Maxblue MB-F20 Water Filter Review
Our verdict
The Maxblue MB-F20 is a competitively priced three-pack replacement filter certified to NSF 42 and 372, hitting a sweet spot of value and basic certification for buyers who primarily want better-tasting drinking water from their fridge dispenser.
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Cost-conscious buyers who want an NSF 42 certified three-pack to keep a ready supply of replacement filters
Skip if
Your water supply has known issues requiring NSF 53 or 401 certified reduction of specific contaminants
- Certification Nsf 42/372
- Pack 3
- Dimensions 5.43 X 1.85 X 7.87 In
- Priced 18% below the category median ($27.99 across 140 tracked models)
Our scorecard
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Owner rating4.7/5
4.7 average across 937 owner ratings
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Popularity2.7/5
937 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 MB-F20 from Maxblue comes as a three-pack priced at $22.99. Certified to NSF 42 and 372, it covers reduction of aesthetic impurities and meets lead-free material standards. That dual certification at this price point makes it a practical choice for everyday fridge water filtration.
The filter dimensions are 5.43 by 1.85 by 7.87 inches, a slender inline format typical of side-by-side refrigerator dispensers. With 937 reviews averaging 4.7 stars, the feedback base is solid without being massive. No capacity or service life data is available from the product specs.
At roughly $7.66 per filter in a three-pack, the MB-F20 is one of the more accessible options in this format. NSF 372 certification specifically addresses lead-free construction, which is worth noting for households concerned about material quality.
Pros
- Certified to both NSF 42 and NSF 372
- Three-pack value at $22.99 lowers per-filter cost
- 4.7-star average across 937 reviews
- Slender form factor fits a range of refrigerator dispenser systems
Cons
- No NSF 53 or 401 certification listed
- No rated capacity or filter life data provided
- Review count is moderate, limiting confidence for less common fridge models
Specifications
| Certification | Nsf 42/372 |
|---|---|
| Pack | 3 |
| Dimensions | 5.43 X 1.85 X 7.87 In |
Performance notes
The MB-F20 is certified to NSF 42, which covers the reduction of aesthetic impurities including chlorine taste and odor. NSF 372 certification addresses lead-free construction of the filter housing and components. No NSF 53 or 401 certifications are listed. Dimensions of 5.43 x 1.85 x 7.87 inches match the slim inline profile used in many French door and side-by-side refrigerator models.
What buyers say
At 937 reviews and a 4.7-star average, the MB-F20 has a positive and reasonably sized feedback record. The high average suggests consistent performance for buyers whose refrigerators are compatible. Fitment is the most common variable with third-party replacement filters, so confirming compatibility before ordering is worthwhile.
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Frequently asked questions
What does NSF 372 certification mean for the MB-F20?
NSF 372 is a certification that verifies the filter's wetted materials are lead-free, meaning the parts that contact drinking water meet lead content limits set by the Safe Drinking Water Act. It addresses the safety of the filter's construction materials, not the contaminants the filter media removes. The MB-F20 also holds NSF 42 certification, which covers reduction of aesthetic impurities like chlorine taste and odor.
Is the Maxblue MB-F20 a good deal as a three-pack?
At $22.99 for three filters, each unit comes to roughly $7.66. That is a meaningful discount compared to single-unit OEM pricing for most refrigerators. If your fridge uses a compatible filter format and you replace it on schedule, buying in a three-pack makes practical and financial sense.
How do I know when to replace the MB-F20?
No rated filter life is published in the available product specifications. Most refrigerator replacement filters are rated for approximately six months or around 200 to 300 gallons. Your refrigerator may have a built-in filter change indicator light that serves as the most reliable guide. Replace the filter sooner if you notice reduced water flow or changes in taste.