On July 1, 2023, the national mandatory standard GB 28379-2022 Minimum allowable values of water efficiency and water efficiency grades for flush valves of plumbing fixtures (hereinafter referred to as “the Standard”) came into force.
The Standards’ implementation announcement was published on December 29th, 2022. As a revision of the previous GB 28379-2019, the Standard specifies the minimum allowable value and grade of the water efficiency of the flushing valve of urinals and that of squat toilets, together with the technical requirements and test methods.
The Standard applies to squat toilet flushing valves and urinal flushing valves for use in cold water supply pipes installed in building facilities contingent on whether the water static pressure is or is not greater than 0.6MPa.
Compared with the withdrawal version, the main changes in the Standard include:
· Chapter 1: Application scope changes from “mechanical flush valve for water closet or urinals, pressurized type flush valve for water closet or urinals and non-contact flush valve for water closet or urinals” into “flush valves of plumbing fixtures”.
· Article 3.2: add the terms and definition for the consumption of flushing water.
· Chapter 4: modify the water efficiency grades.
· Chapter 6: change the measurement and calculation.
· Annex 1: add plumbing fixtures for testing use.
The Standard does not adopt any international standards like the version it replaced. Therefore, relevant foreign manufacturers are advised to review the modified parameters and make product changes when necessary.
The Chinese version of the Standard can be downloaded here
https://www.bestao-consulting.com/detail?id=1490&status=bestao_library
If you have any questions about the Standard, or need translation service, please contact assistant@bestao-consulting.com.