Is the Frigidaire ULTRAWF the Same as the PWF-1 Filter?

Understanding the Frigidaire ULTRAWF and PWF-1 Water Filters for Frigidaire Refrigerators

When it comes to maintaining your refrigerator's water and ice quality, choosing the right filter is essential. The Frigidaire ULTRAWF, widely recognized by engineering part number 242017801, and the legacy PWF-1 (part 240394501) are dedicated water filtration components engineered across different generations of Frigidaire and Electrolux appliances. At Smartfiltersusa, we specialize in helping homeowners and businesses identify the correct replacement filters for their appliances, ensuring optimal flow, leak-free operation, and maximum water purity.

The ULTRAWF and PWF-1 filters play a vital role in reducing heavy metals, pharmaceuticals, chlorine taste, and microscopic sediment. Explore our full catalog of OEM and certified replacement refrigerator water filters to keep your dispenser running at peak performance.

What Are the ULTRAWF and PWF-1 Filters?

The Frigidaire ULTRAWF (PureSource Ultra, part 242017801) is an advanced high-capacity water filtration cartridge engineered with a dense carbon block core certified to NSF/ANSI Standards 42, 53, and 401. In contrast, the PWF-1 (PureSource 1, part 240394501) represents Frigidaire’s legacy filtration format designed primarily for basic particulate reduction and chlorine taste abatement under NSF/ANSI 42 standards.

While the modern ULTRAWF features a push-and-turn cylindrical housing with a locking head that seats flush into the upper right ceiling compartment, the PWF-1 uses an extended neck threaded collar system designed for older vertical screw-in housings, making the two cartridges mechanically incompatible.

Complete List of Compatible Refrigerator Models

The Frigidaire ULTRAWF and PWF-1 filters are engineered for French door, side-by-side, and top-mount refrigerators from Frigidaire, Electrolux, and Kenmore platforms, aligned strictly by production generation and internal manifold design.

Compatibility & Refrigerator Series Table

How to Identify if Your Refrigerator Uses ULTRAWF or PWF-1

4-Step Identification Guide

1. Locate the Data Plate: Find the factory sticker on the upper interior sidewall or behind the crisper drawer to record your full Frigidaire or Kenmore model number.
2. Examine the Installed Filter: Remove the current cartridge and inspect the printed label. Look specifically for ULTRAWF, PureSource Ultra, or legacy code PWF-1.
3. Inspect the Housing Receptacle: The ULTRAWF features a push-and-click slider or quarter-turn mechanism in the upper right ceiling, while the PWF-1 mounts in a circular screw-in cup assembly.
4. Cross-Reference with Support Tools: Search your appliance model number on Smartfiltersusa to verify direct compatibility before ordering.

Installation and Replacement Guide

Step-by-Step Installation Process

Step 1: Locate the Housing — The compartment is typically situated in the upper right interior ceiling (ULTRAWF) or housed within a dedicated lower or side enclosure cup (PWF-1).

Step 2: Release the Old Filter — For ULTRAWF, press the release button or twist a quarter-turn counterclockwise to disengage. For PWF-1, carefully unscrew the cartridge counterclockwise until completely free.

Step 3: Unpack the Replacement Filter — Remove all sanitary end caps and seal wrap. Verify that the sealing rings and manifold interface notches are intact and clean.

Step 4: Insert and Engage — For ULTRAWF, align the guide tabs and press firmly inward until it audibly clicks into place. For PWF-1, thread the filter clockwise into the base until snug without over-tightening.

Step 5: Purge & Flush the System — Dispense 2 to 3 gallons (approx. 3 to 4 minutes) of water continuously to bleed air bubbles and clear manufacturing carbon fines.

Step 6: Reset Filter Indicator — Press and hold the Filter Reset or Water Filter button on the dispenser control panel for 3 seconds until the light turns green.

Performance Benefits and Filtration Capabilities

Contaminant Reduction & Water Quality Table

Maintenance and Care Tips

Filter Lifespan & Quality Best Practices

Frequently Asked Questions About Frigidaire ULTRAWF & PWF-1

1. Are the Frigidaire ULTRAWF and PWF-1 interchangeable?

No. The ULTRAWF and PWF-1 use entirely different neck dimensions, housing depths, and locking interfaces. The ULTRAWF uses a quarter-turn push-and-click mount, while the PWF-1 uses a threaded screw-in connection.

2. How can I visually tell the difference between ULTRAWF and PWF-1?

The ULTRAWF measures approximately 5.5 inches in length with a push-button connector head, whereas the older PWF-1 is longer (approximately 6.5 inches) and features external circular threading along its connector neck.

3. How often should I replace my Frigidaire filter cartridge?

The ULTRAWF should be replaced every 6 months or 200 gallons. The legacy PWF-1 cartridge has a smaller carbon capacity and should be replaced every 3 to 4 months or 100 to 150 gallons.

4. Is it safe to drink water if the filter is overdue for replacement?

While tap water remains treated, an overdue filter loses absorption efficiency, allowing accumulated sediment, chlorine, and previously captured impurities to bypass into your dispenser and ice maker.

5. Can I clean and reuse my Frigidaire water filter?

No. The dense internal carbon block permanently absorbs microscopic contaminants within its porous structure. Attempting to wash or rinse the filter cartridge cannot regenerate its media and will damage filtration integrity.

6. What contaminants do ULTRAWF and PWF-1 filters reduce?

The ULTRAWF is certified under NSF 42, 53, and 401 to reduce 99% of lead, cysts, pharmaceuticals, and chlorine. The PWF-1 is primarily certified under NSF 42 to reduce chlorine taste, odor, and coarse sediment particulates.

7. What should I do if the new filter causes a knocking noise or low water flow?

A knocking noise or uneven flow indicates trapped air pockets inside the internal lines. Running 2 to 3 gallons of water continuously through the door dispenser expels the air and stabilizes internal pressure.

8. Where can I buy genuine and certified Frigidaire replacement filters?

You can purchase genuine, factory-tested replacement filters directly through Smartfiltersusa with guaranteed compatibility and fast delivery.

Conclusion

The Frigidaire ULTRAWF and PWF-1 filters represent critical stages in Frigidaire's residential water treatment evolution, ensuring pure, great-tasting drinking water and clear ice when correctly matched to your appliance. Adhering to the recommended replacement intervals safeguards your refrigerator’s internal ice maker mechanisms and ensures your household receives peak protection against harmful contaminants.

At Smartfiltersusa, we are dedicated to providing premium refrigerator water filtration solutions for Whirlpool, GE, LG, and Samsung appliances. If you have questions regarding model compatibility, message our specialist team on WhatsApp at 81 2590 8567.