To Flush the Post carbon filter:
1. Remove the “out” tubing from the RO membrane.
2. Connect the source line directly to the tubing that is removed
from this fitting.
3. Then connect a drain line to the “out” fitting on the boost filter
location.
4. Note, if a boost filter will be used, please refrain from installing
the boost filter until after the “Post Carbon” filter is flushed.
5. Turn the water on and flush according to the instructions on
tubing back to the previously installed locations.
If installing a boost filter:
1. Prior to returning the tubing after step B, move the supply feed
and connect to the tubing from the “out” of the “post carbon”
filter head.
2. Leave the drain line connected to the “out” fitting on the top
of the “Boost” filter head.
3. Install the “Boost” filter in position and turn the water and
flush according to the instructions on the filter label.
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F i l t e r F l u s h i n g P r o c e d u r e s
Flushing the RO membrane for 30 minutes:
1. It is important to flush the RO membrane with all filters inline for a full 30 minutes. Although the RO membrane
will flush down to 98% reduction in TDS within 5-10 minutes, the remaining 20 minutes is necessary to completely
flush the preservative out of the membrane and to flush the higher TDS water out of the post filter.
a. Failure to complete this test, especially when using the “Boost” filter will result in poor taste and may
cause further damage to the equipment.
2. Connect the source line to the back of the system in the “tap water” bulkhead fitting.
3. Connect a drain line into the “RO drain” bulkhead fitting
a. This is represented with the black tubing with no tape color
4. Plug the power cord into active power.
a. Failure to do will result in the solenoid not engaging
and as a result no water will pass through the filters.
5. Keep the drain line connected to the “out” fitting from the
“Boost” filter head.
6. Turn the water on for 30 minutes.
a. For RO only systems, the TDS is .02% vs the tap water
TDS (98% reduction).
b. For Systems using Boost, the TDS is about 8-12 ppm higher
than the RO only variant.
8. If you have issues achieving these readings, make sure you
have 60-70 PSI feeding the system, the drain is not restricted
in any way including a reversed check valve, the inline flow
restrictor is in place and working properly and the unit is
properly flushed. Please contact technical support for
further assistance.
Manual de Servicio PW90 CT Página 11 de 25
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