How much do the filters cost? November 23, 2019 07:30 Updated Follow The Dual Function Pre/Carbon Filter is $19.95 The Reverse Osmosis filter is $49.95 The VOC Carbon filter is $29.95. Related articles How often do I need to change my filters? How long do the filters last in AquaTru countertop purifiers? Can AquaTru filter well water? How do I descale my AquaTru or AquaTru Connect? Does Aquatru Connect use the same filters as the original AquaTru?