How to Wire a Spa Ozonator Replacement: Old Red, Blue, Green Wires to New Black and White

Spa Ozonator Replacement Wiring Made Simple

When replacing a spa ozonator, you may find the old unit uses Red, Blue, and Green wires, while the new ozonator has only Black and White. Here’s how to connect them correctly.

Old ozonator wiring

  • Red or Blue: Power (hot and neutral)
  • Green: Ground

New ozonator wiring

  • Black: Hot (line)
  • White: Neutral
  • Some new ozonators do not include a ground wire

How to connect

  • Connect one old Red or Blue wire to Black (hot)
  • Connect the other Red or Blue wire to White (neutral)
  • Keep Green on ground

Before powering up

  • Confirm the ozonator matches your spa voltage (120V or 240V)
  • Check your spa’s wiring diagram for accuracy
  • Use a multimeter if you’re unsure

This wiring guide helps ensure a safe and correct hot tub ozonator replacement.

Aug 28th 2025 SpaStore.com

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