Stage 1
Omnipure K5605-JJ Inline Sediment Filter 5 Micron 2.5" x 12" - - Replace Every 12 Months
Stage 2
Omnipure K5633 GAC T33 Granular Carbon Inline Filter 2.5" x 12" - - Replace Every 12 Months
Stage 3
Vertex MH-4206 Encapsulated Reverse Osmosis Membrane 75 GPD - - Replace Every 24 Months
Stage 4
Omnipure K2533 GAC T33 Granular Carbon Inline Filter 2" x 10" - - Replace Every 12 Months