Maxblue MB-F11B Water Filter Review
Our verdict
The Maxblue MB-F11B is a compact, single-unit filter certified to NSF 42 and 372 at $13.99, with around 1,000 reviews averaging 4.6 stars. It is a lean offering without a multi-pack option, but the price is low and the certifications are solid.
Check price on AmazonBest for
Buyers who want a budget-priced NSF 42 and 372 certified filter and prefer buying one at a time to test compatibility before committing to a larger order.
Skip if
You want multi-pack savings, need certifications beyond NSF 42, or require a filter with a larger review pool for added confidence.
- Certification Nsf 42/372
- Pack 1
- Dimensions 3.15 X 3.15 X 6.22 In
- Weight 0.71 lb
- Priced 50% below the category median ($27.99 across 140 tracked models)
- Pack of 1 - fewer than 64% of the 140 models we track
- Weight of 0.71 lb - lighter than 78% of the 140 models we track
Our scorecard
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Owner rating4.6/5
4.6 average across 1,000 owner ratings
-
Popularity2.9/5
1,000 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
['NSF 42 certification covers reduction of aesthetic impurities including chlorine taste and odor. NSF 372 confirms low-lead material construction in the wetted components. Both are third-party verifications by NSF International, not manufacturer claims. At $13.99 for a single filter, the price is near the low end of the certified aftermarket market.', 'The dimensions of 3.15 x 3.15 x 6.22 inches and 0.71-pound weight indicate a compact form factor. This size is typically associated with smaller refrigerator filter formats found in certain LG and Samsung bottom-freezer or French door models, though buyers should confirm compatibility.', 'Around 1,000 reviews at 4.6 stars indicates a product that has reached a meaningful scale without accumulating significant buyer dissatisfaction. Maxblue is a smaller brand in the aftermarket filter space, but the NSF 42 and 372 certifications provide independent validation that does not depend on brand recognition.']
Pros
- NSF 42 and 372 certified for aesthetic impurity reduction and low-lead construction
- Competitive single-unit price at $13.99
- Compact form factor at 3.15 x 3.15 x 6.22 inches and 0.71 pounds
- 4.6-star average from around 1,000 reviews
Cons
- Single-unit only, no multi-pack discount available
- No gallon capacity or replacement interval listed
- Smaller brand profile compared to Waterdrop or Pureline
Specifications
| Certification | Nsf 42/372 |
|---|---|
| Pack | 1 |
| Dimensions | 3.15 X 3.15 X 6.22 In |
| Weight | 0.71 lb |
Performance notes
Certified to NSF 42 for aesthetic impurity reduction, specifically chlorine taste and odor, and NSF 372 for low-lead wetted surface materials. No additional certifications such as NSF 53 for health-related contaminants are listed. No flow rate, gallon life, or micron rating is included in the available product data. The compact dimensions and sub-pound weight make this a small-footprint filter well suited to space-constrained refrigerator filter housings.
What buyers say
With around 1,000 reviews at 4.6 stars, the MB-F11B has enough feedback to be considered a reliable signal. The 4.6-star average places it slightly below the top-rated filters in this group but well within the range of competent aftermarket options. Most buyers in this category are evaluating fit, taste improvement, and ease of installation, and the score suggests those needs are being met for the majority.
More from Maxblue
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Frequently asked questions
What does NSF 42 actually test for?
NSF 42 is a standard for aesthetic effects in drinking water. It tests a filter's ability to reduce chlorine taste and chlorine odor, along with possible reduction of particulate matter at defined size classes. It does not test for health-related contaminants such as lead, arsenic, or cysts. For those, NSF 53 or NSF 58 certification would be required.
Is $13.99 for a single filter a good deal in the aftermarket category?
Certified single-unit aftermarket filters typically range from $10 to $20. At $13.99 with both NSF 42 and 372 certifications, the MB-F11B sits in the lower half of that range. OEM filters for the same refrigerators usually cost $40 to $55, so the savings are meaningful if the filter fits your model. Confirm compatibility before ordering, or contact [email protected] for help.