Overview
SIST EN 15664-1:2026 sets out a method for assessing the release of metals from metallic materials used in products that come into contact with drinking water. Developed by the Slovenian Institute for Standardization (SIST) and aligned with European standards, this document defines a dynamic rig test approach, focusing on the design and operation of test setups. Its primary objective is to ensure that materials employed in water supply systems do not compromise water quality through excessive metal release, addressing public health and regulatory requirements within the EU.
The dynamic test described in this standard simulates typical conditions in domestic water systems by alternating between periods of flow and stagnation. This approach models real-world exposure scenarios for pipes, fixtures, and other metallic components, providing a reliable assessment of material suitability.
Key Topics
- Metal Release Testing: The standard outlines rigorous procedures to quantify the amount of metal leached from materials, such as pipes or fittings, when in contact with drinking water.
- Test Rig Design and Operation: Detailed requirements are provided for constructing and operating a test rig, including the configuration of control and test lines, temperature and flow conditions, and the use of both reference and local water sources.
- Sampling and Analysis: Sampling schedules, fractional sampling techniques, and analytical methods are specified to ensure reliable measurement of metal concentrations in water after defined stagnation and operation periods.
- Material Assessment Purposes: The test can be used to:
- Evaluate reference materials for new material categories,
- Approve materials under existing categories based on metal release in worst-case water compositions,
- Generate data on the interaction of specific local water supplies with candidate materials.
- Documentation and Reporting: Guidance is provided on reporting procedures, including the detailed recording of test conditions, deviations, and analytical results.
Applications
SIST EN 15664-1:2026 finds practical value in several key areas:
- Material Approval and Certification: Manufacturers and suppliers of metallic pipes, fittings, and components use this standard to demonstrate compliance with drinking water safety regulations.
- Regulatory Compliance: Water utilities, regulators, and certification bodies rely on the test to assess and approve the use of metallic materials in municipal and domestic water distribution networks.
- R&D and Quality Assurance: Product developers employ these procedures to compare new alloys and finishes for improved corrosion resistance and reduced metal leaching.
- Risk Assessment in Water Supply: The standard supports risk-based screening of materials in varying water chemistries, particularly helpful for local authorities managing water quality in different regions.
Related Standards
Organizations implementing SIST EN 15664-1:2026 should be aware of the following related standards:
- SIST EN 15664-2: Focuses on test water composition used in metal release assessments.
- EN 12502-1: Provides guidance on the assessment of corrosion likelihood in water distribution and storage systems.
- EN 10088-1: Specifies the properties of stainless steels often used in control lines for testing.
- EN ISO 8044: Defines terminology related to corrosion of metals and alloys.
- EN ISO 11885 and EN ISO 15586: Outlines analytical methods for determining metal concentrations in water.
Summary
By implementing SIST EN 15664-1:2026, professionals ensure a scientifically robust and harmonized approach to evaluating the influence of metallic materials on drinking water. This helps protect public health, facilitates regulatory acceptance across Europe, and promotes innovation in materials used for water system infrastructure. For anyone involved in specifying, producing, or regulating materials for drinking water applications, adherence to this standard is essential for safeguarding water quality and consumer trust.