3M Aqua-Pure (Solventum) AP903 whole-house vs iSpring WGB21B 2-stage whole-house
Only the 3M Aqua-Pure (Solventum) AP903 whole-house is certified to reduce chlorine. Verdict: the 3M Aqua-Pure (Solventum) AP903 whole-house for broader certified protection (1 vs 0 of the contaminants we track).
| 3M Aqua-Pure (Solventum) AP903 whole-house | iSpring WGB21B 2-stage whole-house | |
|---|---|---|
| Type | Whole-house | Whole-house |
| Price | — | $183 |
| Filters + water a year (2 people) | — | $116 |
| Filter cost per gallon (rated life) | — | 0.1¢ |
| Gallons per day | — | — |
| Pure to drain | — | — |
| Installation | plumber | plumber |
| Chlorine | Certified | Brand test only |