Waterdrop King Tank 2.25-Gallon review
By Daryna Klochko · Published · Specs checked Oct 14, 2026 · 
Scores 8.75/10, tied for 10th of the 18 gravity filters we track. At $199.99 it costs less than the category median of $249. Its cartridge cost of about $35 a year is less than half the $168-a-year median of the 13 gravity filters with a stated cartridge cost. Its 1-year warranty is shorter than the 3-year category median.
You need a certified health claim: none was found for it, unlike 7 of the 18 gravity filters
- Price
- $199.99
- Certified for
- Brand claims only
- Flow
- Not stated
- Cartridge life
- 6,000 gal claimed
- Cost per year
- $35
- Warranty
- 1 year
Certification
Materials listing only: Waterdrop publishes its own test data; we found no certifier listing that covers reduction claims.
Waterdrop also claims Chlorine, Fluoride: 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 14, 2026. What a listing means and what it doesn't
Specs and sources
Checked Oct 14, 2026 · all from waterdropfilter.comFiltration
Cartridges and install
Buying
Warranty, returns and shipping
Warranty: 1 year. Returns: 30 days. Shipping: not stated by the brand. Source: waterdropfilter.com, checked Oct 14, 2026.
Source: waterdropfilter.com, checked Oct 14, 2026.
Compared with similar gravity filters
All 18 gravity filters →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Culligan MaxClear Scout 2.25-Gallon | $175 | Lead · PFAS +3 | $382 | 5 years (limited) | 9.25/10 | Check price → |
| Santevia Gravity Water System | $179.99 | Brand claims only | $214 | 10 years (limited) | 9.25/10 | Check price → |
| ProOne Big+ 3-Gallon | $183.96 | Lead · PFAS +3 | $426 | 5 years (limited) | 9.25/10 | See specs → |
| Culligan MaxClear Venture 3-Gallon | $199 | Lead · PFAS +3 | $382 | 5 years (limited) | 9.25/10 | Check price → |
| Waterdrop King Tank 2.25-GallonTHIS MODEL | $199.99 | Brand claims only | $35 | 1 year | 8.75/10 | Check price → |