RainSoft UF22 Compatible RO Filter Kit - Membrane Sold Separately

1-Year Filter Replacement Kit for RainSoft UF22 Reverse Osmosis System (RO Membrane Sold Separately) INCLUDES: STAGE 1 - 1x Carbon Block Pre Filter (OMB934-5M) - Replace Every 12 Months STAGE 2 - 0x (RO Membrane TFC-RS9-22 Sold Separately or Included with Replacement Kit YSM-RSUF22) - Replace Every 24 Months STAGE 3 - 1x Carbon Block Post Filter (OMB934-5M) - Replace Every 12 Months 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. *Filters may need to be replaced more often than indicated depending on incoming water contaminant levels and volume of water being treated.