Choosing the right water solenoid valve is essential for consistent humidity in homes with Aprilaire and similar whole-house humidifiers. The valves below are designed to regulate water flow to maintain indoor humidity around 35% to 45%, enhancing comfort and reducing respiratory dryness. This guide highlights five highly compatible, durable options from trusted brands, with key features to help you compare fit, longevity, and installation needs.
Summary of Selected Products
| Product | Brand | Key Fit / Models | Voltage / Power | Special Note |
|---|---|---|---|---|
| TOMOON Humidifier Water Solenoid Valve 4040 Yellow | TOMOON | Aprilaire 400, 400M, 500, 560, 768, 760, 700M, etc. | 24V • 2.3W • 60Hz | Includes compression nut and washer |
| PETOX 4040 Humidifier Solenoid Valve 4040 Yellow | PETOX | Aprilaire 400, 400M, 500, 600, 560, 700, 768, 760 | 24V • 2.3W • 60Hz | Premium brass, includes inline strainer |
| AMI PARTS 4040 Replacement Water Valve Blue | AMI PARTS | Aprilaire 400/500/600/700/768/760 series | 24V • 2.3W • 60Hz | Includes compression nut, washer, strainer |
| Aprilaire 4040 Solenoid Valve (Original) | Aprilaire | Full 400/500/600/700/768/760 line | 24V • 2.3W | Genuine replacement part |
| TOMOON 4040 Humidifier Water Solenoid Valve Blue | TOMOON | Aprilaire 220/224/400/400A/400M/440/500/550/558/560/600/700/760/768 | 24V • 2.3W • 60Hz | Blue variant with included hardware |
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TOMOON 4040 Yellow Solenoid Valve for Aprilaire
The TOMOON 4040 Yellow solenoid valve is designed to regulate water flow to Aprilaire humidifiers. It targets an indoor humidity range of 35% to 45%, supporting healthier air and reduced dryness. This valve is rated for 24 volts and 2.3 watts at 60 Hz, and it supports a wide range of Aprilaire models, including 550/560/600/700 series. The package typically includes the valve and essential mounting hardware. This option emphasizes durability and compatibility for common whole-house humidifiers.
PETOX 4040 Humidifier Solenoid Valve Yellow
PETOX’s 4040 replacement valve is built for wide compatibility with Aprilaire models such as 400, 400M, 500, 600, 700, and 768/760 series. It features premium brass construction with a compact design and includes compression nut, washer, and inline strainer for easier installation. The valve maintains optimal humidity by controlling water flow and supports 24V, 2.3W, 60 Hz operation to ensure reliable performance in daily use.
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AMI PARTS 4040 Replacement Water Valve Blue
AMI PARTS offers a 4040 replacement valve in blue, designed to work with Aprilaire humidifiers across multiple models, including 400, 500, 600, 700, and 768/760 series. The valve operates at 24 volts and 2.3 watts, with the additional benefit of a compact, easy-install design. The package typically includes the compression nut, washer, and inline strainer, delivering a ready-to-install solution.
Aprilaire 4040 Solenoid Valve, Genuine Replacement
This is the genuine AprilAire 4040 solenoid valve designed to optimize water delivery to AprilAire whole-house humidifiers. It includes an inline strainer, compression sleeve, and compression nut for installation. The valve controls the amount of water entering the humidifier, ensuring accurate humidity delivery across a broad range of models, including 400, 400M, 500, 600, 700, 768, and 760 series.
TOMOON 4040 Blue Humidifier Valve for Aprilaire
The TOMOON blue variant mirrors the yellow 4040 design with a focus on similar models such as 220, 224, 400, 400A, 400M, 440, 500, 550, 558, 560, 600, 700, 760, and 768. It comes with the necessary compression nut, washer, and inline strainer. Operating at 24V and 2.3W at 60 Hz, this valve is aimed at reliable, steady humidity management in homes using Aprilaire systems.
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Buying Guide: Key Purchase Considerations
- Compatibility: Verify model compatibility with your humidifier’s exact series (e.g., 400, 550, 700, 768). A mismatch can affect humidification performance or require additional adapters.
- Electrical Specifications: Most 4040 valves operate at 24V, 2.3W, 60 Hz. Confirm your control transformer matches these specs to ensure reliable operation.
- Material Quality: Brass bodies and stainless-steel seats offer longevity and corrosion resistance. Premium variants often include inline strainers and compression fittings for a secure installation.
- Installation: Look for valves that include compression nuts, washers, and strainers. Easy-to-install parts reduce time and risk of leaks during setup.
- Humidity Control Precision: The valve should provide stable water flow to maintain 35%–45% indoor humidity. If humidity swings are common, consider a valve with a proven track record for steady performance.
- Brand Reputation: Trusted brands like Aprilaire, TOMOON, PETOX, and AMI PARTS offer more reliable replacements and better compatibility with common home humidifiers.
- Warranty and Support: Check for warranty coverage and available technical support in case of installation questions or part failures.
- Price vs. Longevity: While price is a factor, prioritize durability and compatibility. A slightly higher upfront cost can yield longer service life and fewer replacements.