Full side-by-side
3M Under-Sink Filter Systems Mfr claim
·
Xiaomi Mi Water Purifier Mfr claim
| Spec | 3M Under-Sink Filter Systems | Xiaomi Mi Water Purifier | Winner |
|---|---|---|---|
| Origin | USA | China | — |
| Distribution | Retail · home renovation channels | Mi Stores · online · Lazada / Shopee | — |
| Category | Under-sink filter system (NOT a true ionizer) | Under-sink RO + app (NOT a true ionizer) | — |
| Plates | 0 | 0 | Tie |
| pH (max alkaline) | 7.4 | 7.3 | 3M Under-Sink Filter Systems |
| ORP | -30 mV | -20 mV | 3M Under-Sink Filter Systems |
| Dissolved H₂ | 0.01 ppm | 0.01 ppm | Tie |
| Flow rate | 2.5 L/min | 1.6 L/min | 3M Under-Sink Filter Systems |
| Warranty | 1 yr | 1 yr | Tie |
| Filter cost (each) | S$ 220 | S$ 60 | Xiaomi Mi Water Purifier |
| Sticker price | S$ 450 | S$ 599 | 3M Under-Sink Filter Systems |
| 5-year total | S$ 1,550 | S$ 1,499 | Xiaomi Mi Water Purifier |
| 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: Xiaomi Mi Water Purifier saves S$ 51 over 5 years.
Lab performance: 3M Under-Sink Filter Systems produces 0.01 ppm dissolved H₂; Xiaomi Mi Water Purifier produces 0.01 ppm. Effectively tied on hydrogen.
Warranty: 3M Under-Sink Filter Systems carries a 1-year warranty; Xiaomi Mi Water Purifier 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 →Xiaomi Mi Water Purifier
Mi Stores · online · Lazada / Shopee
Lineup: Mi Water Purifier 600G · 500G · 400G · countertop variants
Visit Xiaomi →No affiliate links · Waterionizer.sg earns zero from either purchase.