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Description
4040 Humidifier Solenoid Valve 24V Water Valve4040 Humidifier Solenoid Valve 24V Water Valve Key Features Controls water flow for whole house humidifiers Operating Voltage: 24V AC Includes in line strainer, compression sleeve, and nut Replaces Cross Reference Part Numbers AprilAire: 4040 Ranco: 4040 001 Compatibility & Fitment Designed for AprilAire Whole House Humidifiers. Compatible Models: 220, 224, 400, 400M, 440, 448, 500, 500M, 550, 550A, 558, 560, 600, 600M, 700 When to Replace Humidifier
4040 Humidifier Solenoid Valve 24V Water Valve
Key Features
- Controls water flow for whole-house humidifiers
- Operating Voltage: 24V AC
- Includes in-line strainer, compression sleeve, and nut
Replaces / Cross-Reference Part Numbers
- AprilAire: 4040
- Ranco: 4040-001
Compatibility & Fitment
- Designed for AprilAire Whole-House Humidifiers.
- Compatible Models: 220, 224, 400, 400M, 440, 448, 500, 500M, 550, 550A, 558, 560, 600, 600M, 700
When to Replace
- Humidifier does not receive water when operating.
- Water flow is weak, inconsistent, or stops completely during a cycle.
- Inability to maintain set humidity levels.
- Visible water leaks, drips, or corrosion on the existing valve body.
- Valve makes a buzzing noise but does not open to allow water flow.
Installation Tips
- Before installation, shut off the water supply and disconnect power to the furnace and humidifier.
- Note the water flow direction indicated on the original valve body and install the new valve in the same orientation.
- Use two wrenches during removal and installation to avoid twisting or damaging water lines.
- Ensure the included strainer is correctly seated to prevent debris from clogging the valve.
- After installation, slowly turn the water supply on and check all connections for leaks before restoring power.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
MoreThan Just A Shelf
Color: 1set, Size: 24inch
Absolutely love this Helsin 3-Tier Industrial Pipe Shelf! It completely transformed a blank wall in my home office into a stylish, functional display area that’s equal parts rustic charm and industrial cool. The real wood shelves are thick, sturdy, and beautifully finished with that perfect rustic vibe. Combined with the heavy-duty black metal piping, this unit feels rock solid once mounted. Zero wobble. I was honestly surprised at how simple the installation was. All the parts were included, instructions were clear, and it went up faster than expected. I had it securely mounted to studs in under 10 minutes. This shelf works just as well for books, plants, décor, or collectibles. I’ve got a mix of framed photos, succulents, and vintage finds on mine, and it handles the weight with no issue. It gives vertical storage without eating up floor space, and the combination of rustic wood and industrial pipe makes it a true statement piece. I’ve had multiple compliments already! I could see this shelf fitting perfectly in living rooms, kitchens, offices, or even bathrooms. It’s compact enough for smaller spaces but bold enough to stand out in larger rooms. Highly recommended!
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Reviewed in the United States on August 5, 2025
★★★★★ 5
Great product!
Color: 1set, Size: 24inch, Color: 1set, Size: 24inch
I love this shelf so much I bought it for 2 rooms. Stylish easy to put together and hang on the wall. Shelving is durable metal is strong. Nicely colored wood shelves. Seems to be holding up well in the humidity of the bathroom.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Great shelf
Color: 1set, Size: 32inch, Color: 1set, Size: 32inch
Looked great in home office. Easy to assemble and not too difficult to install. Hardest part was measuring and getting two shelf sets to align properly on the wall but would have been super easy with just one. Will need a drill for the anchors.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Quality
Color: 1set, Size: 24inch
Very easy to assemble and mount very stable and good looking 100% recommend
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Sturdy and great looking
Color: 1set, Size: 24inch
Easy to build, looks good, sturdy. Good quality
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Reviewed in the United States on January 30, 2026