Full side-by-side
| Spec | 3M Under-Sink Filter Systems | Coral Premium 9 | Winner |
|---|---|---|---|
| Origin | USA | Singapore | — |
| Distribution | Retail · home renovation channels | Direct retail | — |
| Category | Under-sink filter system (NOT a true ionizer) | Hydrogen water + multi-stage filter | — |
| Plates | 0 | 9 | Coral Premium 9 |
| pH (max alkaline) | 7.4 | 8.3 | Coral Premium 9 |
| ORP | -30 mV | -120 mV | Coral Premium 9 |
| Dissolved H₂ | 0.01 ppm | 0.1 ppm | Coral Premium 9 |
| Flow rate | 2.5 L/min | 2.2 L/min | 3M Under-Sink Filter Systems |
| Warranty | 1 yr | 2 yr | Coral Premium 9 |
| Filter cost (each) | S$ 220 | S$ 160 | Coral Premium 9 |
| Sticker price | S$ 450 | S$ 2,968 | 3M Under-Sink Filter Systems |
| 5-year total | S$ 1,550 | S$ 4,568 | 3M Under-Sink Filter Systems |
| Our rating | — | — | — |
Verdict
Cost over 5 years: 3M Under-Sink Filter Systems saves S$ 3,018 over 5 years.
Lab performance: 3M Under-Sink Filter Systems produces 0.01 ppm dissolved H₂; Coral Premium 9 produces 0.1 ppm. The Coral Premium 9 leads on hydrogen output.
Warranty: 3M Under-Sink Filter Systems carries a 1-year warranty; Coral Premium 9 carries 2. Coral Premium 9 wins on coverage.
Where to buy + showroom info
3M Under-Sink Filter Systems
Retail · home renovation channels
Lineup: AP Easy Complete · AP2-C405-G · HCD-2 · Aqua-Pure
Visit 3M Singapore →Coral Premium 9
Direct retail
Showroom: Block 37 Defu Lane 10 #03-41, Singapore 539214
Phone: +65 6239 5335 · Sales +65 8761 6868
Lineup: Premium 9 Slim ($3,413) · 9 H Plus ($4,949) · 9 Compact ($3,168) · 9 H ($2,968) · 7 ($1,968) · 5 ($1,688) · 4 ($949)
Visit Coral Pure Natural Pte Ltd →No affiliate links · Waterionizer.sg earns zero from either purchase.