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NSF International is the globally recognized organization responsible for developing and enforcing health-based standards for drinking water system components. Through independent laboratory testing and certification, NSF Standards verify that materials used in potable water equipment do not introduce harmful contaminants into finished water. Our WS Series and WT Series submersible well pumps along with many of our Industrial line pumps  have earned NSF/ANSI 61 and NSF/ANSI 372 certifications, confirming that their wetted materials meet established requirements for chemical safety and lead content in drinking water applications.

 

In potable water systems, hydraulic performance alone is not enough. The materials that contact drinking water directly influence long-term water quality, and even high-performing equipment can pose risks if those materials allow contaminants to leach. Third-party certification has therefore become a baseline requirement for engineers, municipalities, and regulators.

 

NSF/ANSI 61 Standards establish health effects criteria for chemical contaminants that may migrate from components into drinking water. Products undergo extraction testing to ensure any leached substances remain below allowable limits. The standard applies to coatings, liners, sealing materials, pipes, fittings, valves, treatment devices, and mechanical plumbing components, and focuses strictly on chemical safety rather than performance, taste, odor, or microbial growth.

 

NSF/ANSI 372 complements these requirements by limiting the weighted average lead content of wetted materials. While NSF/ANSI 61 controls what can leach into the water, NSF/ANSI 372 controls how much lead may be present in the product itself. Used together, these standards address both lead presence and lead migration. The combined NSF/ANSI/CAN 61 and 372 standards apply the same criteria across North American markets, supporting consistent regulatory compliance.

 

For specifying engineers and contractors, an NSF Standard certification simplifies approval and documentation while reducing compliance risk. For end users, the NSF mark signals that equipment has been independently evaluated for potable water safety. By combining certified materials with proven field reliability, our WS and WT Series pumps support both system performance and long-term water quality in demanding drinking water service.

Additional information is available at https://www.nsf.org/water-systems