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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 25502-2010 Minimum Allowable Values of Water Efficiency and Water Efficiency Grades for Water Closets and the following technical changes have been made with respect to GB 25502-2010 (the previous edition):
——Term and definition of average water consumption of water closet is added;
——Calculation formula of average water consumption in 4.2 of original standard is modified according to GB 6952;
——Water efficiency grade index in Chapter 4 is revised.
This standard was proposed by National Development and Reform Commission and Ministry of Water Resources.
This standard is under the jurisdiction of Subcommittee on Water Use Efficiency of Product and Appliance, National Technical Committee on Industrial Water Conservation of Standardization Administration of China (SAC/TC 442/SC 1).
The previous edition of this standard replaced by this standard is:
——GB 25502-2010.
Minimum Allowable Values of Water Efficiency and Water Efficiency Grades for Water Closets
1 Scope
This standard specifies the minimum allowable values of water efficiency, evaluating values of water conservation, water efficiency grade and test method of water closet.
This standard is applicable to evaluation for water efficiency of various water closets installed in cold water pipeline in building facilities and used on the condition of water supply pressure not greater than 0.6MPa.
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 normative document (including any amendments) applies.
GB 6952 Sanitary Wares
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB 6952 and the followings apply.
3.1
average water consumption of water closet
water consumption of water closet measured and calculated according to the test method and calculation formula specified in the standard
3.2
minimum allowable values of water efficiency for water closet
permissible maximum water consumption of water closet in accordance with the general technical requirements, flushing function requirements, matchability technical requirements under the test condition specified in the standard
Note: water consumption of single-flush water closet refers to the average water consumption and that of dual-flush water closet includes average water consumption and full-flushing maximum water consumption.
3.3
evaluating values of water conservation for products
permissible maximum water consumption of water-saving water closet in accordance with the general technical requirements, flushing function requirements, matchability technical requirements under the test condition specified in the standard
Notes:
1 Evaluating values of water conservation is adopted for evaluating water-saving water closet.
2 Water consumption of single-flush water closet refers to the average water consumption and that of dual-flush water closet includes average water consumption and full-flush maximum water consumption.
4 Technical Requirements
4.1 Basic requirements
Under the test condition specified in the standard, sanitary ware water closet shall meet the general technical requirements, functional requirements, matchability technical requirements specified in GB 6952, and the flushing function requirements and matchability technical requirements of other water closets shall meet the requirements of corresponding standard. Water tank accessories shall meet requirements of relevant standards.
4.2 Water efficiency grade of water closet
4.2.1 Water efficiency grade of water closet is classified into three grades, where Grade 3 water efficiency is the minimum.
4.2.2 The water consumption of water closet of each grade shall meet the requirements specified in Table 1.
Table 1 Water Efficiency Grade Index of Water Closet L
Water efficiency grade of water closet Grade 1 Grade 2 Grade 3
Average water consumption of water closet ≤4.0 ≤5.0 ≤6.4
Full-flush water consumption of dual-flush water closet ≤5.0 ≤6.0 ≤8.0
Note: in each water efficiency grade of dual-flush water closet, the half-flush average water consumption is not greater than 70% the maximum limit value of the full-flush water consumption.
4.3 Minimum allowable values of water efficiency for water closet
Water consumption of water closet specified for Grade 3 water efficiency.
4.4 Evaluating values of water conservation for products
Water consumption of water closet specified for Grade 2 water efficiency.
5 Calculation and Test Method
5.1 Calculation for average water consumption of water closet
5.1.1 Average water consumption of single-flush water closet
Average water consumption of single-flush water closet is namely the arithmetic average of measured water consumption.
5.1.2 Average water consumption of dual-flush water closet
Average water consumption of dual-flush water closet is calculated according to Formula (1):
(1)
Where,
V——the average water consumption of dual-flush water closet, L;
V1——the arithmetic average of full-flush water consumption of dual-flush water closet, L;
V2——the arithmetic average of half-flush water consumption of dual-flush water closet, L.
