This model has been discontinued
Aquasana no longer sells the AQ-4000 Countertop. Its current replacement is the Clean Water Machine.
Price on this page when written: $124.99 → Clean Water Machine: $399.99 (checked August 2026 — see live price)
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From Aquasana
Countertop Water Filter – Model # AQ-4000
Regular Price: $124.99
Aquasana’s patented dual cartridge drinking water filter installs in seconds on standard kitchen faucets and provides up to 30 gallons an hour of ultra-filtered, high-quality water for drinking, cooking and preparing beverages.
Package Contain
- Filter housing
- Chrome faucet diverter
- Twin filter cartridge set (lasts 6 months/filters 500 gallons)
- Easy-to-follow instructions.
Replacement filters cost $48.00 every 6 months/500 gallons, that’s less than 10¢ a gallon/$8.00 a month for a virtually unlimited supply of healthy water.
Replacement Filters for Aquasana Drinking Water Filters
Model # AQ-4025
Regular Price $59.99
Filters last 6 months/500 gallons.
Filters out lead, chlorine, VOCs, MTBE and chlorine resistant parasites/cysts.
Sub micron filtration.
How to Install Video