Aprilaire / Generalaire 4040 Humidifier Solenoid Valve
Replacement humidifier solenoid for Aprilaire models 220, 224, 400, 440, 550, 550A, 558, 560, 560A, 568, 600, 760, 760A, 768, and 700. This valve operates on 24V. This is manufactured by Generalaire to fit Aprilaire humidifiers.