- Make sure this fits by entering your model number.
- Genuine Aprilaire humidifier replacement part
- Ensures that the right amount of humidity is delivered into your home
- Controls how much moisture enters your humidifier, making it possible to maintain proper humidity levels throughout your home
- Compatible with all Aprilaire humidifiers except for commercial units and residential models 800, 330, 445, 110, 112, 350 and 360
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Proper humidification of your home is important for protecting your family’s health and the beauty of your home. The 4040 24 Volt Solenoid Valve controls the amount of water that enters your humidifier, ensuring that the right amount of humidity is delivered into the air every time it turns on. Usually installed by your contractor, the solenoid valve is part of the core of your humidifier, making it possible for you to adjust moisture levels with precision and accuracy.