How to Find the Right Water Filter for Your Refrigerator?

Most refrigerator water filters need to be replaced every six months, which means most households go through two filters a year. The actual replacement takes about two minutes. Finding the correct filter beforehand is the part that trips people up -- and it is easier than it looks once you know the two reliable methods for identifying what your fridge actually needs.

Why Refrigerator Filters Need Regular Replacement

Refrigerator filters use activated carbon to capture chlorine, sediment, rust, and other contaminants as water passes through to the dispenser and ice maker. That carbon media has a finite capacity. Once it becomes saturated, filtration effectiveness drops and the filter can no longer reliably hold what it has already captured -- meaning previously trapped contaminants can leach back into the water supply. Most manufacturers rate their filters for 300 to 500 gallons or six months, whichever comes first. High-usage households and homes with elevated chlorine or sediment in the supply may reach that threshold earlier.

The signs that a filter is overdue -- slower dispenser flow, a change in taste or odor, cloudy ice -- are worth acting on rather than waiting for the indicator light if your fridge has one.

The Two Fastest Ways to Find Your Filter

Method 1 -- Read the part number off the existing cartridge. Pull the current filter from the fridge (the water shuts off automatically when it releases), and look for the part number printed on the label. Common numbers include MWF, EDR1RXD1, EDR4RXD1, DA29-00020B, LT700P, and WF2CB, among dozens of others. Enter that number directly into the DFS search bar and you will see compatible replacements immediately. This is the most reliable method because it confirms exactly what is installed.

Method 2 -- Use the Fridge Filter Finder. If the filter is already discarded or the label is unreadable, the DFS Fridge Filter Finder walks through a short series of questions about your refrigerator brand, style, and filter location to recommend the correct cartridge. Your refrigerator's model number -- typically on a sticker inside the door frame or behind the crisper drawer -- can also be entered directly into the search bar to pull up compatible options.

For a deeper walkthrough of filter identification, installation steps, and reset instructions by brand, the fridge filter buying guide covers all of this in one place.

Filter Location by Refrigerator Type

Knowing where the filter sits in your fridge helps confirm you are looking at the right type of replacement. The table below shows the most common configurations by refrigerator style.

OEM vs. Compatible Replacement Filters

When buying a replacement filter, you will see two categories: OEM filters made by the refrigerator manufacturer, and compatible aftermarket filters made to the same specifications by third-party brands.

OEM filters guarantee compatibility and carry the manufacturer's name, but they come at a premium. Compatible replacements from certified brands like Tier1 and Tier1 Plus deliver equivalent filtration performance at a lower price point. The key difference is not quality -- it is what certifications the filter carries and which contaminants it is tested to reduce.

Standard Tier1 filters are certified to NSF/ANSI 42 (chlorine taste and odor) and NSF/ANSI 372 (lead-free materials), making them direct OEM equivalents for everyday chlorine and sediment reduction. Tier1 Plus filters add NSF/ANSI 53 certification, which covers health-related contaminants including lead, mercury, cysts, and VOCs, and NSF/ANSI 401 for emerging contaminants like pharmaceuticals and microplastics. If your household has concerns beyond basic taste and odor, the Tier1 Plus upgrade is worth the small price difference.

The table below summarizes what each NSF certification level covers.

Filters by Brand at DFS

DFS stocks compatible replacements for every major refrigerator brand. The full refrigerator filters collection covers all brands and filter types in one place, and each brand also has its own dedicated collection for faster browsing.

For Whirlpool, Maytag, KitchenAid, Jenn-Air, and Amana refrigerators -- all of which now use the EveryDrop filter series -- the Whirlpool refrigerator filters collection includes both OEM EveryDrop cartridges and Tier1 compatibles across the EDR1 through EDR5 series. For GE and Hotpoint refrigerators, the GE refrigerator filters collection covers the MWF, RPWF, GSWF, and MSWF filter types. LG and LG-built Kenmore models use the LT600P, LT700P, or LT800P series, available in the LG refrigerator filters collection. Samsung filter replacements including the DA29-00020B and DA29-00003G are in the Samsung refrigerator filters collection. Frigidaire models using the WF2CB, WF3CB, or ULTRAWF are covered in the Frigidaire refrigerator filters collection. For households that prefer US-made filters, the USWF refrigerator filter collection features carbon block filters made domestically and rated to 0.5 microns.

Not sure which collection applies to your fridge? The Tier1 Plus refrigerator filters collection is a good starting point for households that want NSF 53 and NSF 401 certified performance across all major brands.

Questions about which filter fits your refrigerator? Call the DFS team at 1-800-277-3458.

Frequently Asked Questions

How do I find the right water filter for my refrigerator? The fastest method is to remove the existing filter and read the part number printed on the cartridge, then search that number at DFS. If the filter is unavailable, use the DFS Fridge Filter Finder to identify the correct replacement by brand and style, or enter your refrigerator's model number into the search bar directly.

What is the difference between OEM and compatible refrigerator filters? OEM filters are made by the refrigerator manufacturer. Compatible filters are made by third-party brands such as Tier1 to the same fit and performance specifications. The meaningful difference is in the NSF certifications each filter carries, not the filtration quality itself. Standard Tier1 filters are certified to NSF 42 and 372. Tier1 Plus adds NSF 53 and NSF 401 for broader contaminant coverage including lead, mercury, and pharmaceuticals.

What do NSF certifications mean for refrigerator filters? NSF/ANSI 42 covers chlorine taste and odor reduction and is the baseline for most fridge filters. NSF/ANSI 53 is required for filters that make lead or health-contaminant reduction claims and indicates independent testing has verified those results. NSF/ANSI 372 certifies that the filter's materials are lead-free. NSF/ANSI 401 covers emerging contaminants including pharmaceuticals and microplastics -- a premium tier not carried by all filters.

How often should I replace my refrigerator water filter? Every six months or 300 to 500 gallons, whichever comes first. Households with high water usage or elevated incoming sediment and chlorine levels may need to replace closer to the four-month mark. Reduced dispenser flow, a change in water taste or odor, and cloudy ice are all reliable signals the filter needs changing regardless of schedule.

Can I use a compatible filter without voiding my refrigerator warranty? In most cases, yes. U.S. law under the Magnuson-Moss Warranty Act generally prevents manufacturers from voiding a warranty solely because a compatible replacement part was used, provided the replacement performs to the same specifications. Using a certified NSF-tested compatible filter is the appropriate standard to meet.

What happens if I do not replace my refrigerator water filter on time? An overdue filter loses its ability to capture contaminants and can begin to release previously trapped particles back into the water. Flow rate typically drops as the filter becomes clogged, and ice quality and water taste are usually the first noticeable signs of a saturated cartridge. Replacing on schedule prevents both issues.

Do refrigerator filters remove lead? Standard NSF 42 filters do not remove lead. A filter certified to NSF/ANSI 53 is required for verified lead reduction. If lead is a concern in your household water supply, look for a Tier1 Plus or other NSF 53 certified filter for your refrigerator model.

What if my refrigerator filter model has been discontinued? Discontinued OEM filters often have direct compatible replacements available that fit the same housing. The DFS Fridge Filter Finder and search bar both handle discontinued model numbers and will surface currently available compatible options.