A. O. Smith Direct Flow RO AOS-DFRO800 vs Waterdrop G3P800
Only the Waterdrop G3P800 is certified to reduce PFAS, lead, chlorine and fluoride. Verdict: the Waterdrop G3P800 for broader certified protection (5 vs 1 of the contaminants we track). Replacement filters and water for 2 people cost about $292 a year on the A. O. Smith Direct Flow RO AOS-DFRO800 and $161 on the Waterdrop G3P800; they cost $575 and $999 to buy.
| A. O. Smith Direct Flow RO AOS-DFRO800 | Waterdrop G3P800 | |
|---|---|---|
| Type | Under-sink reverse osmosis | Under-sink reverse osmosis |
| Price | $575 | $999 |
| Filters + water a year (2 people) | $292 | $161 |
| Filter cost per gallon (rated life) | 40¢ | 13¢ |
| Gallons per day | 800 | 800 |
| Pure to drain | 1.78:1 | 3:1 |
| Installation | diy | diy |
| PFAS | — | Certified |
| Lead | — | Certified |
| Chlorine | Brand test only | Certified |
| Fluoride | — | Certified |
| VOCs | — | Brand test only |
| TDS | Certified | Certified |