Big Berkey Water Filter System (BK4X2-BB)
2.25-Gallon Capacity | Filters Up to 7.0 Gallons Per Hour | 2 Black Berkey Filters Included
The Big Berkey is Berkey's most popular gravity-fed water purification system — trusted by families, RV owners, and emergency preparedness households worldwide. It delivers the same lab-verified purification performance as all Berkey systems in a versatile countertop footprint that scales from 1 to 16 people.
Why Choose the Big Berkey?
- Removes 99.999% of viruses, 99.9999% of pathogenic bacteria, chloramine, trihalomethanes, pharmaceuticals, pesticides, heavy metals, and 200+ contaminants
- Filters up to 3.5 GPH with 2 filters or 7.0 GPH with 4 filters (upgradeable)
- Serves 1–16 people for daily drinking water needs
- No electricity, no plumbing — gravity does the work
- Lifetime-grade 304 high-polish stainless steel construction
- Ideal for home, RV, tiny house, and emergency use
What's Included
- Big Berkey upper and lower chambers (304 stainless steel)
- 2 × Black Berkey Purification Filter Elements
- BPA-free, FDA-approved polypropylene spigot
- Assembly instructions — ready in minutes, no tools required
Specifications
| Capacity | 2.25 Gallons (8.5 L) |
| Dimensions (Assembled) | 8.5 × 8.5 × 21.0 in |
| Dimensions (Nested) | 8.5 × 8.5 × 13.0 in |
| Weight (Empty) | 7 lbs |
| Weight (Full) | 25.76 lbs |
| Material | High-polish 304 stainless steel |
| Max Filters | 4 Black Berkey Elements |
| Flow Rate (2 filters) | Up to 3.5 GPH |
| Flow Rate (4 filters) | Up to 7.0 GPH |
| Filter Lifespan | 3,000 gal/filter | 6,000 gal/set of 2 |
| Certifications | Tested to exceed NSF/ANSI Standard 53 by state & EPA-accredited labs |
| SKU | BK4X2-BB |
| Availability | Not available in Iowa or California |
Black Berkey Filter Performance
Each Black Berkey element is composed of high-grade coconut shell carbon blended with 5 proprietary media types. Independent lab testing confirms removal of:
- Viruses: 99.999%
- Pathogenic bacteria: 99.9999%
- Chloramine: below lab detectable limit
- Trihalomethanes: 99.8%
- Pharmaceuticals: 99.9%
- Pesticides: below lab detectable limit
- Heavy metals and 200+ total contaminants
*Not yet available in Iowa or California.*
Launch DateApril 17, 2021
Days In Market2,011
VendorBerkey®
Variants1