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User Manual of Product 1: APEC Water Systems FILTER-SET-PH water filter replacement, User Manual of Product 2: APEC 5-TCR-QC US MADE 10" Inline Carbon Filter with ¼” Quick Connect For Reverse Osmosis Water Filter System (For Standard System)
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APEC RO-PH90 System Filter Change Instruction Changing Stages-1, 2, 3 Pre-Filters: (should be changed at least every 6-12 months) Turn OFF cold water supply to RO system. Turn OFF the tank ball valve. Turn on RO faucet lever briefly to relieve the built- up pressure inside the RO system.
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