FAQ on the Safety of PEX Plumbing Products
January 20, 2017
PEX (cross-linked polyethylene) has become one of the most widely used piping products for hot- and cold-water distribution in buildings.
All principal plumbing codes in North America require compliance of all potable water piping products (including PEX tubing and fittings) with NSF/ANSI/CAN 61: Drinking Water System Components - Health Effects.
NSF/ANSI/CAN 61 requires the identification of all chemicals that could potentially be extracted (or leached) into drinking water from a product. Tests are run to determine extraction amounts, if any. Virtually every material extracts some level of contaminants into drinking water – the question is whether that level of contaminant is safe for human consumption.
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 Launches Independent Certification Standard for Compact Products
August 25, 2026New third-party certification verifies products cutting materials and shipping impacts while maintaining safety and performance.
CELSIUS® Products Earn NSF Certified for Sport® Certification
August 20, 2026CELSIUS® has earned NSF Certified for Sport® certification for select products, including the CELSIUS VIBES line, reinforcing the brand’s commitment to quality, transparency and consumer trust.
Thomas Vyles Honored With 2026 Walter F. Snyder Environmental Health Award
August 19, 2026The award honors Walter F. Snyder, co-founder and first executive director of NSF, and pioneers whose work advances environmental and public health.
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.