| Genuine Aprilaire 4403 Scale Central Insert / Float Chamber For Model 400 |
 The Aprilaire Scale Control Insert 4403 is the U-shaped component which encases the Water Panel. It directs any built-up mineral deposits back into the water panel, and it prevents water from leaving the wet-pack section and entering another portion of the humidifier. Used with the water panel number 45, and the distribution tray number 4407. Also see the maintenance kit part number 4788 . Related Products: Aprilaire 400A Humidifier Aprilaire 400M Humidifier Aprilaire 45 Water Panel (Pack of 2) Price: 16.99 |