Frigidaire EPTWFU01 PureSource Ultra II Water Filter: Which Fridges Use It and Is It the Right One for Yours?

TheΒ Frigidaire EPTWFU01 PureSource Ultra II water filter is one of the most widely searched refrigerator filter replacements in the Frigidaire lineup. It fits a large range of French door and side-by-side models produced after 2015, carries NSF 42, 53, and 401 certifications, and uses a push-and-twist installation that takes under two minutes. Despite how widely available it is, it still causes confusion at ordering time. The EPTWFU01 looks similar to the ULTRAWF, carries a name that sounds nearly identical to the FPPWFU01 PWF-1, and is sometimes confused with the Electrolux EWF02 counterpart. This post covers what the EPTWFU01 actually is, how the PureSource Ultra II filtration system works, which refrigerators it fits, the difference between the EPTWFU01 and ULTRAWF, and the most common mistakes buyers make when ordering.

Why the EPTWFU01 Causes Confusion at Ordering Time

Three things create most of the confusion around the Frigidaire EPTWFU01 PureSource Ultra II filter.

First, the naming overlap. Frigidaire's filtration system names -- PureSource, PureSource Ultra, PureSource Ultra II, and PurePour -- are similar enough to confuse buyers who search by system name rather than part number. The EPTWFU01 is the PureSource Ultra II filter. The ULTRAWF is the PureSource Ultra filter. The FPPWFU01 is the PurePour filter. None are interchangeable despite sharing similar marketing names.

Second, the Electrolux crossover. The EPTWFU01 filter is also known as the Electrolux EWF02 -- the same filter sold under Electrolux branding for compatible Electrolux refrigerators. Buyers with Electrolux refrigerators sometimes search by brand and miss the EPTWFU01 listing entirely, or vice versa.

Third, the aftermarket landscape. More aftermarket alternatives exist for the EPTWFU01 than almost any other Frigidaire filter code. The OEM EPTWFU01 filter carries NSF 42, 53, and 401 certifications. Aftermarket versions certified only to NSF 42 focus on improving taste and odor by reducing chlorine but do not make claims for contaminant reduction beyond that. Understanding the certification difference before choosing between OEM and aftermarket replacements matters more for this filter than most.

Where to Find the EPTWFU01 Part Number Before Ordering

Confirming the correct filter code before ordering takes under two minutes. Here is where to look:

Step 1. Open the refrigerator and locate the water filter housing. The EPTWFU01 filter installs in the upper right-hand corner of the refrigerator. The filter housing is in this position on all compatible models.

Step 2. Check the label on the current filter. The part number -- EPTWFU01, ULTRAWF, FPPWFU01, WF3CB, or another code -- is printed directly on the filter body.

Step 3. Check the installation style. The EPTWFU01 uses a push-and-twist installation with a horizontal grip orientation. Remove the old EPTWFU01 filter by turning 90 degrees counterclockwise and pulling towards you. If the current filter uses a ceiling-mount push-to-lock design, it is likely the ULTRAWF rather than the EPTWFU01.

Step 4. If the label has worn off, check the refrigerator model number on the door sticker and cross-reference against the Frigidaire EPTWFU01 compatible models list. The EPTWFU01 fits French door and side-by-side refrigerators by Frigidaire and Electrolux produced after 2015.

Step 5. Check the packaging color. Frigidaire updated packaging to a berry-colored design with a Genuine Filters seal. If the current filter packaging is blue, it is the older packaging format for the same filter.

What Is the Frigidaire EPTWFU01 PureSource Ultra II Water Filter

The EPTWFU01 PureSource Ultra II is the water filter for Frigidaire and Electrolux French door and side-by-side refrigerators produced after 2015 using the PureSource Ultra II system. It uses activated carbon block technology with a 0.5 micron rating to capture contaminants in the water supply before they reach the dispenser or ice maker.

