Full side-by-side
3M Under-Sink Filter Systems Mfr claim
·
Doulton Ceramic Filter Mfr claim
| Spec | 3M Under-Sink Filter Systems | Doulton Ceramic Filter | Winner |
|---|---|---|---|
| Origin | USA | UK | — |
| Distribution | Retail · home renovation channels | Retail · specialty water shops | — |
| Category | Under-sink filter system (NOT a true ionizer) | Ceramic under-sink filter (NOT a true ionizer) | — |
| Plates | 0 | 0 | Tie |
| pH (max alkaline) | 7.4 | 7.4 | Tie |
| ORP | -30 mV | -40 mV | Doulton Ceramic Filter |
| Dissolved H₂ | 0.01 ppm | 0.01 ppm | Tie |
| Flow rate | 2.5 L/min | 1.8 L/min | 3M Under-Sink Filter Systems |
| Warranty | 1 yr | 1 yr | Tie |
| Filter cost (each) | S$ 220 | S$ 95 | Doulton Ceramic Filter |
| Sticker price | S$ 450 | S$ 320 | Doulton Ceramic Filter |
| 5-year total | S$ 1,550 | S$ 1,270 | Doulton Ceramic Filter |
| Our rating | — | — | — |
How we sourced these numbers: All specs are taken directly from each manufacturer's published product page (links at the bottom). We have NOT independently lab-tested these brands — only Prime Water (our own sister brand) is verifiable through primewater.com.sg. Independent lab testing is rolling out through 2026.
Verdict
Cost over 5 years: Doulton Ceramic Filter saves S$ 280 over 5 years.
Lab performance: 3M Under-Sink Filter Systems produces 0.01 ppm dissolved H₂; Doulton Ceramic Filter produces 0.01 ppm. Effectively tied on hydrogen.
Warranty: 3M Under-Sink Filter Systems carries a 1-year warranty; Doulton Ceramic Filter carries 1. Same warranty length.
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 →Doulton Ceramic Filter
Retail · specialty water shops
Lineup: HIP3 · HCS · HCP · countertop and under-sink ceramic systems
Visit Doulton →No affiliate links · Waterionizer.sg earns zero from either purchase.