iSpring RO500AK-ORB Under-Sink RO System
Tankless under-sink reverse osmosis system with 500 GPD and remineralization. NSF 58 certified, reduced wastewater with a 2:1 pure-to-drain ratio. Customer feedback cites easy installation and good-tasting water
Highlights
- high 500 GPD output
- tankless RO with remineralization
- low wastewater ratio (2:1)
Pros
- NSF 58 certified
- 500 GPD fast water flow
- tankless design
- remineralization for natural pH
- easy filter changes
Cons
- mixed reports on flow rate
- some users experience unit stopping after a couple months
Best For
Features
- NSF 58 certification for TDS reduction with QR code access to official report
- Tankless RO design reduces under-sink space usage by up to 70%
- US/US-appropriate flow: up to 500 GPD with 0.4 GPM flow rate
- 2:1 pure-to-drain ratio minimizes wastewater and supports efficiency
- Natural pH remineralization provided by the system
