This standard specifies the terms and definitions, materials, requirements, test methods, inspection rules, marking, packaging, transportation and storage of water-saving domestic water appliances. This standard is applicable to faucets, toilets and toilet systems, toilet flush valves, showers (including showerheads) installed on hot and cold water pipelines in buildings, with a nominal pressure not greater than 0.6 MPa and a medium temperature not greater than 75°C. , manufacturing and testing of household washing machines and household dishwashers. This standard does not apply to bathtub faucets and washing machine faucets.