Comparison : Item # E2-2, Culligan® E2 Series 2.8 Gallons Per Minute (gpm) Nominal Capacity Reverse Osmosis System
Item # E2-3, Culligan® E2 Series 4 Gallons Per Minute (gpm) Nominal Capacity Reverse Osmosis System
Item # E2-4, Culligan® E2 Series 5.2 Gallons Per Minute (gpm) Nominal Capacity Reverse Osmosis System
Item # E2-5, Culligan® E2 Series 6.3 Gallons Per Minute (gpm) Nominal Capacity Reverse Osmosis System
Item # E2-6, Culligan® E2 Series 6.9 Gallons Per Minute (gpm) Nominal Capacity Reverse Osmosis System