NSF/ANSI/CAN 372 Technical Requirements
December 7, 2025
Minimizing lead content in drinking water system components.
NSF/ANSI/CAN 372: Drinking Water System Components – Lead Content is an American National Standard that provides a standardized methodology for determining and verifying product compliance to minimize lead contamination.
What the standard covers
NSF/ANSI/CAN 372 addresses lead content only. Most regulations also require compliance with an extraction or leaching test standard, such as:
- NSF/ANSI/CAN 61 for most products
- NSF/ANSI/CAN 42, 44, 53, 55, 58, or 62 for point-of-use and point-of-entry water treatment products.
Key technical requirements
- Maximum weighted lead content:
- 0.25% for most components
- 0.2% for solders and fluxes
- Weighted average formula for calculating lead content prior to testing
- Specific testing procedures for verifying compliance.
Products covered under NSF/ANSI/CAN 372
Multiple products that come into contact with drinking water can be tested to this standard, including:
- Coatings
- Valves
- Pipes
- Gaskets
- Solder and flux fittings
- Faucets
- Water filters
- Water softeners
- Reverse osmosis systems
- Ultraviolet reactors
- Water meters.
Ensure your products meet lead content requirements and protect public health.
How NSF Can Help You
Get in touch to find out how we can help you and your business thrive.
What’s New with NSF
NSF Hosts First External Review Panel for ‘NSF/KWTC 555’ with Key Asian Water Authorities
August 3, 2026Joint standard development gains momentum to enhance confidence in Asia’s water industry and advance drinking water safety.
NSF Achieves European Accreditation for Drinking Water Product Certification Ahead of 2027 EU Deadline
July 22, 2026The ISO/IEC 17065 accreditation from BELAC complements NSF’s testing capacity, enabling end-to-end support for EU Drinking Water Directive (DWD) readiness ahead of the January 2027 deadline.
Meet NSF at Fruit Attraction
July 15, 2026NSF is excited to be exhibiting at Fruit Attraction, a leading international trade fair for the fruit and vegetable sector.
NSF Awards World-First Community Catch Certification to Orkney Crab Fishery
July 13, 2026Milestone certification sets a new benchmark for small-scale fishery sustainability and social responsibility.