Watts F500398 3-Stage RO System
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.
- STAGE 1 - Carbon Block Pre-Filter (OMB934-5m) - Replace Every 12 Months
- STAGE 2 - RO Membrane 50 GPD (555694-00) - Replace Every 24 Months
- STAGE 3 - Carbon Block Post-Filter (OMB934-5m) - Replace Every 12 Months