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7.3 Connect the Flow Restrictor (point C), which is a 3-inch long cylinder with a FLOW sign
laying besides the membrane housing, to the Drain Saddle (point D) with the White tubing.
7.4 On the right side of the Post Carbon Filter (FT15 5
and the Tank Valve (point F) with the YELLOW tubing. The tank is pre-pressurized at 7-10
psi and has an air valve on the side for refilling with a bike air pump if needed.
7.5 On the left end of FT15, insert the
7.6 Connect the other end of the
7.7 You may organize the tubing, but make sure to leave enough length so the filter system can be
moved freely in and out of the cabinet when replacing filters.
7.8 You may hang the system using two 3.9mm x 25mm
screws with plastic anchors. This will prevent tipping and
make replacing filter cartridges easier. Note: Use anchors
on to mount on dry wall only. If you plan on
mounting/hanging the system, it is highly recommended
to include supports under each of the bottom three
housings. Supports under the housings will take the water
weight off the housing threads, and ensure the thread strength does not decay over the years.
Step 8: System Start Up
8.1 Make sure that no tubings are kinked. Turn Tank Shut-off Valve OFF (perpendicular to the
yellow tubing). Place a towel under the system to catch any possible water leak.
8.2 To prevent any residual carbon dust in the first three stages from getting into the RO
membrane, the tubing to the inlet of the RO membrane housing cap was left disconnected
previously. Flush the first three stages into a bucket until the water turns clear, and re-connect
the tubing to the RO membrane. (You may do this whenever you change the first three stages).
8.3 Turn on (inline) Feed Water Adapter valve (AFW), and then slowly turn on the Cold Water
Supply Valve (CWSV) and check for leaks. The top 3 causes of leaks are 1) the tubing was not
fully inserted into the quick-connect fitting for about half an inch deep. 2) the O-ring was not in
place or kinked. 3) the Housing/Cap was not tightened properly or misaligned with the threads.
8.4 Within 5 minutes, RO water should start dripping. Let it run for at least 10 minutes. This
flushes the system except for the tank. The water may appear black due to loose carbon from
new carbon filters (step 8.2 could be taken to expedite the flush). It will turn clear with some air
bubbles.
8.5 Shut off the RO Drinking Faucet. Turn on the Tank Shut-off Valve. Wait for the tank to fill up.
It may take 1.5 hours in warm summer or 3 hours in cold winter to fill up a 3 gallon tank with
about 2 gallons holding capacity.
8.6 After two hours, turn on the RO Drinking Faucet to flush out all the water in the tank. DO NOT
use the first tank of water. The water out of the faucet should be a much stronger stream since
the water pressure was built up to 35-40 psi when the tank is filled up. When the water flow
changes back to a trickle, it means the tank is empty.
8.7 The reverse osmosis membrane is the key component for the effective reduction of total
dissolved solids (TDS). The water shall be tested periodically to verify that the system is
performing properly. If the TDS of the source water is 100ppm, the RO water should be less
than 10ppm (Rejection rate >90%).
Page 10
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tubing to the RO faucet.
www.purifiltration.com
th
stage), connect the Tee-fitting (point E)
tubing (connects to RO faucet) into the elbow fitting.
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support@purifiltration.com
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