NSF/ANSI/CAN 372 Technical Requirements

NSF/ANSI/CAN 372: Drinking Water System Components – Lead Content is an American National Standard that provides a standardised methodology for determining and verifying product compliance to minimise 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.