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See Chinese contents: GB 28377-2019 GB 28377-2019: Minimum allowable values of water efficiency and water efficiency grades for urinals
This Standard specifies the water efficiency grade, technical requirements and test methods of the urinals. This Standard is applicable to the water efficiency evaluation of all types of urinals (excluding waterless urinals) installed on the cold-water supply pipelines in building facilities and the hydrostatic pressure of the water supply is no greater than 0.6MPa.
