Our AquaTru Under Sink purifier uses the same filters as our countertop units. They
Pre-Filter (yellow): 6 months or 600 gallons, whichever comes first
RO Filter (blue): 2 years or 1200 gallons, whichever comes first
VOC Filter (green): 1 year or 360 gallons, whichever comes first
pH + Mineral Boost VOC Alkaline Filter (green): 1 year or 360 gallons, whichever comes first.
How much do replacement filters cost?