GB28379-2022
Minimum allowable values of water efficiency and water efficiency grades for flush valves of plumbing fixtures
便器冲洗阀水效限定值及水效等级
GB 28379-2022 is a current mandatory Chinese national standard for Minimum allowable values of water efficiency and water efficiency grades for flush valves of plumbing fixtures. It appears in the Construction compliance cluster with a environmental protection focus and has an implementation date of Jul 1, 2023.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the water efficiency limits and grades for flush valves of plumbing fixtures, specifically targeting squatter pan flush valves and urinal flush valves. It applies to valves installed on cold water supply pipelines in building facilities with a static water pressure not exceeding 0.6 MPa. It does not apply to other types of sanitary ware or valves operating outside the specified pressure range. The standard replaces the previous version GB 28379-2012 and broadens the scope from specific valve types to general flush valves.
Technical requirements
The standard classifies water efficiency into 3 grades, with Grade 1 representing the highest efficiency. It defines the minimum allowable values of water efficiency as the requirements for Grade 3. The standard sets specific limits on the average flushing water consumption for both single-flush and dual-flush squatter pan valves, as well as urinal valves. For dual-flush valves, it also regulates the full-flush water consumption and mandates that the half-flush average must not exceed 70% of the full-flush maximum limit. Manufacturers must ensure their products meet at least Grade 3 requirements to be compliant. Additionally, the standard requires that flush valves, when installed with their designated plumbing fixtures or with the specified test fixtures, must meet the corresponding flushing functional requirements.
Testing methods
Testing for squatter pan flush valves is conducted according to GB 30717, while urinal flush valve testing follows GB 28377. For valves without designated matching fixtures, testing must be performed using the test fixtures defined in the standard's annex. The standard provides detailed dimensional and material specifications for test squatter pans and test urinals (including nozzle-type and flush-hole types). Testing involves measuring the water volume from the moment the valve opens to when it fully closes, under specified dynamic pressure conditions. Calculations for average water consumption differ between single-flush and dual-flush valves, with the latter using a specific formula to derive the average from full and half-flush volumes.
FAQs
What products are regulated under GB 28379-2022?
GB 28379-2022 regulates flush valves of plumbing fixtures, specifically squatter pan flush valves and urinal flush valves used in building cold water supply systems with a static pressure up to 0.6 MPa.
Are there any updates from the previous version of GB 28379?
Yes, compared to GB 28379-2012, this 2022 version broadens the scope to general flush valves, adds the definition of flushing water consumption, updates water efficiency grade indicators, and introduces requirements for test plumbing fixtures in the annex.
What is the minimum water efficiency requirement for compliance?
The minimum allowable value of water efficiency corresponds to Grade 3 in the standard's classification. Products must meet or exceed this limit to be legally compliant in the Chinese market.
The summary above provides a high-level overview of GB 28379-2022. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 28379-2022 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Management
- CCS
- Y71
- ICS
- 91.060
- Competent department
- Standardization Administration of China
- Technical committee
- National Technical Committee on Water Conservation of Standardization Administration of China
Relationships
Replaces:GB 28379-2012