NSF/ANSI 61 O-Rings (Potable Water)

When an O-Ring seals a component that touches drinking water, the material has to be safe for people, not just fit for the pressure. In North America, the standard that governs this is NSF/ANSI 61. The O-Ring Store stocks compounds formulated to meet it.

What NSF/ANSI 61 certifies

NSF/ANSI 61 is the health-effects standard for products and materials that contact drinking water. It evaluates whether a material leaches contaminants into potable water above levels considered safe for human health. Certification means the material is judged safe for use in drinking-water system components such as valves, meters, pumps, and fittings. The standard addresses health effects, not sealing performance, so an NSF-61 grade still has to be matched to the pressure, temperature, and chemistry of the application.

O-Ring compounds that meet it

NSF-61 compliant O-Rings are typically made from a small set of base elastomers, in peroxide-cured or specifically approved grades:

• EPDM, a common choice for hot and cold potable water
• Nitrile (NBR), in approved drinking-water grades

How The O-Ring Store supports it

As a distributor, we supply NSF-61 compounds ready to ship, including EPDM FDA/NSF-61 and nitrile 70 FDA/NSF61 grades. Tell us your fluid, temperature, and size, and we will confirm the right potable-water compound for your part before you buy.

Need NSF/ANSI 61 O-Rings for a drinking-water system? Contact us with your requirement and we will match the compound to your application.