Culligan CUW4 Refrigerator Water Filter
- 1 filter, replaces Whirlpool Filter 4 EDR4RXD1
- 50 impurities listed, including lead and chlorine taste and odor
- 8 pharmaceuticals and cysts reduced per the listing
- NSF and ANSI certified, per the specs
- Replace every 6 months
- 3 x 3 x 9 inches, 0.6 pounds
Last refreshed Jun 15, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A single replacement cartridge for refrigerators that use the matching Whirlpool cartridge, with a long list of reduction claims. Fit is stated by part number, not by model list.
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ASIN: B0B193TSSMModel: CUW4Category: Refrigerator Water Filters
Sizes Available
Styles Available
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Overview
Swapping a spent refrigerator cartridge for this Culligan replacement is the whole job. An activated carbon cartridge catches impurities as water passes through, and the title ties it to the Whirlpool EDR4RXD1 part.
The reduction claims cover lead, asbestos, chlorine taste and odor, pharmaceuticals and cysts, with the standard cited in the description. A half-year replacement schedule is stated in the title. There is no refrigerator model list, so match the part number.
Who it's for
Owners with the matching cartridge who want a branded replacement and a stated certification suit it. Buyers with other filter formats should check their own part number.
Pros and cons
- Long list of reduction claims
- Activated carbon cartridge
- NSF and ANSI certification stated
- Stated replacement schedule
- No refrigerator model list
- Single filter in the pack
- Reduction varies by water supply
Performance notes
Water passes through an activated carbon cartridge, which adsorbs chlorine taste and odor and carbon-based compounds. The description notes that substances reduced are not necessarily in every user's water. Flow and life depend on the water supply and the schedule you follow.
Specifications
| Brand | Culligan |
|---|---|
| Model | CUW4 |
| Dimensions & fit | |
| Item weight | 0.6 pounds |
| Item Dimensions D x W x H | 3 x 3 x 9 inches (D x W x H) |
| Construction & materials | |
| Material Type | Plastic |
| Compatibility & installation | |
| Compatible Refrigerator Models | Whirlpool Water Filter 4 (EDR4RXD1) |
| Included components | |
| Number Of Packs | 1 |
| Included Components | Replacement refrigerator water filter |
| Other details | |
| External Testing Certification | NSF, ANSI |
| Product Benefits | 50 impurities including lead, asbestos, chlorine taste and odor, 8 pharmaceuticals, cysts |
Closest rivals on specs
GE RPWFE Refrigerator Water Filter- Item Weight 0.6 vs 0.4 pounds (+50%)
Pureplus Refrigerator Water and Air Filter Combo- Item Weight 0.6 vs 0.4 pounds (+50%)
Frequently asked questions
Does the Culligan CUW4 fit my Whirlpool refrigerator?
It is listed as a replacement for Whirlpool Water Filter 4 (EDR4RXD1). The listing gives no model list, so check your fridge's filter part number.
How often should I replace the Culligan CUW4?
The title says to replace every 6 months.
What does the Culligan CUW4 filter reduce?
The listing names lead, asbestos, chlorine taste and odor, 8 pharmaceuticals and cysts, among 50 impurities.
Is the Culligan CUW4 certified?
The specs list NSF and ANSI, and the description cites IAPMO R&T against NSF/ANSI 42, 53 and 401.