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Step 4: Install the Vertical Filters: Stages 1, 2, and 3
4.1 Make sure that the O-ring is seated inside the
groove at the top of the filter housing. Food-
grade silicon jelly may be used to help the
O-ring stay in place and seal better.
4.2 Filter cartridges are preserved in shrink wrap.
Take note of the direction sign on the sticker
before removing the wrap (GAC stage).
4.3 When placing the filter cartridge into its
housing, make sure it is centered and the
knob protruding from the bottom of the
housing fits in the central hole of the filter.
4.4 Screw the housing, with filters attached, onto
the housing caps (caps are pre-assembled on
the machine head). The cap also has a center
knob which should be inserted into the
center hole of the filter cartridge. Twist the
housing on in a clockwise direction by hand, and then use a housing wrench to tighten it up
for about 1/4 – 1/2 turn. Do not over tighten. This can cause leaks and make it difficult
to unscrew the housing when replacing filters.
4.5 Follow the steps 4.1 – 4.4 to install the GAC and CTO filters. *Note* the second stage GAC
is the only filter that must go in a certain direction. Make sure that the end with the rubber
washer faces up, thereby attaching to the housing cap.
Step 5: Install Tank Shut-off Valve (Optional)
5.1 Optionally this RO system can be used with a 20 – 200 gallons storage tank. A tank helps
meet the impulsive high volume demand and build a commercial or whole house Reverse
Osmosis solution.
5.2 Wrap 10 - 15 turns of Teflon tape clockwise (looking from top) onto the metal thread at the
top of the tank.
5.3 Screw (clockwise) the Tank Shut-off Valve on and tighten up by hand. Do not over tighten.
5.4 An extra Tee fitting is needed for connecting the 5
th
stage, tank and filtered water faucet.
Step 6: Install Reverse Osmosis Membrane
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