Xiaomi's Mi Water Purifier 600G is an under-sink RO system with smartphone app monitoring of filter life. Aggressively priced (~S$599) and available through Mi Stores / Lazada / Shopee. Same category framing: RO filtration, not alkaline ionization.
Cheapest smart under-sink RO at S$599 · app-monitored filter life · NOT an alkaline ionizer.
- Mi Water Purifier 600G500G400G · countertop variants
- Cheapest under-sink RO in SG at S$599
- Smart-home integration — app monitors filter life
- Cheap cartridges (~S$60)
- Direct purchase, no rental lock-in
- NOT an alkaline ionizer
- RO strips minerals
- 1-year warranty is short
- Minimal SG service
Source: manufacturer's public site · cited at the bottom of this page.
See all 36 brands' battle cards →What the brand gets right · what it doesn't
Pros
- Cheapest under-sink RO in SG (~S$599)
- Smart-home integration · app monitors filter life
- Compact design · easier under-sink fit than legacy RO
- Filter cartridges are cheap (~S$60)
- Direct purchase, no rental lock-in
Cons
- NOT an alkaline ionizer
- RO removes minerals (some buyers see this as a negative)
- 1-year warranty is short
- Service network in SG is minimal (Mi Stores)
- Tech-savvy install assumed
Manufacturer-claimed specs
- Type
- Under-sink RO + app (NOT a true ionizer)
- pH at highest setting
- ~7.3
- ORP
- ~-20 mV
- Dissolved H₂
- ~0.01 ppm
- Flow rate
- ~1.6 L/min
- Warranty
- 1 years
Available models
Mi Water Purifier 600G · 500G · 400G · countertop variants
Who this brand is for
- Tech-savvy buyers comfortable with Xiaomi ecosystem
- Renters / homeowners wanting cheap RO under-sink
- Budget buyers under S$700
Who should look elsewhere
- You want alkaline ionized water
- You want a hot/cold dispenser
- You want established SG service network
5-year cost
- Unit
- ~S$ 599
- Installation
- ~S$ 150
- Filters (15× ~S$60)
- S$ 900
- 5-year total
- ~S$ 1,649 · ≈ S$ 0.90 / day
How to buy
- Company
- Xiaomi
- Website
- www.mi.com/sg
Footnotes
- Data source: www.mi.com/sg (verified May 2026)
- Conflict declared: Operated by Prime Water Singapore — competitor brand.
- No affiliate link.
