Ninja HydraSense vs Waterdrop King Tank gravity filter (2.25 gal)
Only the Ninja HydraSense is certified to reduce PFAS, lead, chlorine and chloramine and 3 more. Verdict: the Ninja HydraSense for broader certified protection (7 vs 0 of the contaminants we track); the Waterdrop King Tank gravity filter (2.25 gal) if running cost matters more. Replacement filters and water for 2 people cost about $80 a year on the Ninja HydraSense and $3 on the Waterdrop King Tank gravity filter (2.25 gal); they cost $250 and $230 to buy.
| Ninja HydraSense | Waterdrop King Tank gravity filter (2.25 gal) | |
|---|---|---|
| Type | Countertop filter | Countertop filter |
| Price | $250 | $230 |
| Filters + water a year (2 people) | $80 | $3 |
| Filter cost per gallon (rated life) | 33¢ | 1.3¢ |
| Gallons per day | — | — |
| Pure to drain | — | — |
| Installation | none | none |
| PFAS | Certified | — |
| Lead | Certified | — |
| Chlorine | Certified | Brand test only |
| Chloramine | Certified | — |
| Fluoride | — | Brand test only |
| Mercury | Certified | — |
| Microplastics | Certified | — |
| VOCs | Certified | — |