Key specifications confirmed through NSF testing and Frigidaire documentation:

  • Certification: NSF 42, 53, and 401, WQA/ASPE/ANSI S 803 for sustainability
  • Contaminants reduced: Chlorine taste and odor, lead, mercury, cysts, asbestos, pesticides, insecticides, BPA, and select trace compounds
  • Capacity: 200 gallons or 6 months, whichever comes first
  • Installation type: Push-and-twist, upper right corner, tool-free
  • Also known as: EPTWFU01B, EPTWFU01C, EWF02 (Electrolux equivalent), 5304456858, PS11722126, 012505454226

The EPTWFU01 uses advanced carbon block technology to remove impurities from water. The specialized activated carbon media contains millions of tiny pores which capture and hold organic particles and chemicals, resulting in clean-tasting and smelling water and ice.

What Is the Frigidaire ULTRAWF PureSource Ultra Filter

The ULTRAWF is the PureSource Ultra water filter for an earlier generation of Frigidaire Gallery and Professional models. It uses a ceiling-mount push-to-lock housing rather than the upper right corner push-and-twist design of the EPTWFU01. Both carry NSF 42, 53, and 401 certifications and are rated for 200 gallons or 6 months. The physical filter body and installation method are different.

The ULTRAWF and EPTWFU01 are not interchangeable. The ceiling-mount housing used by the ULTRAWF will not accept the EPTWFU01 cartridge, and vice versa.

What Is the Frigidaire FPPWFU01 PurePour PWF-1 Filter

The FPPWFU01 is the PurePour water filter for Frigidaire Gallery, Frigidaire Professional, and select Electrolux models using the PurePour filtration system. It uses a push-to-lock alignment arrow installation rather than the push-and-twist design of the EPTWFU01. It is rated for 125 gallons or 6 months -- a lower gallon capacity than the EPTWFU01's 200 gallon rating.

The FPPWFU01 vs EPTWFU01 difference is the filtration system and installation design. The FPPWFU01 fits the PurePour system. The EPTWFU01 fits the PureSource Ultra II system. They look similar in product photos but use different housing designs that are not interchangeable.

Is the EPTWFU01 the Same as the EWF02

Yes and no. The EPTWFU01 is also known as the Electrolux EWF02 -- the same filter sold under Electrolux branding for compatible Electrolux refrigerators. If the refrigerator is an Electrolux French door or side-by-side model produced after 2015 and the current filter shows EWF02, the EPTWFU01 is the correct replacement. The two part numbers refer to the same physical filter cartridge across different brand labeling.

Is the EPTWFU01 the Same as the ULTRAWF

No. The EPTWFU01 vs ULTRAWF difference is the filtration system generation and housing format. The EPTWFU01 fits the PureSource Ultra II system with an upper right corner push-and-twist housing. The ULTRAWF fits the PureSource Ultra system with a ceiling-mount push-to-lock housing. They carry the same certifications and similar contaminant coverage but are not interchangeable. Checking the current filter label and installation position is the most reliable way to confirm which one the refrigerator uses before ordering.

Compatibility Checklist Before Ordering the EPTWFU01

Before placing an order, confirm all of the following:

  • The current filter label shows EPTWFU01, EPTWFU01B, EPTWFU01C, EWF02, or 5304456858
  • The filter housing is in the upper right corner inside the refrigerator, not on the ceiling
  • The installation is a push-and-twist design with a horizontal grip orientation
  • The refrigerator is a Frigidaire or Electrolux French door or side-by-side model produced after 2015
  • The refrigerator model is not a Frigidaire Gallery or Professional model using a ceiling-mount ULTRAWF housing

