Watts WP-4, WP4-50, KP-4, RO-4M RO System
Reverse Osmosis Systems
Watts WP-4, WP4-50, KP-4, RO-4M RO Replacement Filters
This 4 stage RO system use sediment and carbon block pre-filters to reduce sediment, chlorine and chlorine by-products before the membrane filters out impurities larger than .001 microns. The carbon block post filter treats for taste and odor.
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.