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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
中華人民共和國國家標準
GB25502—2017
代替GB25502—2010
坐便器水效限定值及水效等級
Minimum allowable values of water efficiency and water efficiency grades for water closets
2017-03-09發布
2017-09-01實施
中華人民共和國國家質量監督檢驗檢疫總局
中國國家標準化管理委員會 發布
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前言
本標準按照GB/T 1.1—2009給出的規則起章。
本標準代替GB 25502—2010《坐便器用水效率限定值及用水效率等級》，與GB 25502—2010相比，主要技術變化如下：
——增加了坐便器平均用水址的術語和定義；
——按GB 6952修改了原4.2中的平均用水址的計算公式；
——修訂了第4章中的水效等級指標。
本標準由國家發展和改革委員會、水利部提出。
本標準由全國工業節水標準化技術委員會用水產品和器具用水效率分技術委員會（SAC/TC442/SC1）歸口。
本標準起草單位：中國標準化研究院、安徽省產品質量監督檢驗研究院、義源（上海）節能環保科技有限公司、中國建材檢驗認證集團（陜西）有限公司、九牧廚衛股份有限公司、惠達衛浴股份有限公司、路達（廈門）工業有限公司、佛山市順德區樂華陶瓷潔具有限公司、佛山市法恩潔具有限公司、遼寧蘇泊爾陶瓷工業有限公司、新樂衛浴（佛山）有限公司、樂家（中國）有限公司、廣東安彼科技有限公司、廣東榮信衛浴實業有限公司、廣東康納衛浴科技有限公司、潮州市牧野陶瓷制品有限公司、安徽雪雨潔具有限公司、廈門安百利塑膠有限公司、河南浪迪瓷業有限公司、長葛市東宏陶瓷制品有限公司、長高市遠東陶瓷有限公司、浙江蘇爾達潔具有限公司、浙江金博流體控制有限公司、浙江高博衛浴有限公司、名盾有限公司、玉環縣金龍歐浴潔具有限公司。
本標準主要起草人：朱春雁、朱雙四、白雪、林森、王玉潔、陳春虹、才寬、程曉敏、張衛星、商蓓、林孝發、王彥慶、許傳凱、嚴邦平、方春、戴愛春、胡亞萍、彭溢群、蘇瑤廣、陳榮湘、陳淑定、陳克平、馬士永、陳家旭、王飛、于朝陽、胡輝、蘇光茂、蘇林峰、賴仁忠、毛通連、黃優春。
本標準所代替標準的歷次版本發布情況為：
——GB 25502—2010.
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坐便器水效限定值及水效等級
1 范圍
本標準規定了坐便器的水效限定值、節水評價值、水效等級和試驗方法。
本標準適用于安裝在建筑設施內冷水管路上，供水壓力不大于0.6MPa條件下使用的各類坐便器的水效評價。
2 規范性引用文件
下列文件對于本文件的應用是必不可少的。凡是注日期的引用文件，僅注日期的版本適用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改單）適用于本文件。
GB 6952 衛生陶瓷
3 術語和定義
GB 6952界定的以及下列術語和定義適用于本文件。
3.1
坐便器平均用水量 average water consumption of water closet
依據標準規定的試驗方法和計算公式進行實測和計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
在標準規定的測試條件下，坐便器在符合通用技術要求、沖洗功能要求、配套性技術要求的情況下，所允許的最大用水量。
注：單沖坐便器的用水量是指其平均用水量，雙沖坐便器的用水最包括平均用水量和金沖最大用水量。
3.3
坐便器節水評價值 evaluating values of water conservation for products
在標準規定的測試條件下，在符合通用技術要求、沖洗功能要求、配套性技術要求的情況下，節水型坐便器所允許的最大用水量。
注1：節水評價值是評價節水型坐便器的規定要求。
注2：單沖坐便器的用水量是指其平均用水量，雙沖坐便器的用水量包括平均用水量和全沖最大用水量。
4 技術要求
4.1 基本要求
在標準規定的測試條件下，衛生陶瓷坐便器應符合GB 6952規定的通用技術要求、功能要求、便器配套性技術要求，其他坐便器的沖洗功能要求、便器配套性技術要求應符合其依據的標準。水箱配件應符合相關標準的規定要求。
4.2 坐便器水效等級
4.2.1 坐便器的水效等級分為3級，其中3級水效最低。
4.2.2 各等級坐便器的用水量應符合表1的規定。
表1坐便器水效等級指標 單位為升
坐便器水效等級 1級 2級 3級
坐便器平均用水量 ≤4.0 ≤5.0 ≤6.4
雙沖坐便器全沖用水量 ≤5.0 ≤6.0 ≤8.0
注：每個水效等級中雙沖坐便器的半沖平均用水最不大于其全沖用水量最大限定值的70%。
4.3 坐便器水效限定值
水效等級3級中規定的坐便器用水量。
4.4 坐便器節水評價值
水效等級2級中規定的坐便器用水量。
5 計算和試驗方法
5.1 坐便器平均用水量計算
5.1.1 單沖坐便器平均用水量
單沖坐便器的平均用水量即為其實測用水量的算術平均值。
5.1.2 雙沖坐便器平均用水量
雙沖坐便器的平均用水量按式（1）計算：
………………………（1）
式中：
——雙沖坐便器的平均用水量，單位為升（L）；
——雙沖坐便器全沖用水量的算術平均值，單位為升（L）；
——雙沖坐便器半沖用水量的算術平均值，單位為升（L）。
5.2 坐便器試驗方法
依據GB 6952規定的試驗方法進行坐便器用水量的試驗。
