Tool
Filter Finder
Pick a brand family, then a cartridge code, and read the three-cell chip for what that code's genuine listing actually names. Of nine codes, 5 have a genuine listing naming no standard number at all, and 2 have an aftermarket listing here to set against it.
Step one, the refrigerator brand family
Pick a brand family to begin
The finder reads what each listing names and nothing else. It fills a certification cell only where a listing writes down a standard number.
How to check your own
- Pull the cartridge currently in the refrigerator and read the code molded or printed on its body, not the code on the box it came in.
- Find the same code in the refrigerator documentation, which lists the cartridge the appliance was designed for.
- Compare that code against the code on the listing you are about to buy, character for character, including any suffix.
- If a listing states it replaces your code, treat that as the seller's statement about their own product and check it against your documentation rather than instead of it.
- Keep the old cartridge until the new one is installed and running, so there is something to compare against if the fit is wrong.
What this tool will not do
It will not guess a code
Choose the option that says you do not know and it stops and shows you how to find the code instead. A brand does not imply a cartridge, and guessing one is how people buy the wrong filter twice.
It will not promote a standard
A listing naming NSF/ANSI 42 fills one cell. It never fills the other two, however similar the cartridge looks to one that holds all three.
It will not rank filters
There is no better and worse here, because these listings carry no comparable test data. There is only what each one has written down.
The companion tool is Filter Life Check, which turns a stated gallon rating into months. The full index of cartridge codes is Fits.