ALPINE HARDWARE Replacement Humidifier Valve for Whole House Humidifiers

The 4040 by Alpine Hardware is a replacement humidifier solenoid valve manufactured for most humidifiers. This valve is comparable to part #4040 and fits Aprilaire models 220, 224, 400, 400A, 400M, 440, 500, 500A, 500M, 550, 550A, 558, 560, 560A, 600, 600A, 600M, 700, 700A, 700M, 760, and 768. However, it does not work on models 330, 445, 110, 112, 350, and 360.

The solenoid valve turns water on and off to your humidifier, but it does not regulate the volume, which is done by a different part called an orifice. The valve contains a pre-installed strainer in the inlet side to capture clogging elements in the water, such as dirt and sand. It uses a pre-existing compression fitting on the outlet side.

Electrically operated, the valve uses 24 volts and 2.3 watts. The manufacturer of this valve recommends that any wiring on your humidifier be completed by a professional contractor.

The humidifier valve includes a compression nut, washer, and strainer. The inlet includes the compression fitting and ferrule, while the outlet reuses your existing compression fitting.

This 4040 solenoid valve is from an American-owned company, Alpine Hardware, and is designed for whole-house humidifiers. It operates at 24 volts, 2.3 watts, and 60 Hz.

In summary, the 4040 by Alpine Hardware is a replacement humidifier solenoid valve that is compatible with a wide range of Aprilaire models, excluding a few, and comes with the necessary components for easy installation. It is recommended that any electrical work on your humidifier be done by a professional contractor.

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