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  • No minimums, no surprises — we ship every order for free! We’ll get your filters out the door fast so you can enjoy clean air and water without paying extra.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

    Learn More

  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

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  • Tune Up Kit For Aprilaire Model 550, 550A and 558 Humidifiers

Aprilaire 4793 | Our#: 176864

Tune Up Kit For Aprilaire Model 550, 550A and 558 Humidifiers

Aprilaire 4793 | Our#: 176864

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Tune Up Kit For Aprilaire Model 500, 500A and 500M Humidifiers
Tune Up Kit For Aprilaire Model 550, 550A and 558 Humidifiers
Tune Up Kit For Aprilaire Model 550, 550A and 558 Humidifiers
Tune Up Kit For Aprilaire Model 550, 550A and 558 Humidifiers
Tune Up Kit For Aprilaire Model 550, 550A and 558 Humidifiers
Tune Up Kit For Aprilaire Model 550, 550A and 558 Humidifiers
Tune Up Kit For Aprilaire Model 550, 550A and 558 Humidifiers

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Product Details

Tune Up Kit For Aprilaire Model 550 Series Humidifiers (Part # 4793).  This Tune-Up Kit works for whole house small bypass humidifiers - models 550, 550A and 558.

This kit contains everything you need to maintain your Aprilaire humidifier.  The kit includes:

  • #10 Water Panel (QTY 1)
  • 4226 - Feed Tube Assembly With 4184 Nozzle (nozzle snaps into distribution tray) - 27" Long
  • 4231 - Yellow Orifice (comes nested in feed tube)
  • 4004 - Inline Strainer (included in feed tube envelope)
  • Compression Nut and Ferule (included in feed tube envelope)
  • 4217- Scale Control Insert
  • 4218- Water Distribution Tray
  • 4184 - Nozzle