©2012 OMNIFILTER • Printed in U.S.A. 247159 AP12 Rev B
WHEN TO CHANGE THE CARTRIDGES
The life of the cartridge depends on the water volume used and the
substances in the water. Normally, cartridges should be changed
at intervals of 6 months. Replace the cartridge sooner if the water
pressure at the faucet begins to drop noticeably or if you notice
changes in the taste, color, or ow of the ltered water.
CHANGING THE CARTRIDGES
Materials Needed
•Replacement Cartridges:
R1200/R1500 US1750 US2000 RO4000
First
cartridge 1500R 1750R 1750R 1500R
Second
Cartridge None None 1250R OM4
Third
Cartridge None None None 1250R
The pre-lter and post-lter cartridges need to be changed when the
water pressure at the faucet begins to drop noticeably, or if there are
changes in taste, color or ow of the ltered water. All cartridges
should be changed at the same time.
1. Changing the Cartridges
NOTE: Only the replacement cartridges listed can be used with the
systems. Failure to use recommended replacement cartridges will
void your warranty.
A) Place a small pan or towel under the system to catch any water
that may drip.
B) Twist the pre-lter cartridge (on the left side of the lter housing)
counter-clockwise for a 1/4 of a turn, and pull the cartridge out of
the system.
C) Push the new cartridge into the head until it can go no further.
D) Twist the cartridge 1/4 turn clockwise until it stops rotating. The
cartridge is properly installed when the cartridge label is facing to
the front.
E) Gently pull the cartridge straight out to ensure the cartridge is
locked into place.
F) Repeat for all other cartridges.
G) Turn on water and check for leaks. If leaks are found, see
Troubleshooting in the RO4000 Installation Instruction Manual.
NOTE: The post lter cartridge may contain carbon nes (very ne
black powder). This will be released during your initial ushing.
H) Flush water through lter for 10 minutes to remove carbon nes.
Check for leaks again before leaving installation.
I) Allow the tank to ll.
2. Flushing the Reverse Osmosis Filter
NOTE: The RO4000 system does not produce a high volume of
water on demand as an ordinary lter does. Water is produced at
a slow, drop-by-drop rate. The system requires about 3 hours to
ll the storage tank. As water is taken from the tank, the system
automatically starts the cycle of replacing the water and then stops
water production when the tank is full.
A) Make sure system faucet is off.
B) Make sure tank valve is in the open position.
C) Slowly turn on cold water supply.
D) Open the faucet to turn on ow. Let the faucet run/drip for 12
hours then close it.
E) Allow 3 hours for the tank to ll. Continue to periodically check
the installation for leaks. After the storage tank is lled, open the
faucet to ush the post-lter cartridge (on the right side of the
lter housing). Allow 4 to 5 minutes for all of the water to drain
from the tank. Close faucet and allow tank to ll.
CAUTION Visually check the entire system for leaks. If a leak is
present, see Troubleshooting in the product manual.
F) Repeat step E four times.
