Ionics MicroMax 5500 Four Stage RO System


This 4 stage RO system uses sediment and GAC pre-filters to reduce chlorine, chlorine by-products and sediment before the membrane filters out impurities larger than .001 microns. The carbon block post filter treats for taste and odor. You can find and order all your filters at once in our replacement kits below.



  • STAGE 1 – Sediment Pre-Filter (47-55706G2 or CSM5651) – Replace Every 12 Months
  • STAGE 2 – Carbon Block Pre-Filter (47-9298G2 or CSM5621 or 3MROP412) – Replace Every 12 Months
  • STAGE 3 – RO Membrane TFC 36 GPD (66-4706G2 or CSM5672 or 3MROM413) – Replace Every 24 Months
  • STAGE 4 – Carbon GAC Post Filter (47-55704G2 or CSM5640) – Replace Every 12 Months