Watts 415 Four-Stage RO System
Reverse Osmosis Systems
Watts 415 4-Stage RO Replacement Filters
This Watts system is a 4-stage system with two filter housings vertically and the membrane and post-filter mounted horizontally on top. Replace all filters except the membrane once a year. The membrane is replaced once every 2-3 years depending on your incoming water quality.
Replacement Filter Info
Helpful Filter Information
Not all filters have the same replacement schedule. Replace the RO membrane filter every two years. Replace all other filters every 6-12 months. Help keep your system sanitary by never using filters longer than 12 months, except the RO membrane filter, regardless of how much water you use.