Full side-by-side
| Spec | Prime Water | Xiaomi Mi Water Purifier | Winner |
|---|---|---|---|
| Origin | Korea | China | — |
| Distribution | Sole authorised distributor | Mi Stores · online · Lazada / Shopee | — |
| Category | Alkaline ionizer | Under-sink RO + app (NOT a true ionizer) | — |
| Plates | 9 | 0 | Prime Water |
| pH (max alkaline) | 11.0 | 7.3 | Prime Water |
| ORP | -728 mV | -20 mV | Prime Water |
| Dissolved H₂ | 1.34 ppm | 0.01 ppm | Prime Water |
| Flow rate | 4.0 L/min | 1.6 L/min | Prime Water |
| Warranty | 5 yr | 1 yr | Prime Water |
| Filter cost (each) | S$ 160 | S$ 60 | Xiaomi Mi Water Purifier |
| Sticker price | S$ 2,800 / S$ 99/mo | S$ 599 | Xiaomi Mi Water Purifier |
| 5-year total | S$ 5,940 | S$ 1,499 | Xiaomi Mi Water Purifier |
| Our rating | 4.7/5 | — | — |
Verdict
Cost over 5 years: Xiaomi Mi Water Purifier saves S$ 4,441 over 5 years.
Lab performance: Prime Water produces 1.34 ppm dissolved H₂; Xiaomi Mi Water Purifier produces 0.01 ppm. The Prime Water leads on hydrogen output.
Warranty: Prime Water carries a 5-year warranty; Xiaomi Mi Water Purifier carries 1. Prime Water wins on coverage.
What we recommend: Prime Water (Sole-distributor Korean ionizer, 5-year warranty, no MLM markup). We disclose owning this brand — the numbers above support the verdict, you can replicate any of them with the published methodology.
Where to buy + showroom info
Prime Water
Sole authorised distributor
Showroom: Singapore · by appointment via primewater.com.sg
Lineup: L Series · R Series · LV Series · RV Series
Visit Prime Water →Read our full review →
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.