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 600 gallons, whichever comes first
If you purchased your unit before April 6, 2018, the replace filter alert may be inaccurate for the Pre/Carbon Filter (yellow), therefore, recommend replacing this filter whenever the RO and/or VOC filter is replaced.