Waterdrop TK-AB-FS
A cheaper way to get fluoride filters in the box than the TK-FS, with silver in the carbon filters.
Amazon $199.99$199.99
The Waterdrop TK-AB-FS and the Culligan MaxClear Scout 2 Filters are evenly matched, rated 3.3 and 3.2. The Waterdrop TK-AB-FS leads on certification. The Culligan MaxClear Scout 2 Filters wins on warranty.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Culligan MaxClear Scout 2 Filters
The Scout with its full set of two filters. Buy this one if you will fill the tank daily.
Amazon $199$199
Which should you buy?
- Choose the Waterdrop TK-AB-FS for certification (states certification to NSF/ANSI 42, NSF/ANSI 372 vs states certification to NSF/ANSI 42).
- Choose the Culligan MaxClear Scout 2 Filters for warranty (5-year warranty vs 1-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 2.25 gal gravity water filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Waterdrop TK-AB-FS | Culligan MaxClear Scout 2 Filters |
|---|---|---|
| Overall rating | 3.3/5 | 3.2/5 |
| Value 25% | 64 $88.88 per gallon of capacity ($199.99, 2.2 gal) | 65 $88.44 per gallon of capacity ($199, 2.2 gal) |
| Running cost 15% | 50 replacement cost or element life not published (neutral score used) | 50 replacement cost or element life not published (neutral score used) |
| Capacity 15% | 17 2.2 gal tank | 17 2.2 gal tank |
| Certification 20% | 40 states certification to NSF/ANSI 42, NSF/ANSI 372 | 30 states certification to NSF/ANSI 42 |
| Element life 15% | 100 3,000 gal rated per element | 50 element life in gallons not published (neutral score used) |
| Warranty 10% | 11 1-year warranty | 100 5-year warranty |
Specifications
| Waterdrop TK-AB-FS | Culligan MaxClear Scout 2 Filters | |
|---|---|---|
| Capacity and flow | ||
| Tank capacity | 2.2 gal | 2.2 gal |
| Price per gallon of capacity | $88.88 | $88.44 |
| Elements included | 4 | 2 |
| Maximum elements | 4 | 2 |
| Filtration | ||
| Element type | Coconut shell carbon block with silver ions (black) | MaxClear ceramic shell with carbon media |
| Certified | NSF/ANSI 42, NSF/ANSI 372 | NSF/ANSI 42 |
| Certification detail | Listing title: NSF/ANSI 42&372 Standard. The listing text does not say which component is certified. | Listing: IAPMO certified to NSF/ANSI 42 to reduce microplastics, lead and Total PFAS. The listing does not name the standards behind the lead and PFAS claims. |
| Fluoride | Included | - |
| Fluoride element life | 1,000 gal | - |
| Running cost | ||
| Rated life per element | 3,000 gal each | - |
| Replacement element | - | 79 $ |
| Build | ||
| Material | 304 stainless steel | brushed or polished stainless steel |
| Height | - | 26 in |
| Diameter | - | 8.6 in |
| Warranty | 1 year | 5 years |