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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.
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4.8 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Wonderful tips for young adults beginning their journey into adulthood!
Format: Kindle
If only we were all taught these basic skills before we leave home. Unfortunately, that is not always the case. This is where a book like Life Skills comes in as an excellent teacher of learning those necessary skills! Great book, easy to understand, full of great advice.
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Reviewed in the United States on June 6, 2022
★★★★★ 5
Good tips for teens and not so young
Format: Kindle
This booklet is a good read for teens to get the most important facts about how to manage their finances. It offers great tips for everybody, too.
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Reviewed in the United States on June 6, 2023
★★★★★ 3
Too simple
Format: Kindle
Some of the information is inaccurate or out of date such as the food pyramid. Much of should have been learned long before they are ready to leave home. But some of it such as the simple recipes and the cleaning solutions are useful. I wish the author had spent a little time to address teens with disabilities and other special circumstances. All in all a decent book but the author could have done so much more.
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Reviewed in the United States on June 2, 2022
★★★★★ 5
Very Informative About Little Known ,But Important History
Format: Hardcover
My Dad likes the history which he has learned from Jim Clyburn. He learned more details about the Eight.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Clyburn captures the past to warn us about the present and future.
Format: Hardcover
I enjoy this book. The history of white Conservatives first taking the black vote away by domestic terrorism and violence and then changing the rules to make getting the vote back nearly impossible explains the 70 year gap between the first eight and the ninth (Clyburn). He mixes the past record of lying and dirty tricks of Conservatives with current events that attempt to bring about the same result. Thanks for all of your work in bringing this great history. It should admonish all of us to work to make sure we don't fall victim to the lying and dirty tricks of the Conservatives of the present.
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Reviewed in the United States on May 14, 2026