Waterdrop WDP-F26A Water Filter
- External Testing Certification: NSF
- Product Benefits: Easy to install ; Reduce phenytoin, naproxen, estrone, bisphenol, lead, benzene, mercury, PFOA&PFOS in water
- Material Type: Lead-Free Material, Food-Grade Material, Advanced Activated Coconut Carbon Block
- Number Of Packs: 2
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A four-standard NSF certified 3 pack that offers strong contaminant coverage and change longevity for confirmed fits.
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ASIN: B01IDGI784Model: WDP-F26ACategory: Household Water Filters
Overview
This 3 pack from Waterdrop, model WDP-F26A, carries all four common NSF certifications, 42, 53, 401 and 372, and measures 7.48 x 2.6 x 9.45 inches per cartridge at 1.3 lb.
Like the Waterdrop ADQ36006101 elsewhere in this batch, this cartridge carries all four common NSF standards rather than just the taste and odor focused 42 and 372, adding 53 for health related contaminants and 401 for emerging compounds. The 3 pack format covers roughly 18 months of changes at a standard 6 month interval, more coverage per order than the 2 pack Waterdrop filter in this same lineup.
- NSF 42, 53, 401 & 372 certified
- 3 filters per pack
- 7.48 x 2.6 x 9.45 in cartridge size
- 1.3 lb per pack
Who it's for
Households replacing a filter under the WDP-F26A designation who want four-standard NSF coverage and a 3 pack's worth of changes in one order.
Pros and cons
- Four NSF standards: 42, 53, 401 and 372
- 3 pack covers about 18 months of changes
- Standard fridge filter dimensions
- No compatible refrigerator models listed
- Filter media material not specified
Performance notes
The four NSF standards here, 42, 53, 401 and 372, span taste and odor, health related contaminants, emerging compounds and lead free material compliance. At 1.3 lb per pack and roughly 9.45 inches long, the cartridges are sized like standard fridge filter housings.
Specifications
| Brand | Waterdrop |
|---|---|
| Model | WDP-F26A |
| Dimensions & fit | |
| Item Weight | 1.3 poundshigher than 56% of 35 household water filters |
| Item Dimensions D X W X H | 7.5 × 2.6 × 9.4 inches |
| Construction & materials | |
| Material Type | Lead-Free Material, Food-Grade Material, Advanced Activated Coconut Carbon Block |
| Compatibility & installation | |
| Compatible Water Purifier Models | 3M CS-451 |
| Included components | |
| Number Of Packs | 2 |
| Unit Count | 3 |
| Included Components | Month Install Stickers, Refrigerator Water Filter Replacement*3, User's Manual*1 |
| Other details | |
| External Testing Certification | NSF |
| Product Benefits | Easy to install ; Reduce phenytoin, naproxen, estrone, bisphenol, lead, benzene, mercury, PFOA&PFOS in water |
| Number Of Items | 3 |
| Set Name | 3 |
| Item Highlight | Replacement For Bosch® 640565, Whirlpool® WHKF-R-PLUS, 3M® Cuno CS-52, CS-51, NSF 401&53&42 Certified |
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Frequently asked questions
How many NSF standards does the WDP-F26A meet?
Four: NSF 42, 53, 401 and 372.
How many filters are included?
A 3 pack.
How long does the 3 pack last?
At a typical 6 month change interval, three filters cover about 18 months.