Culligan CUW4 Refrigerator Water Filter
- External Testing Certification: NSF, ANSI
- Material Type: Plastic
- Number of Items: 1
- Unit Count: 1
Last refreshed Jun 15, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A cheaper alternative to the OEM Whirlpool Filter 4 that fits most compatible fridges without issue, but confirm your exact model given at least one documented fit and leak problem.
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ASIN: B0B193TSSMModel: CUW4Category: Refrigerator Water Filters
Sizes Available
Styles Available
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Overview
A refrigerator water filter made as a compatible replacement for Whirlpool Filter 4 (EDR4RXD1/WHR4RXD1), fitting select Whirlpool, JennAir, KitchenAid and Maytag french door and side-by-side models. Rated for about 6 months of use.
- Replace every 6 months
- NSF/ANSI 42, 53, 401 certified
- Reduces lead and 8 pharmaceuticals
- Compatible fit, not OEM manufactured
Who it's for
Suits owners of compatible Whirlpool, JennAir, KitchenAid or Maytag refrigerators who want a lower-cost alternative to the OEM EDR4RXD1 filter. Skip it if your exact model is one where the aftermarket fit has run loose, or you can't tolerate any leak risk during a swap.
Pros and cons
- Compatible with Whirlpool EDR4RXD1 and WHR4RXD1
- Fits select JennAir, KitchenAid, Maytag models
- Reduces chlorine taste and odor
- Lower cost than the OEM filter
- Aftermarket fit reported loose on some models
- Brief leaking during initial installation for some
- Not the OEM Whirlpool part
Specifications
| Brand | Culligan |
|---|---|
| Model | CUW4 |
| Dimensions & fit | |
| Item Weight | 0.6 poundslower than 75% of 21 refrigerator water filters |
| Construction & materials | |
| Material Type | Plastic |
| Included components | |
| Unit Count | 1 |
| Included Components | Replacement Refrigerator Water Filter |
| Other details | |
| External Testing Certification | NSF, ANSI |
| Number of Items | 1 |
| Item Type Name | Refrigerator Water Filter |
Closest rivals on specs
Frigidaire EPTWFU01 and PAULTRA2 Water and Air Filter Kit- Item Weight 0.6 vs 0.53 pounds (+13%)
GE RPWFE Refrigerator Water Filter- Item Weight 0.6 vs 0.4 pounds (+50%)
Frequently asked questions
How often should the Culligan CUW4 be replaced?
Culligan recommends replacing it about every 6 months.
Has anyone reported leaks with the Culligan CUW4?
One reviewer reported a poor fit and leaking in their specific refrigerator model, though most others reported no leaks after installation.