Watts F500398 3-Stage RO System

Reverse Osmosis Systems

Watts F500398 3-Stage RO Replacement Filters

This Watts 3-stage system, model F500398, is a traditional RO unit with innovative half-turn filter housings. The system is designed for undersink use and has industry standard cartridges. See below for all replacement filters and parts.

Replacement Filter Info

Carbon Block Filter (OMB934-5m) - Replace every 6-12 months

RO Membrane TFC 50 GPD (555694-00) – Replace every 24 months

Carbon Block Filter (OMB934-5m) – Replace every 6-12 months

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.