Frigidaire produces refrigerators across multiple series and generations and the water filter your unit requires depends entirely on the model you own. If you are looking at filter codes like EPTWFU01, ULTRAWF, WF3CB, WF2CB, or FPPWFU01 and are not completely sure which one applies to your refrigerator, this guide will walk you through exactly how to identify the correct replacement before buying so you can order with confidence and avoid a costly mismatch.
Why Frigidaire Water Filter Codes Can Be Confusing
Frigidaire has produced refrigerators across a wide range of series and generations and different configurations use different filter codes and housing designs. Here is why buyers frequently run into confusion:
- Five different Frigidaire filter technologies exist covering PureSource Ultra II, PureSource Ultra, PureSource 3, PureSource 2, and PurePour PWF-1 and each fits a different set of models with a different housing design
- PureSource Ultra and PureSource Ultra II sound nearly identical making it easy to order the ULTRAWF when your refrigerator actually requires the EPTWFU01 or the other way around
- The WF2CB uses a push-button eject design while all other Frigidaire water filters use twist-in designs, and buyers who do not check the installation type often order the wrong filter entirely
- The EPTWFU01 carries NSF 401 certification in addition to NSF 42 and 53 which sets it apart from every other filter in the Frigidaire lineup but is easy to overlook when comparing listings
- Alternative part numbers like 242069801, 218904501, and 242294402 appear in listings alongside primary filter codes making it unclear which code is the primary one for a specific refrigerator model
- Some listings bundle multiple Frigidaire filter codes together making it difficult to determine which code actually applies to your specific unit
Where to Find Your Frigidaire Refrigerator Filter Code Before Buying
- Check the label on your current filter — the part number or technology name is printed directly on it. This is the fastest and most reliable confirmation
- Look inside the filter housing slot — some Frigidaire models stamp the required filter code on a label inside the housing slot itself
- Find the model plate inside the fridge — typically located along the upper door frame or side wall of the fresh food compartment. Use the model number to cross-reference the correct filter code
- Check your user guide — the maintenance section lists the exact replacement filter code for your specific Frigidaire model
- Search by model number on the retailer page — if the label is worn or unreadable this is the quickest way to confirm the right filter before you buy
What Is the Frigidaire EPTWFU01 PureSource Ultra II Water Filter?
The Frigidaire EPTWFU01 is an NSF 42, 53, and 401 certified replacement water filter designed for the latest generation of compatible Frigidaire refrigerator models. It uses activated carbon block filtration to reduce chlorine taste and odor, lead, heavy metals, VOCs, and select trace compounds before water reaches the dispenser or ice maker. The EPTWFU01 is the only filter in the Frigidaire lineup that carries NSF 401 certification and uses a twist-in installation design with a service life of 200 gallons or 6 months whichever comes first.
What Is the Frigidaire ULTRAWF PureSource Ultra Water Filter?
The Frigidaire ULTRAWF is an NSF 42 and 53 certified activated carbon block replacement water filter designed for an earlier generation of compatible Frigidaire refrigerator models. It carries the same service life as the EPTWFU01 and also uses a twist-in design but does not carry NSF 401 certification and uses a housing format that is not interchangeable with the EPTWFU01. Alternative part numbers 242294402 and 241791601 refer to the same ULTRAWF filter format.
What Is the Frigidaire WF3CB PureSource 3 Water Filter?
The Frigidaire WF3CB is an NSF 42 and 53 certified activated carbon block water filter covering a different range of compatible Frigidaire refrigerator models. Like the EPTWFU01 and ULTRAWF it uses a twist-in installation design and has a service life of 200 gallons or 6 months, but its housing tolerances are specific to WF3CB compatible models and are not interchangeable with any other Frigidaire filter code. Alternative part numbers 242069601 and 3762897 refer to the same WF3CB filter format.
What Is the Frigidaire WF2CB PureSource 2 Water Filter?
The Frigidaire WF2CB is an NSF 42 and 53 certified activated carbon block water filter and the only filter in the Frigidaire lineup that uses a push-button eject installation design rather than a twist-in design. This is the single most important distinction to understand before ordering a WF2CB replacement. A twist-in filter ordered for a WF2CB housing will not install correctly regardless of physical similarities. Alternative part numbers 218904501, 218732309, and FC-100 refer to the same WF2CB filter format.
What Is the Frigidaire FPPWFU01 PurePour PWF-1 Water Filter?
The Frigidaire FPPWFU01 is an NSF 42 and 53 certified activated carbon block replacement water filter designed for select Frigidaire refrigerator models requiring the PurePour PWF-1 filter format. It uses a twist-in installation design and has the same service life of 200 gallons or 6 months as all other Frigidaire water filters in this collection. PWF-1 is the technology name and FPPWFU01 is the part number and both refer to the same replacement filter.
Is the ULTRAWF the Same as the EPTWFU01?
