This our replacement reverse osmosis filter set for the Millennium MRO-35 Reverse Osmosis System. Your reverse osmosis filter sets should be changed once per year.
Filter set includes:
S7128 Carbon Block Prefilter
S7125 GAC Carbon filter
S7206W-JG Inline Post Filter
Optional S1448RS RO Reverse Osmosis Membrane
Set should be changed every 12 months. The replacement membrane is not included in the set (it can be added as an option) and should be replaced every 3 years