Maintenance Guides / Plumbing & Water

Replace UV sterilizer lamp

Difficulty: easyTime: 15 minsEst. Cost: $30 - $100

Why it matters

UV bulbs lose germicidal output after ~12 months even while still glowing. Replacement is cheap but water will be unsterilized if skipped.

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How to do it

  • 1

    Turn off the UV sterilizer at the electrical breaker.

  • 2

    Allow the lamp to cool for 5 minutes.

  • 3

    Unscrew or slide out the old UV lamp cartridge.

  • 4

    Install the new lamp, ensuring it seats fully in the fixture.

  • 5

    Turn the UV sterilizer back on.

  • 6

    Write the replacement date on the chamber with a permanent marker.