Full side-by-side

WaterSource GEM 9000 Mfr claim · Xiaomi Mi Water Purifier Mfr claim
SpecWaterSource GEM 9000Xiaomi Mi Water PurifierWinner
OriginSingaporeChina—
DistributionDirect retail · Evergreen Group subsidiaryMi Stores · online · Lazada / Shopee—
CategoryHydrogen-rich alkaline + portableUnder-sink RO + app (NOT a true ionizer)—
Plates90WaterSource GEM 9000
pH (max alkaline)10.67.3WaterSource GEM 9000
ORP-700 mV-20 mVWaterSource GEM 9000
Dissolved H₂1.2 ppm0.01 ppmWaterSource GEM 9000
Flow rate2.5 L/min1.6 L/minWaterSource GEM 9000
Warranty2 yr1 yrWaterSource GEM 9000
Filter cost (each)S$ 220S$ 60Xiaomi Mi Water Purifier
Sticker priceS$ 4,999S$ 599Xiaomi Mi Water Purifier
5-year totalS$ 7,199S$ 1,499Xiaomi 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$ 5,700 over 5 years.

Lab performance: WaterSource GEM 9000 produces 1.2 ppm dissolved H₂; Xiaomi Mi Water Purifier produces 0.01 ppm. The WaterSource GEM 9000 leads on hydrogen output.

Warranty: WaterSource GEM 9000 carries a 2-year warranty; Xiaomi Mi Water Purifier carries 1. WaterSource GEM 9000 wins on coverage.

Where to buy + showroom info

WaterSource GEM 9000

Direct retail · Evergreen Group subsidiary

Showroom: 8 New Industrial Road #01-02/03, LHK3, Singapore 536200

Phone: +65 8860 6951 · Hotline +65 9325 6199

Lineup: GEM 9000 ($4,999) · GEM 9090NT ($3,999) · H001 ($2,888) · H2 Cap Plus ($365) · Alkalark ($199) · Alkaliser ($158)

Visit WaterSource (Evergreen Group) →

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.