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Federal Register / Vol. 86, No. 96 / Thursday, May 20, 2021 / Proposed Rules definition to this term. 84 FR 37970 at 37972.
In response to the August 2019 RFI, PMI and the CA IOUs both agreed that the definition from ASME A112.19.2
2018 is consistent with how the industry understands and applies the term, and therefore DOE should adopt the definition. PMI, No. 3 at p. 2; CA
IOUs, No. 4 at pp. 34 In addition, amongst all responses to the August 2019 RFI, no stakeholders commented on the potential test burden of adopting the term as defined in ASME
A112.19.22018. Therefore, because the industry already applies the definition from ASME A112.19.22018, DOE is proposing in this NOPR to adopt the same definition, and add it to 10 CFR
430.2. Furthermore, DOE proposes to replace gravity tank-type toilets with gravity flush tank water closets in 10
CFR 430.32q.
DOE requests comment on its proposal to adopt the definitions from ASME A112.19.22018 for the term gravity flush tank water closet.
DOE requests comment on the proposal to replace the term gravity tank-type toilets with gravity flush tank water closets in its regulations.
5. Siphonic Bowl and Siphonic Action Similar to gravity flush tank water closet, the term siphonic bowl is also not defined in 10 CFR 430.2, but is defined in ASME A112.19.22018. PMI
and the CA IOUs commented that the definition from ASME A112.19.22018
is consistent with how the industry understands and applies the terms, and therefore DOE should adopt these definitions. PMI, No. 3 at p. 2; CA
IOUs, No. 4 at pp. 34 Because the industry already applies the definition from ASME A112.19.22018, DOE is proposing in this NOPR to adopt the same definition, and add it to 10 CFR
430.2. Furthermore, DOE proposes to replace siphonic water closets with siphonic bowl water closets in Appendix T to be consistent with the proposed updates.
DOE requests comment on its proposal to adopt the definition from ASME A112.19.22018 for the term siphonic bowl.
DOE requests comment on the proposal to replace the term siphonic water closets with siphonic bowl water closets in its regulations.
In addition, the proposed definition from ASME A112.19.22018 for siphonic bowl includes the term siphonic action, which is also defined in ASME A112.19.22018. ASME
A112.19.22018 defines siphonic action as the movement of water through a flushing fixture by creating a siphon to
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remove waste material. To keep consistent with the industry standard and to clarify the same term for the water closet test procedure, DOE also proposes to adopt the term siphonic action and its corresponding definition in ASME A112.19.22018.
DOE requests comment on the proposal to adopt the term siphonic action and its corresponding definition from ASME A112.19.22018.
6. Trough-Type Urinals DOE prescribes maximum water use standards for trough-type urinals at 10 CFR 430.32r; however, the term trough-type is not defined. ASME
A112.19.22018 likewise does not define the term trough-type as it applies to urinals. In the August 2019
RFI, DOE requested comment on how to define the term trough-type urinal, and whether there is an industry definition for this term. 84 FR 37972.
In response, the CA IOUs suggested defining trough-type urinal as a urinal designed for simultaneous use by two or more persons. CA IOUs, No. 4 at p. 4.
The CA IOUs stated that this definition provided in a July 2013 publication from the CA IOUs titled Codes and Standards Enhancement CASE
Report, 12 which addresses water efficiency opportunities for water closets and urinals through development of new and updated California Appliance Efficiency Regulations.
The definition suggested by the CA
IOUs is the same as the definition for trough-type urinal found in section 1602i of the California Title 20
Appliance Efficiency Regulations and provides that a trough-type urinal is a a urinal designed for simultaneous use by two or more people. 13 PMI stated that it had no comment on defining troughtype urinal, stating that none of its members manufactured this product.
PMI, No. 3 at p. 2 DOE did not receive any other comments regarding the appropriate definition for trough-type urinals.
DOE tentatively concludes that industry is familiar with the definition of trough-type in the California regulations, and that the definition accurately describes the products at issue. Accordingly, DOE is proposing to use the definition found in Californias regulations trough-type urinals.
12 California Code of RegulationsTitle 20.
Public Utilities and Energy. Docket 12AAER2C;
Analysis of Standards Proposal for Toilets and Urinals Water Efficiency. 2013.
13 The California regulations are available at https ww2.energy.ca.gov/2019publications/CEC140-2019-002/CEC-140-2019-002.pdf.

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DOE requests comment on the proposal to define the term trough-type urinal as a urinal designed for simultaneous use by two or more people. DOE specifically requests comment on whether the proposed definition would include products not currently understood to be trough-type urinals, or whether it would exclude products currently understood to be trough-type urinals. In addition, DOE
requests comments on whether any physical characteristics or features differentiate trough-type urinals from other urinals.
D. Metric Appendix T requires that the water consumption of water closets and urinals be determined using the flush volume in gallons per flush gpf or liters per flush Lpf.
The CA IOUs commented that, in addition to water consumption, DOE
should strongly consider flush performance. CA IOUs, No. 4 at pp. 2
3 Specifically, they stated the water savings from toilets with low gpf rating would not be realized if more than one flush were required to effectively eliminate solid waste; therefore, as toilets become more efficient, it is important to maintain flush performance utility. Id. While ASME
A112.19.22018 includes tests to evaluate the performance of the toilet i.e., how effectively it eliminates waste, the CA IOUs commented that industry stakeholders have expressed concern that these performance tests are not sufficient. Id. The CA IOUs also noted that there are voluntary test procedures to confirm flush performance, as determined through research for the CA IOU CASE Report, and that Maximum Performance MaP Testing: Toilet Fixture Performance Testing Protocol: Version 5March 2013 MaP Testing is the most popular performance testing method in the industry. Id. The CA
IOUs commented that MaP Testing classifies how well a toilet moves waste, and is widely accepted by toilet stakeholders including manufacturers, water utilities and standard-setting entities. Id. The CA IOUs recommended that DOE consider evaluating the appropriateness of these flush performance metrics for evaluating performance in these plumbing applications. Id. at p. 3.
EPCA requires that any test procedures prescribed or amended be reasonably designed to produce test results which measure energy efficiency, energy use, water use, or estimated annual operating cost of a covered product during a representative
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