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PRE-FILTER AND MINERAL ADDITION FLUSH AND TANK FILL (CONTINUED)
11. Turn on incoming feed water from source.
• Water will begin to fill RO processor and pre-filter.
Water will start to run to the drain.
• Pressure gauge will show an increased pressure.
• Check for any leaks. Shut off water and repair
leaks if required. Restart step 11.
12. Slowly open outlet valve (fully) until it is pointing
straight up. This will allow water to flush through the
optimized water outlet tube and reject line.
NOTE: Reject line will pulse from permeate pump.
This is normal.
13. Flush for five minutes or until water runs clear.
FILL TANK WITH WATER
NOTE: This action fills the tank for a 24 hour tank soak
and rinse.
14. Open tank valve
• Tank will begin filling with filtered water.
15. Close outlet valve.
16. Allow tank to fill.
• Tank fill time varies based on tank size.
• The permeate pump rate of "clicking" will
decrease as the tank nears full.
• When tank is full, the reject flow will stop.
17. Once tank is full, close tank valve.
REMOVE SYSTEM PRESSURE
18. Open outlet valve: rotate until pointing up.
19. Close inlet valve: rotate until pointing to right
• Optimized water outlet tube and reject tube
will exhaust the remaining water that is in the
processor.
20. Pressure should drop to 0 psi.
IMPORTANT: Bring pressure down to 0 psi before
attempting filter changes.
12 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE
Proof April 18, 2022
11
12
open
open
13
14
WAIT
15
16
closed
closed
17
18
19 19
20
FOODSERVICE.PENTAIR.COM
TWENTY-FOUR HOUR FLUSH AND SOAK
Turn blending valve fully closed.
1. Make sure system pressure is down to 0 psi.
2. Remove the membrane plug. Rotate left and pull
down.
3. Store plug under system cover for future use.
4. Install supplied RO membrane cartridge (EZ-200 or
EZ-375) into the farthest right position.
5. Open inlet valve: Rotate until pointing down.
• Water will begin to fill the RO processor.
• Water will start to run out reject and outlet tubes.
• Ensure both lines are secure with water flowing
to drain.
6. Flush the system for one hour.
After one hour close the reject flush valve.
It's the side middle blue handle.
Closed = pointing left.
Turn Blending Valve fully closed by rotating knob
clockwise until it stops.
7. Continue to Flush for another 23 Hours.
8. Recommended: Using a graduated cylinder, record
the optimized water flow and reject flow in ounces/
min. or ml/min.
Fill the graduated cylinder for one minute for each.
Record the values here:
Optimized water__________________ Oz or ml_____ /min
Reject water______________________ Oz or ml_____ /min
NOTE: Reject water volume in one minute may exceed
32 oz. / 1,000 ml. If so, use a larger container, or collect
samples in multiple containers and add all of the
collected volumes together.
PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE
Proof April 18, 2022
remove
remove
plug
plug
1
2
membrane
membrane
cartridge in
cartridge in
3
4
blending
valve
reject
flush
5
6
valve
23
HOURS
7
8
FOODSERVICE.PENTAIR.COM | 13
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