STAGES: STAGE 1 - Sediment/Carbon Pre-Filter (S7028) - Replace Every 12 Months STAGE 2 - RO Membrane 50 GPD (S1229RS) - Replace Every 24 Months STAGE 3 - GAC Post-Filter (S7025) - Replace Every 12 Months The Marlo TFC-35 RO system is an obsolete system that filters your water in 3 stages. Sediment, chlorine, taste and odor are reduced by the sediment and carbon filters, and impurities larger than .001 microns are filtered out by the CTA RO membrane.

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