Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.
APEC ROES-50 comes out ahead by a narrow margin (4.6 vs 4.5). The gap is mostly about long-term users who run RO for 10+ years and want lowest yearly cost — read the strengths below before deciding.
The ROES-50 is the budget RO pick — APEC's 5-stage system with the lowest annual filter cost.
The D6 is the value tankless pick — Waterdrop's compact tankless RO at $349. Best for buyers wanting tankless without G3P800 premium.
Cheapest filter cost. USA-made. No alkaline.
Cheaper tankless. Lower GPD than G3P800. Compact.
| Spec | APEC ROES-50 | Waterdrop D6 Tankless |
|---|---|---|
| Stages | 5 | — |
| Origin | USA | — |
| Filter Cost | ~$75/yr | — |
| Warranty | 2-year | — |
| Type | — | Tankless RO |
| GPD | — | 600 |
| Faucet | — | TDS display |
| Power | — | Electrical required |