Maintenance Guides / Plumbing & Water

Replace RO post-filter

Difficulty: easyTime: 15 minsEst. Cost: $25 - $50

Why it matters

Bacterial regrowth occurs if neglected; compromises final water quality.

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How to do it

  • 1

    Turn off the RO system at main valve.

  • 2

    Locate post-filter housing (usually under sink).

  • 3

    Unscrew old cartridge using filter wrench.

  • 4

    Rinse housing with clean water.

  • 5

    Screw in new post-filter cartridge.

  • 6

    Run water 2 minutes to purge air.