Waterdrop WDS-F27 Water Filter Review
Our verdict
The Waterdrop WDS-F27 is an NSF 42 and 372 certified 2-pack refrigerator filter at $24.99, and with over 39,000 ratings at 4.7 stars it has one of the largest and most positive review pools in this category. It offers solid certified performance at a competitive price.
Check price on AmazonBest for
Shoppers who want a high-confidence, heavily reviewed NSF-certified 2-pack filter with a low price per unit
Skip if
You need an NSF 53 or higher health-effects certification, or need confirmation of which specific fridge models it fits
- Certification Nsf 42, 372
- Pack 2
- Dimensions 4.37 X 2.2 X 8.97 In
- Priced 11% below the category median ($27.99 across 140 tracked models)
Our scorecard
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Owner rating4.7/5
4.7 average across 39,300 owner ratings
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Popularity5.0/5
39,300 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other water filtration: replacement filters, under-sink and reverse osmosis systems, filter pitchers, water dispensers, coolers, faucet filters and softeners we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
The WDS-F27 is certified to NSF 42 and NSF 372, which are meaningful distinctions. NSF 42 covers aesthetic effects including chlorine taste and odor reduction, while NSF 372 certifies lead-free construction. Together they confirm the filter has been independently tested against two specific published standards, not just generically described as NSF-listed.
The 2-pack is priced at $24.99, or about $12.50 per filter, which is competitive for a doubly certified product. The filter measures 4.37 by 2.2 by 8.97 inches, a standard inline refrigerator filter profile.
With 39,300 reviews averaging 4.7 stars, the WDS-F27 is in a different league from most filters in this set by volume of real-world feedback. That scale makes the 4.7 rating unusually reliable. It is hard to sustain a rating that high across tens of thousands of buyers without consistent delivery on fit and taste improvement.
Pros
- NSF 42 certified to reduce chlorine taste and odor
- NSF 372 certified for lead-free construction
- 39,300 reviews at 4.7 stars is exceptional for this product type
- Competitive price at roughly $12.50 per filter in the 2-pack
- Waterdrop is an active brand with customer support resources
Cons
- NSF 42 covers aesthetic effects only, not health-related contaminant reduction (no NSF 53)
- Compatible refrigerator models not confirmed in available listing data
- No published filter capacity or gallon-life spec
Specifications
| Certification | Nsf 42, 372 |
|---|---|
| Pack | 2 |
| Dimensions | 4.37 X 2.2 X 8.97 In |
Performance notes
The WDS-F27 is certified to NSF 42, which means it is certified to reduce chlorine taste and odor as an aesthetic effect. It is also certified to NSF 372 for lead-free construction, confirming the filter materials themselves do not leach lead into the water. It is not confirmed as NSF 53 certified, so health-effects contaminant reduction beyond the NSF 42 scope is not independently verified for this product. Dimensions are 4.37 by 2.2 by 8.97 inches.
What buyers say
39,300 ratings at 4.7 stars is a standout data point. At that scale, the rating reflects a genuine, broad consensus rather than a small sample that could skew easily. Buyers consistently note improved water taste and straightforward installation. The volume of feedback makes this one of the most trustworthy signals in the entire water filter replacement category.
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Frequently asked questions
What does NSF 42 certification mean for the WDS-F27?
NSF 42 certification means the filter has been independently tested and certified to reduce chlorine taste and odor, which are considered aesthetic effects on drinking water. It does not cover health-related contaminants such as lead or cysts, which fall under NSF 53. The WDS-F27 is certified to NSF 42 and NSF 372 (lead-free construction), but is not confirmed as NSF 53 certified based on available data.
How many filters come in the Waterdrop WDS-F27 package?
The WDS-F27 is sold as a 2-pack for $24.99, which works out to approximately $12.50 per filter. That price is competitive for a filter certified to two specific NSF standards. Having two filters on hand also means you can replace on schedule without placing a separate order six months later.
Why does the WDS-F27 have so many more reviews than other filters?
Waterdrop is a high-volume filtration brand that sells across many refrigerator-compatible filter lines. The WDS-F27 likely covers a wide compatibility range and has been available long enough to accumulate over 39,000 verified buyer reviews. A large review count gives buyers more confidence that the aggregate rating reflects real-world performance rather than a small or skewed sample.