Aprilaire Maintenance Kit for 400 & 400A

Aprilaire Humidifier Maintenance Kit 4788 helps ensure your Aprilaire Humidifier 400, 400A and 400M continues to perform at peak efficiency. Includes: #45 - Humidifier Water Panel Evaporators (2 Pack) #4004 - Humidifier Inline Strainer #4231 - Yellow Orifice #4403 - Scale Control Insert #4406 - Humidifier Float Assembly #4407 - Humidifier Water Distribution Tray #4335 - Feed Tube Printed Manual