Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 28378-2012 Minimum allowable values of water efficiency and water efficiency grades for showers and the following main technical changes have been made with respect to GB 28378-2012:
——the scope of standard is modified;
——some terms and definitions are modified;
——the basic requirements are modified;
——the spray force requirements are added;
——the index of water efficiency grade for shower is modified;
——the index of uniformity of flow is modified.
This standard was proposed by the Standardization Administration of the People’s Republic of China and the Department of Resource Conservation and Environmental Protection of the National Development and Reform Commission of the People's Republic of China.
This standard is under the jurisdiction of the Standardization Administration of the People’s Republic of China.
This standard was firstly issued in April, 2012 and is revised for the first time.
Minimum allowable values of water efficiency and water efficiency grades for showers
1 Scope
This standard specifies the water efficiency grade, technical requirements and test methods for shower.
This standard is applicable to the water efficiency evaluation of showers (including shower head or its combinations) used in sanitary facilities such as lavatories (restrooms, bathrooms) and shower rooms installed in buildings with nominal pressure (static pressure) not greater than 1.0 MPa and medium temperature of 4℃~90℃.
It is not applicable to the shower with heating apparatus and with constant temperature.
2 Normative references
The following referenced documents are indispensable for the application of this document. 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 established in GB/T 33733 and the following apply.
3.1
uniformity of flow
ΔF
the difference between the highest average flow and the lowest average flow of the hand-held shower head under different test pressures
3.2
minimum allowable values of water efficiency for showers
the maximum allowable flow of the shower under the test conditions specified in the standard
3.3
evaluating values of water conservation for showers
the maximum allowable flow of water-conservation shower under the test conditions specified in the standard
Note: The evaluating values of water conservation is a requirement for evaluating the water-conservation shower.
3.4
spray force
P
the impact force in case of spraying of the hand-held shower head under the test conditions specified in the standard
4 Water efficiency grades for showers
4.1 The water efficiency for showers is classified into 3 grades, with Grade 3 representing the lowest one.
4.2 The flow of all showers shall meet those specified in Table 1.
4.3 If the hand-held shower head is equipped with multiple water outlet modes, the flow of each water outlet mode shall be tested separately, and the water efficiency grade of the maximum flow is taken as the water efficiency for the shower.
4.4 If the fixed shower head is equipped with multiple water outlet functions, the flow of each water outlet function shall be tested separately, and the water efficiency grade of the maximum flow is taken as the water efficiency grade for the shower.
Table 1 Index of water efficiency grade for shower In L/min
Type Flow
Grade 1 Grade 2 Grade 3
Hand-held shower head ≤4.5 ≤6.0 ≤7.5
Fixed shower head ≤9.0
5 Technical requirements
5.1 Basic requirements
Showers shall meet the requirements of the standard prescribed expressly.
5.2 Spray force
As tested by Annex A, the average spray force of hand-held shower head shall not be less than 0.85 N.
Note: If the shower head is equipped with multiple water outlet modes, the maximum average spray force shall be taken.
5.3 Uniformity of flow
As tested by Annex A, the uniformity of maximum outlet flow of hand-held shower head shall not be greater than 4.0 L/min.
5.4 Minimum allowable values of water efficiency for showers
The minimum allowable values are Grade 3 of the water efficiency grade.
5.5 Evaluating values of water conservation for showers
The evaluating values are Grade 2 of the water efficiency grade.
6 Test methods
The test methods for spray force, flow and uniformity of flow shall be carried out according to Annex A.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Water efficiency grades for showers
5 Technical requirements
6 Test methods
Annex A (Normative) Test methods
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 28378-2012 Minimum allowable values of water efficiency and water efficiency grades for showers and the following main technical changes have been made with respect to GB 28378-2012:
——the scope of standard is modified;
——some terms and definitions are modified;
——the basic requirements are modified;
——the spray force requirements are added;
——the index of water efficiency grade for shower is modified;
——the index of uniformity of flow is modified.
This standard was proposed by the Standardization Administration of the People’s Republic of China and the Department of Resource Conservation and Environmental Protection of the National Development and Reform Commission of the People's Republic of China.
This standard is under the jurisdiction of the Standardization Administration of the People’s Republic of China.
This standard was firstly issued in April, 2012 and is revised for the first time.
Minimum allowable values of water efficiency and water efficiency grades for showers
1 Scope
This standard specifies the water efficiency grade, technical requirements and test methods for shower.
This standard is applicable to the water efficiency evaluation of showers (including shower head or its combinations) used in sanitary facilities such as lavatories (restrooms, bathrooms) and shower rooms installed in buildings with nominal pressure (static pressure) not greater than 1.0 MPa and medium temperature of 4℃~90℃.
It is not applicable to the shower with heating apparatus and with constant temperature.
2 Normative references
The following referenced documents are indispensable for the application of this document. 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 established in GB/T 33733 and the following apply.
3.1
uniformity of flow
ΔF
the difference between the highest average flow and the lowest average flow of the hand-held shower head under different test pressures
3.2
minimum allowable values of water efficiency for showers
the maximum allowable flow of the shower under the test conditions specified in the standard
3.3
evaluating values of water conservation for showers
the maximum allowable flow of water-conservation shower under the test conditions specified in the standard
Note: The evaluating values of water conservation is a requirement for evaluating the water-conservation shower.
3.4
spray force
P
the impact force in case of spraying of the hand-held shower head under the test conditions specified in the standard
4 Water efficiency grades for showers
4.1 The water efficiency for showers is classified into 3 grades, with Grade 3 representing the lowest one.
4.2 The flow of all showers shall meet those specified in Table 1.
4.3 If the hand-held shower head is equipped with multiple water outlet modes, the flow of each water outlet mode shall be tested separately, and the water efficiency grade of the maximum flow is taken as the water efficiency for the shower.
4.4 If the fixed shower head is equipped with multiple water outlet functions, the flow of each water outlet function shall be tested separately, and the water efficiency grade of the maximum flow is taken as the water efficiency grade for the shower.
Table 1 Index of water efficiency grade for shower In L/min
Type Flow
Grade 1 Grade 2 Grade 3
Hand-held shower head ≤4.5 ≤6.0 ≤7.5
Fixed shower head ≤9.0
5 Technical requirements
5.1 Basic requirements
Showers shall meet the requirements of the standard prescribed expressly.
5.2 Spray force
As tested by Annex A, the average spray force of hand-held shower head shall not be less than 0.85 N.
Note: If the shower head is equipped with multiple water outlet modes, the maximum average spray force shall be taken.
5.3 Uniformity of flow
As tested by Annex A, the uniformity of maximum outlet flow of hand-held shower head shall not be greater than 4.0 L/min.
5.4 Minimum allowable values of water efficiency for showers
The minimum allowable values are Grade 3 of the water efficiency grade.
5.5 Evaluating values of water conservation for showers
The evaluating values are Grade 2 of the water efficiency grade.
6 Test methods
The test methods for spray force, flow and uniformity of flow shall be carried out according to Annex A.
Contents of GB 28378-2019
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Water efficiency grades for showers
5 Technical requirements
6 Test methods
Annex A (Normative) Test methods
