Waterdrop TK-A
A well-priced 2.25 gal system with certified carbon filters. The easy pick if you want Berkey-size capacity for less.
Amazon $159.99$159.99
2.2 galNSF/ANSI 42, NSF/ANSI 3723,000 gal each
3.5/5
A low-priced, certified-filter 2.25 gal system for chlorine, taste and sediment. Fluoride needs a different model.
- 2.2 galCapacity
- NSF/ANSI 42, NSF/ANSI 372Certification
- 3,000 gal eachElement life
Check price at Amazon$145.99
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Listed at 4 gal/hr, faster than most 2.25 gal systems
- A replacement pair costs about $74
Cons
- No fluoride reduction
- Listing publishes no warranty
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 | K8626 |
|---|---|
| Capacity and flow | |
| Tank capacity | 2.2 gal |
| Price per gallon of capacity | $64.88 |
| Elements included | 2 |
| Maximum elements | 2 |
| Flow, as shipped | 4 gal/hr |
| Filtration | |
| Element type | Black carbon composite: 0.01 micron UF membrane, silver ion membrane and carbon block |
| Certified | NSF/ANSI 42, NSF/ANSI 372 |
| Certification detail | Listing: the black carbon filter passed NSF/ANSI 42 certification and the system passed NSF/ANSI 372. |
| Running cost | |
| Rated life per element | 3,000 gal each |
| Replacement element | 37 $ |
| Cost per gallon filtered | $0.012 |
| Build | |
| Material | 304 stainless steel |
| Height | 20 in |
| Diameter | 8.9 in |
| Weight | 8.5 lb |
Alternatives in this capacity
Culligan MaxClear Scout 1 Filter
The entry Culligan MaxClear with a certified filter for people who want a name-brand 2.25 gal system at a low price.
Amazon $155$155
2.2 galNSF/ANSI 42
Waterdrop TK15-A
A small, low-priced certified gravity filter for one to three people, a trip or an RV.
Amazon $119.99$119.99
1.5 galNSF/ANSI 42, NSF/ANSI 3723,000 gal each
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