Frigidaire ULTRAWF vs WF3CB vs EPTWFU01: Choosing the Right Water Filter for Your Refrigerator
When it comes to refrigerator water filters, not all are created equal. For Frigidaire refrigerator owners, the three most common filter models are ULTRAWF, WF3CB, and EPTWFU01. Each serves a specific generation of refrigerators, offering varying filtration capabilities, installation methods, and compatibility profiles. Choosing the wrong one can lead to leaks, poor water flow, or even ineffective filtration. In this guide, we break down the differences between these three popular Frigidaire filters to help you determine which one best fits your fridge and needs.
Understanding the Importance of the Right Refrigerator Filter
Your refrigerator water filter plays a critical role in maintaining the quality of the water you drink and the ice you use. It reduces harmful contaminants like chlorine, lead, and particulates while improving the taste and smell of your water. Over time, the filter media becomes clogged with impurities, reducing its effectiveness. That’s why Frigidaire recommends replacing your filter every 6 months or after filtering about 200 to 300 gallons of water.
Choosing the correct filter model is not just about getting clean water, it's about ensuring compatibility with your fridge’s design and maintaining consistent performance. Now let’s dive into what makes each of these filters unique.
ULTRAWF: The Frigidaire PureSource Ultra Filter
What it is: ULTRAWF is a PureSource Ultra filter designed for use in many French door and side-by-side refrigerators manufactured by Frigidaire.
Where it's located: The filter housing is typically found in the top-right corner of the refrigerator compartment. The ULTRAWF uses a push-and-click mechanism, making it easy to remove and replace.
Key features:
- NSF 42, 53, and 401 certified for contaminant reduction
- Removes up to 99% of contaminants, including lead, chlorine, pesticides, and pharmaceuticals
- Filters up to 200 gallons
Compatibility: ULTRAWF is not interchangeable with other Frigidaire filter models. Always confirm your refrigerator’s model number before making a purchase.
Common models: Works with Frigidaire Gallery and Professional series French door models. Check your current filter or fridge manual for confirmation.
WF3CB: The PureSource 3 Filter for Side-by-Side Models
What it is: The WF3CB is an older model water filter known as the PureSource 3. It is designed for specific side-by-side Frigidaire refrigerators.
Where it's located: Often installed in the front bottom grille or inside the top right section of the fridge.
Key features:
- NSF 42 and 53 certified
- Filters up to 200 gallons
- Reduces chlorine taste and odor, lead, cysts, and particulates
Compatibility: Not compatible with ULTRAWF or EPTWFU01. Filters using WF3CB generally have a twist-in installation method.
Common models: Many older Frigidaire side-by-side refrigerators, particularly those manufactured between the early 2000s and mid-2000s, utilize this filter.
EPTWFU01: The PureSource Ultra II for Newer Models
What it is: The EPTWFU01 is the most advanced of the three and is part of the PureSource Ultra II series. It's found in newer models of Frigidaire refrigerators and is designed to meet higher filtration standards.
Where it's located: Found in the top-right corner of the fresh food compartment, often with a push-to-release mechanism.
Key features:
- NSF 42, 53, and 401 certified
- Removes up to 99.3% of lead, chlorine, BPA, mercury, and more
- Filters up to 200 gallons
- Enhanced technology for pharmaceutical and chemical removal
Compatibility: This part is only compatible with models that specifically require EPTWFU01. Cannot be used in place of ULTRAWF or WF3CB.
Common models: Most newer Frigidaire refrigerators released after 2015, as well as some Electrolux models, are compatible.
How to Identify the Correct Filter for Your Fridge
Selecting the right filter starts with identifying your refrigerator’s model number. This can typically be found on the inside wall of your fridge or a sticker located in the fresh food section. Once you have this number, check the user manual or search the model number on FilterAppliance’s Frigidaire collection page.
Alternatively, if your existing filter is still installed, remove it and inspect the label. The model number (e.g., ULTRAWF, WF3CB, EPTWFU01) will usually be printed clearly on the cartridge. Never attempt to force a filter into a housing that is not designed for it. It may fit, but improper sealing can result in leaks or contamination.
Comparing the Three Filters
While each filter model serves the same fundamental purpose, they differ in terms of filtration technology, certification standards, and compatibility. Here's a breakdown:
| Feature | ULTRAWF | WFCB | EPTWFU01 |
|---|---|---|---|
| Certification | NSF 42, 53, 401 | NSF 42, 53 | NSF 42, 53, 401 |
| Filter Capacity | 200 gallons | 200 gallons | 200 gallons |
| Filtration Focus | Lead, chlorine, pharmaceuticals | Chlorine, particulates, lead | Lead, chlorine, BPA, pesticides |
| Installation | Push-and-click | Twist-in | Push-to-release |
| Compatible Fridges | French door (Gallery, Pro) | Side-by-side (older models) | Newer models (post-2015) |
How Often Should You Replace Your Filter?
Frigidaire recommends replacing your refrigerator water filter every 6 months or sooner if you notice a decrease in water flow, a change in water taste, or a change in water smell. Over time, the filter's ability to remove contaminants diminishes, even if your water appears clean.
Signs it's time to replace your filter:
- Bad taste or odor in water
- Slow water dispensing
- Cloudy ice or water
- The filter indicator light is on (if your model has this feature)
Keeping to the 6-month schedule ensures your water stays fresh and your fridge operates at peak performance.
What Happens If You Use the Wrong Filter?
Using the incorrect filter may result in poor filtration performance, physical damage to the filter housing, or even leaks. Incompatible filters may not seal properly, allowing unfiltered water to bypass the system or causing damage to internal components.
Additionally, filters not certified to the right NSF standards may fail to remove harmful contaminants from your water. While some third-party filters claim to work universally, it’s best to stick with certified models that are specifically designed to match your fridge's specifications.
Where to Buy Authentic Frigidaire Filters
To avoid knockoffs and ensure high performance, purchase your filters from a trusted retailer like FilterAppliance.com. You’ll find certified replacements for ULTRAWF, WF3CB, and EPTWFU01, all backed by performance guarantees.
Using authentic filters means better-tasting water, fewer maintenance issues, and peace of mind that your family is drinking clean, healthy water.
Final Thoughts
Whether you’re a longtime Frigidaire owner or have just purchased a new fridge, understanding which water filter model your appliance uses is crucial to maintaining clean and safe water, ULTRAWF, WF3CB, and EPTWFU01 each serve a different purpose, and using the correct one ensures optimal performance.
Take the time to identify your refrigerator model, match the right filter, and adhere to your 6-month replacement schedule. And when it’s time to restock, trust FilterAppliance to deliver the right filter, right on time.
Ready to replace your filter? Shop Frigidaire Water Filters today.
