North Star NSRO42C4 Installation And Operation Manual page 19

How Your RO Water System Works
Air Gap
DRAIN WATER
AUTOMATIC
SHUTOFF
WATER
IN
GREEN
PREFILTER
5
RED
Water Flow Description
1. Water enters prefilter. Sand, silt and other sediments are reduced. Chlorine is also reduced. See Fig. 27.
2. Water leaves prefilter and proceeds to the Reverse Osmosis Cartridge.
3. Water enters the Reverse Osmosis membrane. Dissolved solids are reduced.
4. Processed water leaves the Reverse Osmosis Membrane and flows to the storage tank.
5. Drain water with dissolved solids leaves the Reverse Osmosis membrane and flows to the drain.
6. Faucet is activated.
7. Processed water leaves the storage tank and flows to the postfilter, where it is filtered to ensure fresh taste.
8. Water flows to the Reverse Osmosis faucet.
PRODUCT WATER
Gravity
Drain
Drain Flow
Control
1
RO
MEMBRANE
2
Reverse Osmosis Water Flow Schematic
PRODUCT
WATER FAUCET
6
Check
Valve
8
BLUE
POSTFILTER
3
YELLOW
19
PRODUCT
WATER
STORAGE
7
4
FIG. 27