i12 Manual Page 28 - Revision: 6-13-2023
7. Remove the Pre-Carbon filter and install the Post-Carbon Filter into Filter Head #1 (see
below). This part is very important: Disconnect the flush tube from the front of the
manifold, then disconnect the water supply line running into the left side of the
manifold. Now reinstall these tubes in the opposite ports they were removed from.
The water supply should plug into the front port, and the drain line (running to a
bucket) should be plugged into the left port. This will allow you to “reverse flush” the
Post-Carbon. With the flush tube still running to drain, open the ¼-turn valve and allow
water to flush the filter for 3 min. Once complete, shut the ¼-turn valve off.
8. With the ¼-turn valve shut off, remove the flush line from the manifold and return the
water supply to the left side port. Return all filters to their original position. Ensure all
filters retained both black o-rings and firmly tighten. Return the white tube to the front
port of the manifold.
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