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Aprilaire Maintenance Kit 4788

Aprilaire Humidifier Maintenance Kit 4788 helps ensure your Aprilaire Humidifier 400, 400A and 400M continues to perform at peak efficiency.

The maintenance kit 4788 contents include:

  • Water Panel 45 (2 pack)

  • Scale Control Insert 4403

  • Water Distribution Tray 4407

  • Float Assembly 4406

  • Feed Tube and Compression Sleeve 4335

  • Orifice 4231

  • Inline Strainer 4004

  • Owner's Manual

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Get it straight from the source!

  • Genuine Aprilaire replacement parts made by Aprilaire in Poynette Wisconsin U.S.A.

  • Made specifically for Aprilaire humidifier for best fit and performance

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