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Aprilaire 4040
Aprilaire Humidifier Solenoid Valve 24v used in 400 500 600 700 Series
Price:$49.00
Free 1st Class Mail
Aprilaire model 4040 replacement solenoid. Genuine Aprilaire solenoid for model 220, 224, 440, 550, 558, 560, 568, 600, 700, 760, 768. Includes the strainerĀ 4004, installed in valve body.
Specifications printed on solenoid body: 24 volts, 60 Hz, Orifice (3/32 - 3/64).
Both the inlet and outlet are threaded 7/16"-24 UNS for accepting a compression fitting for ¼" tubing. The inlet includes the compression fitting & ferrule. For the outlet, your existing compression fitting is reused.
Aprilaire In-Line Strainer & Orifice
Aprilaire Flow-Thru humidifiers have a solenoid with a small strainer filter in the body. These strainers should be inspected and cleaned when replacing the water panel. If the strainer becomes clogged the water pressure will tear it and pieces will jam the solenoid or loose pieces will block the orifice.
Aprilaire 4040 & Generic 4040 Comparison
Shown below is the Covna brand 4040 versus the Aprilaire 4040. They are manufactured the same wth similar quality standards.

Professional Quality
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Purification &Treatment |
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4040
Humidifier Solenoid 24v with Strainer for Aprilaire
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4004
Aprilaire In-Line Strainer Water Filter
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32005939-001
20 ft Tubing for Humidifiers or Ice Makers, 1/4" OD
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4010
Aprilaire Humidifier Transformer for 120v to 24v
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