Stage 1
Omnipure CSM5651 Sediment/Carbon Filter - Water Factory 3M Compatible - - Replace Every 12 Months
Stage 2
Omnipure CSM5672 RO Membrane 50 GPD - Water Factory 3M Compatible - - Replace Every 24 Months
Stage 3
Omnipure CSM5621 Carbon Block Filter - Water Factory 3M Compatible - - Replace Every 12 Months