GB17051-2025
Hygienic specification for facilities of secondary water supply
二次供水设施卫生规范
GB 17051-2025 is a current mandatory Chinese national standard for Hygienic specification for facilities of secondary water supply. It appears in the Food compliance cluster with a product safety focus and has an implementation date of Jun 1, 2026.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to secondary water supply facilities for domestic drinking water, encompassing storage, pressurization, disinfection, and pipeline systems. It is mandatory for all facilities that re-store, pressurize, or disinfect centralized water supply before it reaches users. It specifically covers equipment like water tanks (pools) and non-negative pressure water supply equipment.
Technical requirements
GB 17051-2025 establishes comprehensive hygienic requirements across several critical areas. Firstly, it mandates that facilities must be independently housed in a locked machine room equipped with pest control, mechanical ventilation, and anti-flooding systems. Supply pipes must not directly connect to non-drinking water systems. Secondly, the standard details strict specifications for water tanks (pools). This includes design volume limits, structural requirements for manholes and vent pipes, and mandatory air gaps to prevent backflow. Tanks must be cleaned and disinfected at least once annually. Thirdly, it outlines requirements for disinfection equipment. Except for specific systems like non-negative pressure equipment, facilities must install appropriate disinfection devices such as UV, chlorine dioxide, or ozone systems, which must meet respective national standards. UV disinfectors, for example, must maintain a minimum effective dose at peak flow. Finally, the standard defines operating requirements for the management entity. This includes personnel health checks, emergency response planning, and strict water quality monitoring protocols for both routine testing and special circumstances.
Testing methods
The standard requires regular water quality testing of the facility's output, at least annually, during normal operation. It classifies testing indicators into mandatory indicators (including total coliforms, turbidity, and specific disinfection by-products) and supplementary indicators triggered by events like initial use, maintenance, or contamination recovery. Testing methods must strictly follow the GB/T 5750 series for sample collection, preservation, and analysis. Results must comply with the limits set in GB 5749-2022.
FAQs
What products and facilities are regulated under GB 17051-2025?
This standard regulates secondary water supply facilities for domestic drinking water, encompassing storage tanks, pressurization equipment, and disinfection systems used in residential or commercial buildings.
Are there any major updates from the previous GB 17051-1997 version?
The 2025 version introduces updated terminology, restructured chapters focusing on machine rooms, water tanks, and disinfection equipment, and adds specific requirements for different disinfection devices and special water quality testing scenarios. It also updates several indicator names to align with current testing standards.
Does GB 17051-2025 reference other international or national standards?
Yes, it references several national standards for equipment and testing, including GB 5749-2022 for drinking water quality limits, GB/T 5750 for standard examination methods, and specific GB standards for various disinfection equipment like UV, ozone, and chlorine dioxide generators.
The summary above provides a high-level overview of GB 17051-2025. To ensure complete compliance for your secondary water supply facilities entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 17051-2025 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Health and hygiene
- CCS
- C51
- ICS
- 13.060.20
- Competent department
- National Disease Control and Prevention Administration
- Technical committee
- National Disease Control and Prevention Administration
Relationships
Replaces:GB 17051-1997