Your Frigidaire refrigerator delivers clean, great-tasting water every day but only when the right filter is installed and up to date. If you are looking at the part number EPTWFU01 or the PureSource Ultra II name and are not completely sure it is the correct replacement for your unit, this guide will walk you through exactly how to check compatibility before buying so you can order with confidence and avoid a costly mismatch.
Why Frigidaire Water Filter Part Numbers Can Be Confusing
Frigidaire produces multiple refrigerator generations across several series and different configurations use different water filter formats. Here is why buyers frequently run into confusion when searching for the right replacement:
- Frigidaire makes five different filter technologies — PurePour PWF-1, PureSource 2, PureSource 3, PureSource Ultra, and PureSource Ultra II — 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 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 and EWF02 appear in some listings alongside EPTWFU01, making it unclear which code is the primary one for your specific refrigerator
- Filters look physically similar across the Frigidaire lineup so ordering by appearance rather than part number is one of the most common and costly mistakes buyers make
Where to Find Your Frigidaire Refrigerator Filter Part Number Before Buying
-
Check the label on your current filter — the part number 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 part number 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
-
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 select Frigidaire refrigerator models from the latest generation. It uses activated carbon block filtration to reduce chlorine taste and odor, lead, heavy metals, VOCs, sediment, and select trace compounds before water reaches the dispenser or ice maker. The EPTWFU01 has a service life of 200 gallons or 6 months whichever comes first and uses a twist-in installation design that requires no tools. PureSource Ultra II is the technology name for this filter and both the EPTWFU01 part number and PureSource Ultra II name refer to the same replacement filter.
What Is the Frigidaire ULTRAWF PureSource Ultra Water Filter?
The Frigidaire ULTRAWF PureSource Ultra is an NSF 42 and 53 certified activated carbon block water filter designed for an earlier generation of Frigidaire refrigerator models. It carries the same service life of 200 gallons or 6 months as the EPTWFU01 and also uses a twist-in installation design, but it does not carry NSF 401 certification and uses a housing format that is not interchangeable with the EPTWFU01. If your refrigerator currently shows ULTRAWF on the existing filter label, the EPTWFU01 is not the correct replacement for your unit.
What Is the Frigidaire WF3CB PureSource 3 Water Filter?
The Frigidaire WF3CB PureSource 3 is another NSF 42 and 53 certified water filter in the Frigidaire lineup but covers a different range of compatible models with its own distinct housing format. Like the EPTWFU01 and ULTRAWF it is rated for 200 gallons or 6 months and uses a twist-in installation design, but the WF3CB housing tolerances are not compatible with the EPTWFU01 filter housing. Always confirm the part number on the existing filter rather than relying on installation type to determine which filter your refrigerator requires.
Is the EPTWFU01 the Same as the ULTRAWF or WF3CB?
No. This is one of the most common questions buyers ask when searching for a Frigidaire refrigerator water filter. While the EPTWFU01, ULTRAWF, and WF3CB all use activated carbon block filtration and share the same 200 gallon or 6 month service life, they are separate part numbers with different housing designs and different certification levels. The EPTWFU01 is the only filter in the Frigidaire lineup that carries NSF 401 certification in addition to NSF 42 and 53. Ordering the EPTWFU01 for a refrigerator that requires the ULTRAWF or WF3CB will result in a filter that either does not seat properly or leaves gaps at the housing connection that allow unfiltered water to bypass the filter entirely.
