Doulton British Berkefeld Duke 2.25-Gallon review
By Daryna Klochko · Published · Specs checked Oct 15, 2026 · 
Scores 9.5/10, tied for 2nd of the 18 gravity filters we track. At $305 it costs more than the category median of $249. Doulton also claims Chlorine, Lead, VOCs, PFOA/PFOS, which are not in the listing. It carries a lifetime warranty, against a 3-year category median.
A certified health claim: NSF lists it for Cysts, Microplastics, one of 7 among the 18 gravity filters
- Price
- $305
- Certified for
- Cysts · Microplastics
- Flow
- Not stated
- Cartridge life
- 800 gal
- Cost per year
- $168
- Warranty
- Lifetime
Certification
Listed by NSF under NSF/ANSI 42 · 53 · 401 for Cysts, Microplastics, checked Oct 15, 2026. Doulton also claims 4 more substances that are not in the listing. Search the NSF listings
- Cysts
- Microplastics
Doulton also claims Chlorine, Lead, VOCs, PFOA/PFOS: brand claims, not in a certifier listing.
The contaminants or other substances removed or reduced by this water treatment device are not necessarily in your water. Listing checked on Oct 15, 2026. What a listing means and what it doesn't
Specs and sources
Checked Oct 15, 2026 · source under each valueFiltration
Cartridges and install
Buying
Warranty, returns and shipping
Lifetime against defects in materials; filters 2 years pro-rated.
14 days, unused; sale items final.
Warranty: Lifetime against defects in materials; filters 2 years pro-rated. Returns: 14 days, unused; sale items final. Shipping: not stated by the brand. Source: britishwaterfilter.com, checked Oct 15, 2026.
Source: britishwaterfilter.com, checked Oct 15, 2026.
Compared with similar gravity filters
All 18 gravity filters →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Doulton British Berkefeld Duchess 1.58-Gallon | $255 | Cysts · Microplastics | $168 | Lifetime | 9.5/10 | Check price → |
| Alexapure Pro | $279.99 | Brand claims only | $237 | Not stated | 8.5/10 | Check price → |
| Doulton British Berkefeld Duke 2.25-GallonTHIS MODEL | $305 | Cysts · Microplastics | $168 | Lifetime | 9.5/10 | Check price → |
| Santevia Glass Water System | $319.99 | Brand claims only | $161 | 10 years (limited) | 9.25/10 | See specs → |
| BOROUX Legacy 3-Gallon | $355 | Microplastics | $159 | Lifetime | 9.75/10 | Check price → |