Berkey BER-CU2+BER-PF2 Filtration System Review
Our verdict
The Crown Berkey with PF-2 filters is the largest Berkey gravity configuration widely available, pairing a 6-gallon stainless steel tower with added fluoride and arsenic reduction elements. At $551 and 4.5 stars from 215 reviewers it is a premium option for buyers who want both high capacity and the extra PF-2 filtration stage.
Check price on AmazonBest for
Large households or small offices that want maximum gravity-filter capacity plus PF-2 fluoride and arsenic reduction in a single non-plumbed unit.
Skip if
You need NSF/ANSI certification, want a compact profile, or need faster output than gravity allows.
- Purification Unique Black Berkey Proprietary Filter Media
- Capacity / life 6 Gallons
- Install Countertop
- Material Stainless Steel
- Dimensions 10 X 10 X 25.75 In
- Weight 12.0 lb
- Priced 79% above the category median ($307.99 across 65 tracked models)
Our scorecard
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Owner rating4.5/5
4.5 average across 215 owner ratings
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Popularity2.2/5
215 owner reviews, fewer 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 Berkey BER-CU2+BER-PF2 combines two Black Berkey filter elements with PF-2 post-filter elements in Berkey's Crown-size stainless steel housing. The system holds 6 gallons total, stands 10 by 10 by 25.75 inches, and weighs 12 pounds. The Black Berkey elements use a proprietary filter media for the primary filtration pass, with PF-2 elements added for fluoride and arsenic reduction.", 'No NSF/ANSI certification is listed for this configuration. The gravity-fed design does not require electricity or plumbing, making it portable and useful in off-grid or emergency scenarios. Flow rate is limited by gravity, which is a consideration for high-daily-use households.', 'With 215 reviews at 4.5 stars, buyer sentiment is positive for a product at this price tier. The $551 price is the highest in the Berkey countertop lineup covered here, reflecting the larger housing and the inclusion of PF-2 elements. No recent monthly purchase volume was recorded, consistent with a considered, premium purchase.']
Pros
- 6-gallon capacity is among the largest available in gravity filtration
- Includes PF-2 elements designed to reduce fluoride and arsenic
- Stainless steel construction at 12 pounds is solid and durable
- No plumbing or electricity required
- 4.5 stars from 215 reviews shows consistent buyer satisfaction
Cons
- No NSF/ANSI certification listed for any filtration claims
- At $551, it is the most expensive Berkey gravity configuration covered here
- 12-pound body can be cumbersome to move or clean
- Gravity flow cannot match the output rate of pressurized under-sink systems
Specifications
| Purification | Unique Black Berkey Proprietary Filter Media |
|---|---|
| Capacity / life | 6 Gallons |
| Install | Countertop |
| Material | Stainless Steel |
| Dimensions | 10 X 10 X 25.75 In |
| Weight | 12.0 lb |
Performance notes
The Black Berkey proprietary filter media handles primary filtration. The PF-2 elements are designed to reduce fluoride and arsenic as a secondary stage. Because no NSF/ANSI certification is published for this unit, AquaGroove cannot state which contaminants it is certified to reduce. Total capacity is 6 gallons across both chambers. At 25.75 inches tall, the system requires adequate overhead clearance to fill the upper chamber comfortably.
What buyers say
A 4.5-star average from 215 reviews places this at the upper end of buyer satisfaction for gravity filtration systems. The smaller review pool compared to the RB4X2-BB+PF2 means the rating carries somewhat less statistical weight, but there are no signals of widespread negative feedback. No recent monthly purchase data was available.
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Frequently asked questions
How does the BER-CU2+BER-PF2 differ from the RB4X2-BB+PF2 also sold by Berkey?
The primary difference is the housing size. The CU2 uses the Crown housing, which holds 6 gallons total, while the RB4X2 uses the Royal housing at approximately 12.65 liters (about 3.34 gallons). Both include PF-2 post-filter elements for fluoride and arsenic reduction. The Crown is the better fit for larger households or situations where a bigger water reserve is important.
Is the 12-pound weight listed for the full or empty unit?
The 12-pound figure reflects the weight of the stainless steel components without water. A full lower chamber holding 6 gallons of water adds roughly 50 pounds of water weight on top of that, so the total filled system is considerably heavier. Plan placement accordingly and ensure the surface can support the load.
Does this system work during a power outage?
Yes. Because it is gravity-fed with no electrical components, it operates entirely independent of power. You pour water into the upper chamber and gravity moves it through the filter elements into the lower chamber at the system's natural flow rate. This makes it a practical choice for emergency preparedness planning.