This standard specifies the minimum allowable values of water efficiency, evaluating values of water conservation, water efficiency grades and test methods for faucets.
This standard is applicable to the water efficiency evaluation of washbasin faucets, kitchen faucets, bidgets faucets and ordinary washing faucets that are installed at ends of cold and hot water supply pipelines in buildings, with nominal pressure (static pressure) of not greater than 1.0 MPa and medium temperature of 4℃~ 90℃.
This standard is not applicable to water faucets with delayed self-closing function.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 33733 Terminology and classification for the kitchen and sanitary ware fittings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 33733 and the following apply.
3.1
Uniformity of flow
△F
the difference between the highest average flow and the lowest average flow of the faucet under different test pressures
3.2
minimum allowable values of water efficiency for faucet
the maximum allowable flow of the faucet under the test conditions specified in the standard
3.3
evaluating values or water conservation for faucet
the maximum allowable flow of the water-conservation faucet under the test conditions specified in the standard
Note: The evaluating values of water conservation are a requirement for evaluating the water-conservation faucets.
