Specifications

20
Maintenance
PREFILTER/POSTFILTER MAINTENANCE
NOTE: It is recommended to replace the battery,
prefilter and postfilter cartridges at least every 6
months of product water use. Replace more often if
they begin to plug with sediments.
The prefilter and postfilter are replaceable sediment
cartridges with activated carbon in its composition. See
Fig. 26. You must periodically replace the prefilter and
postfilter cartridge. This will protect the RO membrane
from being destroyed by chlorine. It will also prevent
the filters from plugging with sediments.
You may notice a slower output of product water as the
prefilter and postfilters build up with sediments.
Replace the prefilter and postfilter cartridges when this
occurs. You should replace the battery whenever you
replace the cartridges.
RO MEMBRANE CARTRIDGE MAINTENANCE
The Reverse Osmosis cartridge is a tightly wound spe-
cial membrane. See Fig. 26.The membrane removes
the dissolved
solids and organic matter. The life of the
Reverse Osmosis membrane cartridge depends mostly
on the pH of the supply water. (see specifications).
Cartridge life is shorter with higher pH. For example, if
supply water pH is from 6.8 to 7.7, the cartridge may
last for well over one year. However, cartridge life may
be as short as 6 months if the pH is as high as 8.5 to
10. Higher pH weakens the cartridge membrane and
causes pin-hole leaks. It's time to replace the Reverse
Osmosis cartridge when the production rate and/or
quality of product water drops. Product water may
begin to taste different or bad, indicating solids and
organics are passing through the Reverse Osmosis
membrane. See Reverse Osmosis cartridge replace-
ment.
REVERSE OSMOSIS CARTRIDGE REPLACEMENT
Complete the following steps to replace the cartridges.
1. Remove (turn to the left) the pre filter cartridge from
the filter head to relieve pressure on the Reverse
Osmosis cartridge.
2. Remove the Reverse Osmosis cartridge.
3. Remove the post filter cartridge.
4. Discard the cartridges in a proper manner.
5. Install new cartridges in reverse order (post filter,
Reverse Osmosis and then prefilter). Turn cartridges
to the right to re-attach to the filter heads.
6. Remove and replace the timer battery. See Fig. 14.
7. Purge the Reverse Osmosis membrane cartridge.
See page 17 for instructions.
PREFILTER/POSTFILTER CARTRIDGE
REPLACEMENT
Complete the following steps to replace the cartridges.
1. Remove the pre filter cartridge (turn to the left) from
the filter head. Then remove the post filter cartridge.
2. Discard the cartridges in a proper manner.
3. Install new cartridges in reverse order (post filter
first, then pre filter). Turn cartridges to the right to re-
attach to the filter heads.
4. Remove and replace the timer battery. See Fig. 14.
5. Purge the Reverse Osmosis membrane cartridge.
See page 17 for instructions.
Prefilter
Cartridge
RO Cartridge
Postfilter
Cartridge
Cover
Questions? Visit www.whirlpool.com or call Toll Free 1-866-986-3223
FIG. 26
Turn to the left to
remove