No. This is one of the most common questions buyers ask when searching for a Frigidaire refrigerator water filter. While PureSource Ultra and PureSource Ultra II sound nearly identical and both use twist-in designs with the same service life, the ULTRAWF and EPTWFU01 are separate part numbers with different housing designs and different certification levels. The EPTWFU01 carries NSF 401 certification while the ULTRAWF does not. Ordering the ULTRAWF for a refrigerator that requires the EPTWFU01 means you are getting a filter with a lower certification coverage than your refrigerator was designed for.
Compatibility Checklist Before You Buy a Frigidaire Water Filter
- Your current filter shows EPTWFU01, PureSource Ultra II, 242069801, or EWF02 — the EPTWFU01 is the confirmed replacement
- Your current filter shows ULTRAWF, PureSource Ultra, 242294402, or 241791601 — the ULTRAWF is the confirmed replacement
- Your current filter shows WF3CB, PureSource 3, 242069601, or 3762897 — the WF3CB is the confirmed replacement
- Your current filter shows WF2CB, PureSource 2, 218904501, or FC-100 — the WF2CB is the confirmed replacement and uses a push-button eject design
- Your current filter shows FPPWFU01 or PWF-1 — the FPPWFU01 is the confirmed replacement
- It has been 6 months or 200 gallons since your last replacement — if yes it is time to order regardless of water taste or flow
Common Mistakes When Buying a Frigidaire Refrigerator Water Filter
- Confusing PureSource Ultra with PureSource Ultra II — they sound almost identical but cover different model generations with different housing designs and different certification levels
- Ordering a twist-in filter for a WF2CB push-button eject housing — the WF2CB is the only Frigidaire filter that uses a push-button eject design. Ordering any other Frigidaire filter code for a WF2CB housing will not work
- Searching by technology name without the part number — technology names alone can return results for multiple filter codes. Always confirm the part number before ordering
- Overlooking the NSF 401 certification difference on the EPTWFU01 — if your refrigerator requires the EPTWFU01 and you substitute an ULTRAWF, you are losing NSF 401 coverage that your refrigerator was designed to work with
- Skipping the post-installation flush — always run 2 to 3 gallons through the dispenser after installing a new filter to clear carbon fines before drinking
- Forgetting to reset the filter indicator — an unreset indicator will trigger a false early replacement reminder even when the new filter is performing correctly
When Should You Order a Replacement Frigidaire Water Filter?
- 6 months have passed since the last replacement — the primary trigger for all Frigidaire water filters regardless of gallon count
- 200 gallons have passed — replace at this threshold if your household reaches it before the 6 month mark
- Water tastes flat or slightly chemical — the carbon block is no longer reducing chlorine and contaminants at full capacity
- Ice has a chlorine or off taste — a reliable sign the filter is past its effective odor and contaminant reduction life
- Water flow from the dispenser has slowed noticeably — a saturated filter restricts flow through the housing
- The filter indicator light has activated — order a replacement promptly rather than waiting for additional signs of reduced performance
Ready to Shop Frigidaire Refrigerator Water Filters?
If you have confirmed the correct filter code for your Frigidaire refrigerator you can view the compatible replacement and order here. Replacing on schedule ensures your refrigerator delivers consistently clean, great-tasting water and ice through every cycle.
Shop Frigidaire Water Filter from purefridgewater.
FAQs
How do I know which Frigidaire water filter fits my refrigerator?
Check the part number or technology name on the existing installed filter. That code is the most reliable confirmation. If unreadable, find the model number inside the fresh food compartment and cross-reference it against the compatibility list for each filter before ordering.
What is the key difference between the WF2CB and all other Frigidaire water filters?
The WF2CB is the only Frigidaire water filter that uses a push-button eject installation design. All other Frigidaire water filters use twist-in designs. This makes the WF2CB immediately incompatible with any other Frigidaire filter housing regardless of physical appearance.
Why does the EPTWFU01 cost more than other Frigidaire water filters?
The EPTWFU01 carries NSF 401 certification in addition to NSF 42 and 53, covering select emerging trace compounds that other Frigidaire filters do not address. The additional certification reflects a higher level of independently verified contaminant reduction.
Can I use the ULTRAWF in my refrigerator if it currently has an EPTWFU01 installed?
No. The two filters have different housing designs and are not interchangeable. Fitting the wrong filter risks an improper seal at the housing connection that allows unfiltered water to bypass the filter entirely.
Are all the alternative part numbers like 242294402 and 218904501 the same as the primary filter codes?
Yes. These are alternative part numbers that refer to the same filters. 242294402 and 241791601 refer to the ULTRAWF, 218904501 and FC-100 refer to the WF2CB, and 242069601 refers to the WF3CB. If your existing filter shows any of these codes, use the primary filter code listed here to find and order the correct replacement.
Where can I find more detail on each Frigidaire water filter before deciding which to buy?
Each filter has its own dedicated landing page on PureFridgeWater covering full specifications, compatible models, installation steps, and a head to head comparison with related filters to help you confirm the correct replacement before ordering.