Rainsoft 9591 Four Stage RO System

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We carry quality generic replacement filters and filter replacement bundles for the Rainsoft 9591 RO System. The Rainsoft 4 stage 9591 RO system featured a 5 micron polyspun sediment pre-filter, a 5 micron carbon block filter, a 12 GPD TFC membrane, and a 5 micron granular activated carbon inline post filter. The Rainsoft 9591 Four-Stage Reverse Osmosis System uses sediment and carbon block pre-filters to reduce sediment, chlorine, and chlorine by-products before the RO membrane filters out impurities larger than .001 microns. The Granular Activated Carbon (GAC) post filter treats for taste and odor.

 

Note: If your Rainsoft reverse osmosis system is from 2013 or newer, it most likely is the Ultrefiner II. The Ultrefiner II requires proprietary filters that must be purchased from a Rainsoft dealer. Conversion kits to generic non-OEM replacement filters are available.

 

STAGES

  • STAGE 1 – Sediment Pre-Filter (93023 - Rainsoft Part#: 9547 or 9747) – Replace Every 12 Months
  • STAGE 2 – Carbon Block Pre-Filter (OMB934-5m - Rainsoft Part#: 18557 or 9557) – Replace Every 12 Months
  • STAGE 3 – DISCONTINUED - RO Membrane TFC 12 GPD (TFC-RS9-12 - Rainsoft Part#: 12447, 9565, 9594, 9772, 13016 or M-T1810R12) – Replace Every 24 Months - Recommend converting system with the 5EZ50-RK for continued use
  • STAGE 4 – Inline Carbon GAC Post Filter (CL6ROT33BB - Rainsoft Part#: 9798) – Replace Every 12 Months