Aprilaire Humidifier Maintenance Kit 4793 includes everything required for your Aprilaire Humidifier 550, 550A and 558 to continue operating at its peak efficiency.
What's Included
10 - Water Panel
4004 - Inline Strainer
4231 - Yellow Orifice
4223 - Drain Spud
4226 - Water Feed Tube
4217 - Scale Control Insert
4218 - Distribution Tray
User Manual