Compatibility Checklist Before You Buy the Frigidaire EPTWFU01
- Your current filter label shows EPTWFU01, PureSource Ultra II, 242069801, or EWF02 — any of these confirms the EPTWFU01 is the correct replacement
- Your refrigerator model is on the EPTWFU01 compatibility list — cross-check your model number before ordering
- Your refrigerator is a latest generation Frigidaire Gallery or Professional Series model — the EPTWFU01 covers select models in these series
- Your current filter uses a twist-in connection — the EPTWFU01 is twist-in only
- Your current filter does not show ULTRAWF or WF3CB — if it does those are the correct filters for your unit not the EPTWFU01
- It has been 6 months or 200 gallons since your last replacement — if yes it is time to order regardless of how the water currently tastes
Common Mistakes When Buying the Frigidaire EPTWFU01
- Confusing PureSource Ultra II with PureSource Ultra — they sound almost identical but cover different model generations and use different housings that are not interchangeable
- Ordering the ULTRAWF because it looks the same — physical appearance is not a reliable guide. The EPTWFU01 and ULTRAWF have different housing tolerances that prevent a proper seal when swapped
- Overlooking the NSF 401 certification difference — the EPTWFU01 is the only Frigidaire filter certified to reduce select trace compounds. If your refrigerator requires this filter, substituting a non-401 certified replacement reduces the coverage you are getting
- Searching "Frigidaire water filter" without the part number — returns results for multiple incompatible filters across the entire Frigidaire lineup
- Skipping the post-installation flush — always run 2 to 3 gallons through the dispenser after fitting a new EPTWFU01 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 EPTWFU01 Filter?
- 6 months or 200 gallons have passed — replace at whichever comes first
- 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 reduction life
- Water flow from the dispenser has slowed noticeably — a saturated or clogged filter restricts flow through the housing
- Ice cubes look cloudy or discolored — sediment the filter can no longer capture is affecting ice clarity
- The filter indicator light has activated — order a replacement promptly rather than waiting for additional taste or flow changes to confirm
Ready to Order the Frigidaire EPTWFU01 PureSource Ultra II Water Filter?
If your Frigidaire refrigerator uses the EPTWFU01 PureSource Ultra II water filter you can view the compatible replacement and confirm availability here. Ordering the correct filter and replacing on schedule ensures your refrigerator delivers consistently clean, great-tasting water with the broadest certified contaminant reduction available across the Frigidaire filter lineup.
Shop Frigidaire EPTWFU01 PureSource Ultra II Water Filter from purefridgewater.
FAQs
How do I know if my Frigidaire refrigerator needs the EPTWFU01 and not the ULTRAWF?
Check the part number on the existing filter currently installed in your refrigerator. If it shows EPTWFU01, PureSource Ultra II, 242069801, or EWF02, the EPTWFU01 is the confirmed replacement. If it shows ULTRAWF or PureSource Ultra, that is the correct filter for your unit instead.
What makes the EPTWFU01 different from every other Frigidaire water filter?
The EPTWFU01 is the only Frigidaire refrigerator water filter that carries NSF 401 certification in addition to NSF 42 and 53. NSF 401 covers select trace compounds not addressed by NSF 42 and 53 alone, making the EPTWFU01 the most comprehensive certified filtration option in the current Frigidaire water filter lineup.
Can I use the ULTRAWF instead of the EPTWFU01 to save money?
No. The ULTRAWF and EPTWFU01 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, which defeats the purpose of replacing it.
Do I need to turn off the water supply before replacing the EPTWFU01?
The twist-in housing on the EPTWFU01 is designed for a straightforward swap on most compatible Frigidaire models without requiring the water supply to be shut off. Some minor dripping at the housing during the swap is normal. Consult the Frigidaire user guide for your specific model if you are unsure.
Is 242069801 the same as the EPTWFU01?
Yes. 242069801 and EWF02 are alternative part numbers that refer to the same EPTWFU01 PureSource Ultra II filter. If your refrigerator currently shows either of those codes on the existing filter label, the EPTWFU01 is the correct replacement to order.
Where can I find more detail on how the EPTWFU01 compares to other Frigidaire water filters before I buy?
The Frigidaire EPTWFU01 landing page includes a full head to head comparison table covering the EPTWFU01 against the ULTRAWF and WF3CB side by side including certification levels, compatible model generations, and housing design differences to help you confirm the correct filter before ordering.