Aprilaire 4040 Humidifier Solenoid Valve
Aprilaire 4040 Humidifier Solenoid Valve is a genuine OEM replacement part for the Aprilaire Humidifier Models: 220, 224, 440, 550, 558, 560, 568, 600, 700, 760, and 768
The Aprilaire 4040 Humidifier Solenoid Valve is the Genuine OEM solenoid replacement for the Aprilaire Humidifier Models: 220, 224, 440, 550, 558, 560, 568, 600, 700, 760, and 768
The 4040 Aprilaire Solenoid Valve is the point of entry for water to enter you humidifier.
This Solenoid Valve comes with an in-line strainer already built into it. The inlet and the outlet threads are measured 7/16" - 24 UNS and can accept a compression fitting for 1/4" tubing. The inlet includes the compression fitting and ferrule needed, the outlet reuses the compression fitting that originally came with your unit.
This solenoid valve is also the same part as the Lennox 52P90 Solenoid Valve and can be used in the following Lennox Humidifier series:
HCWB2-12, 12A, 17, 17A
HCWB3-12, 12A, 17, 17A
WB2-12, 12A, 17, 17A
What does a Solenoid Valve Do?
A solenoid valve controls the water flow to your humidifier, it chooses whether the humidifier has access to water flow or not from your water supply. If
the solenoid valve is closed, it will not allow water to flow to your humidifier. Only when the valve is given 24 Volts will it open and supply water to the humidifier to product humidity. (it is given these volts when the humidifier is turned on by the homeowner or by the humidistat).