5.2 Test method of water closet
The water consumption test of water closet is carried out according to the test method specified in GB 6952.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Technical Requirements
5 Calculation and Test Method
ICS 91.140.70
Q31
中华人民共和国国家标准
GB25502—2017
代替GB25502—2010
坐便器水效限定值及水效等级
Minimum allowable values of water efficiency and water efficiency grades for water closets
2017-03-09发布
2017-09-01实施
中华人民共和国国家质量监督检验检疫总局
中国国家标准化管理委员会 发布
前言
本标准按照GB/T 1.1—2009给出的规则起章。
本标准代替GB 25502—2010《坐便器用水效率限定值及用水效率等级》，与GB 25502—2010相比，主要技术变化如下：
——增加了坐便器平均用水址的术语和定义；
——按GB 6952修改了原4.2中的平均用水址的计算公式；
——修订了第4章中的水效等级指标。
本标准由国家发展和改革委员会、水利部提出。
本标准由全国工业节水标准化技术委员会用水产品和器具用水效率分技术委员会（SAC/TC442/SC1）归口。
本标准起草单位：中国标准化研究院、安徽省产品质量监督检验研究院、义源（上海）节能环保科技有限公司、中国建材检验认证集团（陕西）有限公司、九牧厨卫股份有限公司、惠达卫浴股份有限公司、路达（厦门）工业有限公司、佛山市顺德区乐华陶瓷洁具有限公司、佛山市法恩洁具有限公司、辽宁苏泊尔陶瓷工业有限公司、新乐卫浴（佛山）有限公司、乐家（中国）有限公司、广东安彼科技有限公司、广东荣信卫浴实业有限公司、广东康纳卫浴科技有限公司、潮州市牧野陶瓷制品有限公司、安徽雪雨洁具有限公司、厦门安百利塑胶有限公司、河南浪迪瓷业有限公司、长葛市东宏陶瓷制品有限公司、长高市远东陶瓷有限公司、浙江苏尔达洁具有限公司、浙江金博流体控制有限公司、浙江高博卫浴有限公司、名盾有限公司、玉环县金龙欧浴洁具有限公司。
本标准主要起草人：朱春雁、朱双四、白雪、林森、王玉洁、陈春虹、才宽、程晓敏、张卫星、商蓓、林孝发、王彦庆、许传凯、严邦平、方春、戴爱春、胡亚萍、彭溢群、苏瑶广、陈荣湘、陈淑定、陈克平、马士永、陈家旭、王飞、于朝阳、胡辉、苏光茂、苏林峰、赖仁忠、毛通连、黄优春。
本标准所代替标准的历次版本发布情况为：
——GB 25502—2010.
坐便器水效限定值及水效等级
1 范围
本标准规定了坐便器的水效限定值、节水评价值、水效等级和试验方法。
本标准适用于安装在建筑设施内冷水管路上，供水压力不大于0.6MPa条件下使用的各类坐便器的水效评价。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改单）适用于本文件。
GB 6952 卫生陶瓷
3 术语和定义
GB 6952界定的以及下列术语和定义适用于本文件。
3.1
坐便器平均用水量 average water consumption of water closet
依据标准规定的试验方法和计算公式进行实测和计算得出的坐便器的用水量。
3.2
坐便器水效限定值 minimum allowable values of water efficiency for water closet
在标准规定的测试条件下，坐便器在符合通用技术要求、冲洗功能要求、配套性技术要求的情况下，所允许的最大用水量。
注：单冲坐便器的用水量是指其平均用水量，双冲坐便器的用水最包括平均用水量和金冲最大用水量。
3.3
坐便器节水评价值 evaluating values of water conservation for products
在标准规定的测试条件下，在符合通用技术要求、冲洗功能要求、配套性技术要求的情况下，节水型坐便器所允许的最大用水量。
注1：节水评价值是评价节水型坐便器的规定要求。
注2：单冲坐便器的用水量是指其平均用水量，双冲坐便器的用水量包括平均用水量和全冲最大用水量。
4 技术要求
4.1 基本要求
在标准规定的测试条件下，卫生陶瓷坐便器应符合GB 6952规定的通用技术要求、功能要求、便器配套性技术要求，其他坐便器的冲洗功能要求、便器配套性技术要求应符合其依据的标准。水箱配件应符合相关标准的规定要求。
4.2 坐便器水效等级
4.2.1 坐便器的水效等级分为3级，其中3级水效最低。
4.2.2 各等级坐便器的用水量应符合表1的规定。
表1坐便器水效等级指标 单位为升
坐便器水效等级 1级 2级 3级
坐便器平均用水量 ≤4.0 ≤5.0 ≤6.4
双冲坐便器全冲用水量 ≤5.0 ≤6.0 ≤8.0
注：每个水效等级中双冲坐便器的半冲平均用水最不大于其全冲用水量最大限定值的70%。
4.3 坐便器水效限定值
水效等级3级中规定的坐便器用水量。
4.4 坐便器节水评价值
水效等级2级中规定的坐便器用水量。
5 计算和试验方法
5.1 坐便器平均用水量计算
5.1.1 单冲坐便器平均用水量
单冲坐便器的平均用水量即为其实测用水量的算术平均值。
5.1.2 双冲坐便器平均用水量
双冲坐便器的平均用水量按式（1）计算：
………………………（1）
式中：
——双冲坐便器的平均用水量，单位为升（L）；
——双冲坐便器全冲用水量的算术平均值，单位为升（L）；
——双冲坐便器半冲用水量的算术平均值，单位为升（L）。
5.2 坐便器试验方法
依据GB 6952规定的试验方法进行坐便器用水量的试验。
