11
1. Close the cold water supply valve. Open the faucet and completely drain until the flow of
water stops. Remove the filter housings with the housing wrench and discard the old filter
cartridges. Thoroughly clean the inside of the housing bowls with soap and water. Rinse
completely. If the RO has been installed with a water supply that does not contain chlorine,
put 2 fluid ounces (60 ml) of common household chlorine bleach such as Javex in the clear
housing. Reassemble filter housings WITHOUT cartridges.
2.
Sani-Purge Procedure:
Turn the RO faucet off. Turn the blue-handled Sani-purge valve
(Figure 3.) to the ON position. Open the raw water supply saddle valve. The RO unit and
tank will now fill with raw, chlorinated water. Allow the system to stand for 1 hour.
Figure 4.
Sani-purge valve (shown in closed
position)
3. Turn the cold water supply valve OFF. Open the faucet and allow the system to completely
drain. Turn the blue Sani-purge valve OFF. They system has now been Sani-purged and
is ready to load the new cartridges.
4. To load the cartridges, repeat Step 9 (3) or (4) from the installation instructions above.
Turn the raw water supply valve ON. Allow the storage tank to fill and then drain it
completely and refill again before resuming use of the water system.
NOTE:
The Sani-purge procedure does not expose the membrane element to chlorinated water
long enough to cause deterioration of the thin film and may be done safely with the membrane
element in place.
Changing the Reverse Osmosis Membrane
The membrane element will require changing much less frequently than the filter cartridges and
only when failure is indicated. This should be done when water production begins to noticeably
fall, or TDS readings in the product water begin to rise.
T
otal
D
issolved
S
olids may be measured
by a professional or by use of a simple hand-held TDS monitor. These are available from your
dealer or from Waterite’s Online Store at www.waterite.com.
Pocket TDS meter
The membrane element life will range from 1 to 5 years, depending on the quality of the raw water.
Soft water free from iron is ideal. Hardness, iron, chlorine and infrequently changed filter
cartridges are the membrane’s greatest enemies.
