AprilAire 4040 Solenoid Valve (24 Volt)
AprilAire 4040 Solenoid Valve (24 Volt)
For 400, 500, 600, and 700 Whole-House Humidifiers








- 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 AprilAire humidifiers models 400, 500, 600 and 700.
- Compatible Models: 220, 224, 225, 400, 400A, 400K, 400M, 400MK, 400MZ, 400Z, 400KZ, 400MKZ, 440, 500, 500A, 500K, 500M, 500MK, 500MZ, 500Z, 500KZ, 500MKZ, 550, 550A, 558, 560, 560A, 568, 600, 600A, 600K, 600M, 600MK, 600MZ, 600Z, 600KZ, 600MKZ, 700, 700A, 700M, 700MZ, 700Z, 700KZ, 700MKZ, 760, 760A, 768
- Materials: Metal, Wire - Insulated Copper
- Actual Measurements: 1.95H x 2.75W x 1.8D (inches)
INCLUDED IN THE BOX:
- 4040 Solenoid Valve
- 4004 Inline Strainer
- Compression Sleeve
- Compression Nut
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.

AprilAire Is Healthy Air
AprilAire is on a mission to make homes healthy. We believe everyone deserves Healthy Air and envision a future with Healthy Air in every home.
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By The Numbers
70 years of filling homes with Healthy Air! Our mission has always been to make homes healthy, creating whole-house solutions inspired by the needs of our customers.
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Invisible Pollutants
Just because you can’t see airborne allergens, doesn’t mean they’re imaginary. Put your health and home first with AprilAire whole-house solutions.
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Healthy Homes
70 years of filling homes with Healthy Air! Our mission has always been to make homes healthy, creating whole-house solutions inspired by the needs of our customers.
