Imperial Berkey
For a big household or a shared office. It costs about $100 per gallon of capacity, a better rate than the smaller Berkeys.
Amazon $451$451
4.5 galTested only3,000 gal each
3.5/5
The largest Berkey, for a large family, a church kitchen or a workplace. Cheapest per gallon of capacity among the Berkeys.
- 6 galCapacity
- Tested onlyCertification
- 3,000 gal eachElement life
- Add-on filterFluoride
Check price at Amazon$478
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 6 gal is the largest capacity here
- Takes up to eight elements for 26 gal/hr maximum flow
Cons
- 30 in tall and 11 in wide, so most kitchens have no spot for it
- Not NSF certified
The Berkey family
Every Berkey model we rank, smallest first. Ratings compare each against its own capacity.
| Model | Capacity | Rating | Price |
|---|---|---|---|
| Travel Berkey | 1.5 gal | 2.4/5 | $327 |
| Big Berkey | 2.2 gal | 2.6/5 | $367 |
| Berkey Light | 2.8 gal | 2.8/5 | $335 |
| Royal Berkey | 3.2 gal | 2.9/5 | $408 |
| Imperial Berkey | 4.5 gal | 3.2/5 | $451 |
| Crown Berkey (this one) | 6 gal | 3.5/5 | $478 |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its capacity. How we rank explains each one.
Specifications
| Model number | CRN8X2-BB |
|---|---|
| Capacity and flow | |
| Tank capacity | 6 gal |
| Price per gallon of capacity | $79.67 |
| Elements included | 2 |
| Maximum elements | 8 |
| Flow, fully loaded | 26 gal/hr |
| Filtration | |
| Element type | Black Berkey carbon-media element (BB9-2) |
| Certified | Tested only |
| Certification detail | Berkey states Black Berkey Elements were tested by accredited third-party labs against ANSI/NSF protocols for 200+ contaminants. The elements are not NSF/ANSI certified. |
| Fluoride | Add-on filter |
| Running cost | |
| Rated life per element | 3,000 gal each |
| Replacement element | 140.9 $ |
| Cost per gallon filtered | $0.047 |
| Build | |
| Material | 304 stainless steel |
| Height | 30 in |
| Diameter | 11 in |
| Warranty | 1 year |
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