and perform as well as or better than regular models.

WaterSense partners with manufacturers, retailers and distributors, homebuilders, irrigation professionals, and utilities to bring WaterSense to your community. Our partnerships encourage innovation in manufacturing and support sustainable jobs for American workers.

Last modified: June 12, 2024