water filter · Under-sink tankless RO systems

iSpring RO500AK Alkaline Reverse Osmosis System

Name: iSpring RO500AK Alkaline Reverse Osmosis System
Brand: iSpring
SKU: B09CHBC9CP

Quoted from the Amazon listing — confirm NSF/ANSI claim text on the live page before you buy. WaterVetted does not run lab tests.

Specs sourced from manufacturer listings · Certified vs claims labeled · WaterVetted does not run lab tests

Under-sink tankless RO systemsiSpringAmazon Associates

Install class

water filter

What to verify on the live listing

Exact model number and any NSF/ANSI claim text naming the contaminant you care about (42 taste/odor, 53 health claims such as lead, 58 for RO, 401 for named emerging compounds).
Current price, stock, and cartridge replacement interval — our recorded price is a dated snapshot (as of 2026-10-29).
We do not republish Amazon listing bullets or buyer reviews here. Open the retailer page for the current claim language and owner feedback. View current Amazon listing.

From the listing

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Size: the unit isn't small but doesn't take up that much space under the counter.
Capacity: 500 gallons
Material: Reverse Osmosis Membrane & Carbon Block + PP Composite Filter& Carbon Alkaline Filter
Flow Rate: 0.4 GPM
Brand Name: iSpring
Filter Type: PP+CTO RO Membrane Alkaline PP+CTO +Alkaline PP+CTO +RO+Alkaline