Aprilaire suggests changing the in-line strainer and the orifice when the pad is changed to prevent problems. This plastic orifice regulates the amount of water the humidifier uses.
Replaces Part: 4231
Fits Models: 400, 550, 550A, 600
Aprilaire suggests changing the in-line strainer and the orifice when the pad is changed to prevent problems. This plastic orifice regulates the amount of water the humidifier uses.
Replaces Part: 4231
Fits Models: 400, 550, 550A, 600