Ionics GI1 Three Stage RO System


The Ionics GI1 3 stage RO system uses filters from 3M with a pre-filter 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) – Replace Every 12 Months
  • STAGE 2 – RO Membrane TFC 36 GPD (66-4706G2 or 3MROM413) – Replace Every 24 Months
  • STAGE 3 – Carbon Block Post Filter (47-55710G2) – Replace Every 12 Months