The Role of NSF 61 Certified Packing and Gaskets in Water Systems
As demand for safe and reliable drinking water continues to grow, the materials used in municipal and industrial water systems are receiving increased regulatory and public scrutiny. Beyond maintaining system performance, utilities, municipalities, and original equipment manufacturers must ensure compliance with health based regulations designed to protect water quality. Among the most critical components in these systems are compression packing and gaskets, which prevent leaks in pumps, valves, and piping.
Why NSF 61 Certification Matters
NSF ANSI CAN 61 establishes health effects requirements for materials and components that come into contact with drinking water. Its primary purpose is to ensure that system components do not introduce harmful contaminants into potable water supplies. Nearly all U.S. states and Canadian provinces require compliance with this standard, making certification essential for regulatory acceptance and public health protection.
For sealing products, NSF 61 certification confirms that packing and gaskets meet strict limits for contaminants that could leach into drinking water. While the standard applies to many types of components, sealing materials play a unique role because of their direct exposure to water and their importance in maintaining system integrity.
The NSF 61 Certification Process
Achieving NSF 61 certification requires a rigorous, multi step evaluation process. Products first undergo a detailed review of material composition, performance claims, and regulatory compliance. This is followed by laboratory testing in accredited facilities to measure potential contaminant extraction under controlled conditions.
Manufacturing facilities may also be inspected to verify that production processes meet sanitary and compliance requirements. Certification is not permanent. Annual retesting and facility audits are required to maintain approval, and unannounced inspections may be conducted to confirm ongoing compliance. These measures help ensure consistent product quality and long term protection of water systems.
Sealing Challenges in Potable Water Applications
Packing and gaskets are essential to preventing leakage in water infrastructure. When sealing systems fail, the consequences can be significant. Water loss from leaking equipment can amount to millions of gallons annually, increasing operational costs and reducing system efficiency. Infrastructure damage caused by persistent leaks can lead to corrosion, equipment failure, and costly repairs.
More critically, leaks can pose public health risks by allowing contaminants to enter the water supply. For this reason, selecting appropriate sealing materials is not solely a performance decision but also a public safety responsibility. Application specific factors such as pressure, temperature, chemical compatibility, and installation practices must be carefully evaluated in consultation with sealing manufacturers.
Evolving Regulatory Requirements
NSF 61 is widely adopted across North America and referenced internationally. The standard defines allowable limits for a wide range of contaminants, including metals, organic compounds, radionuclides, solvents, and residual monomers associated with plastic materials.
Recent updates to the standard have expanded testing requirements to include specific nonpolymeric per and polyfluoroalkyl substances. These changes affect components made from fluoropolymers, elastomers, plastics, and lubricants. Several of these compounds are regulated by the Environmental Protection Agency, with additional compliance thresholds scheduled to take effect in 2028.
As these regulations evolve, utilities and equipment manufacturers must consider not only the mechanical performance of sealing materials but also their chemical composition and long term impact on water quality.
Best Practices for Compliance and Risk Reduction
Maintaining compliance with NSF 61 requires ongoing attention to regulatory developments and material selection practices. Organizations should stay informed on updates to standards, review internal alignment with regulatory requirements, and engage with experts to assess potential risks.
Selecting NSF 61 certified packing and gaskets helps reduce uncertainty, supports regulatory compliance, and demonstrates a commitment to public health. When combined with proper system design and installation, certified sealing materials play a vital role in safeguarding drinking water infrastructure.
Conclusion
NSF 61 certified packing and gaskets are essential components in modern water management systems. They protect public health by limiting contaminant exposure, support regulatory compliance across jurisdictions, and help maintain reliable system performance. As water quality regulations continue to evolve, proactive material selection and ongoing compliance efforts will remain critical to ensuring safe, clean drinking water for communities now and in the future.
This blog is based on the Sealing Sense Article “The Role of NSF 61-Certified Packing & Gaskets”. Click here to read the entire article.