10 CFR § 429.30 - Water closets.

---
identifier: "/us/cfr/t10/s429.30"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "10 CFR § 429.30 - Water closets."
title_number: 10
title_name: "Energy"
section_number: "429.30"
section_name: "Water closets."
chapter_name: "DEPARTMENT OF ENERGY"
subchapter_number: "D"
subchapter_name: "ENERGY CONSERVATION"
part_number: "429"
part_name: "CERTIFICATION, COMPLIANCE, AND ENFORCEMENT FOR CONSUMER PRODUCTS AND COMMERCIAL AND INDUSTRIAL EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 6291-6317; 28 U.S.C. 2461 note."
regulatory_source: "76 FR 12451, Mar. 7, 2011, unless otherwise noted."
cfr_part: "429"
---


# 429.30 Water closets.

(a) *Sampling plan for selection of units for testing.* (1) The requirements of § 429.11 are applicable to water closets; and

(2) For each basic model of water closet, a sample of sufficient size shall be randomly selected and tested to ensure that any represented value of water consumption of a basic model for which consumers favor lower values shall be greater than or equal to the higher of:

(i) The mean of the sample, where:

Or,

(ii) The upper 90 percent confidence limit (UCL) of the true mean divided by 1.1, where:

(b) *Certification reports.* (1) The requirements of § 429.12 are applicable to water closets; and

(2) Pursuant to § 429.12(b)(13), a certification report shall include the following public product-specific information: The maximum water use in gallons per flush (gpf), rounded to the nearest 0.01 gallon. For dual-flush water closets, the maximum water use to be reported is the flush volume observed when tested in the full-flush mode.

[76 FR 12451, Mar. 7, 2011; 76 FR 24771, May 2, 2011, as amended at 78 FR 62986, Oct. 23, 2013]