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Refrigerator water filter — check the box for NSF/ANSI marks before you buy

Fridge filter

Buying a replacement refrigerator water filter? Match your model number, then look for NSF/ANSI marks on the box and confirm them on the maker's site.

Illustration of a refrigerator water filter box with a check mark beside a filter cartridge
Photo: CoraCo Studio™ original (generated)

Two filters can both say they fit your fridge. A refrigerator water filter box that lists NSF/ANSI standards tells you which claims the maker has tested, such as taste and odor.

Check NSF/ANSI marks on a replacement fridge filter

  1. Find your exact filter model number first, using the label on the old filter or your fridge manual.
  2. On the replacement box, look for NSF/ANSI standard numbers and the claims they cover. Taste and odor claims are not the same as contaminant claims.
  3. Confirm the claim on the maker’s own site or the certifier’s public listing instead of trusting a logo alone.
  4. Photo the box so you remember which model worked.

If a new filter already left your water tasting like plastic or chemicals, see fridge water tastes bad after a filter change before you buy another.

A mark on a box is a starting point, not a promise. If the numbers do not match your model, keep looking.

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