Common Mistakes When Ordering the EPTWFU01

  • Ordering the ULTRAWF when the refrigerator uses the EPTWFU01.
     Both carry NSF 42, 53, and 401 certifications and both fit Frigidaire Gallery and Professional models -- but across different system generations. The housing position is the quickest visual confirmation. EPTWFU01 is upper right corner. ULTRAWF is ceiling mount.
  • Assuming all aftermarket EPTWFU01 replacements carry NSF 53 and 401 certification.
     The OEM EPTWFU01 filter carries NSF 42, 53, and 401 certifications. Aftermarket versions certified only to NSF 42 focus on improving taste and odor by reducing chlorine but do not make claims for contaminant reduction beyond that. For households with lead concerns or documented water quality issues, NSF 53 certification is meaningful and worth verifying before choosing an aftermarket alternative.
  • Not resetting the filter indicator light after installation.
     The refrigerator reminder light does not turn off automatically. Most reminder lights are reset by pressing and holding the Water Filter button on the dispenser control for 3 seconds. When the display changes from red to green, the status has been reset. Skipping this step leaves the indicator red after a successful installation.
  • Skipping the flush after installation.
     Noise is not uncommon during the initial 3 to 4 gallon flush as air is being purged from the system. Running 3 to 4 gallons through the dispenser and discarding before drinking clears air pockets and carbon fines from the new filter. Skipping the flush causes cloudy water or an off taste on the first pour.
  • Installing the filter with the grip vertical rather than horizontal.
     Slide the filter in with the grip oriented horizontally. Push firmly and turn 90 degrees to the right until it clicks into place. Installing with the grip in the wrong orientation prevents the filter from locking correctly and results in poor water flow or minor leaking at the housing.

When to Replace or Order the EPTWFU01

Replace the Frigidaire EPTWFU01 PureSource Ultra II when any of the following apply:

  • 6 months have passed since the last replacement
  • The filter indicator light on the refrigerator panel has activated
  • Water develops a faint chlorine taste or flat odor
  • Dispenser flow has slowed noticeably
  • Ice comes out cloudy or with an off smell
  • The refrigerator is used by three or more people daily and the last replacement was four months ago

Recommended Replacement

The Frigidaire EPTWFU01 PureSource Ultra II water filter is available on the product page at Refrigerators filters shop. Confirm the current filter label shows EPTWFU01, EWF02, or one of the compatible part numbers listed above before ordering. If the current filter label shows ULTRAWF, the ULTRAWF product page covers the correct replacement for that housing. If the current filter label shows FPPWFU01 or PWF-1, the FPPWFU01 product page covers the correct replacement for that system.

FAQs

Does the EPTWFU01 fit both French door and side-by-side Frigidaire refrigerators?

Yes. The EPTWFU01 fits French door and side-by-side refrigerators by Frigidaire and Electrolux produced after 2015. It does not fit Frigidaire refrigerators produced before 2015 or models using the ULTRAWF ceiling-mount housing. Confirm the model year and filter housing position before ordering.

What is the difference between the EPTWFU01 and EWF02?

The EWF02 is the Electrolux-branded version of the same filter sold as EPTWFU01 under Frigidaire branding. Both refer to the same physical cartridge and are fully interchangeable. If the current filter label shows EWF02 on an Electrolux refrigerator, the EPTWFU01 is the confirmed correct replacement.

Does the EPTWFU01 reduce lead and cysts?

Yes. The EPTWFU01 is NSF 42, 53, and 401 certified to filter contaminants including chlorine taste and odor, lead, cysts, mercury, asbestos, pesticides, insecticides, BPA, and more. NSF 53 specifically covers health-related contaminants including lead and cysts -- a certification level that many aftermarket alternatives do not carry.

How is the EPTWFU01 installed and does the grip orientation matter?

Yes, the grip orientation matters. Slide the new filter in with the grip oriented horizontally. Push firmly and turn 90 degrees to the right until it clicks into place. Installing with the grip vertical prevents the filter from locking correctly. A confirmed click confirms correct installation.

Can aftermarket EPTWFU01 filters be used safely?

Aftermarket replacements are widely available at lower price points. The key specification to verify is NSF 53 certification in addition to NSF 42. Aftermarket versions certified only to NSF 42 focus on improving taste and odor by reducing chlorine but do not make claims for health contaminant reduction beyond that. For households with lead or cyst concerns in local water, verifying NSF 53 certification on any aftermarket replacement is worth doing before purchasing.

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