Aprilaire 4793 - Maintenance Kit for Humidifier Models 550, 558

The Aprilaire 4793 maintenance kit contains everything you need for your annual maintenance needs.  Completing this maintenance will keep your humidifier running cleanly and efficiently.

The 4793 Maintenance Kit includes:

• Aprilaire Water Panel 10
• Scale Control Insert 4217
• Water Distribution Tray 4218
• Feed Tube and Compression Sleeve 4226
• Orifice 4231
• Drain Spud 4223
• Nozzle 4184
• Inline Strainer 4004
• Owner's Manual