ESP Universal Humidifier Solenoid 24 V 1/4 x 1/4

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This is the #1 humidifier solenoid replacement on the market. Directly replaces the Aprilaire 4040, and 100's of other units with a fitting changeout. This universal humidifier solenoid replaces 99% of all humidifier solenoids out in the field including: Aprilaire #4040 General #990-53 Honeywell #32001639-002 Skuttle #A01-0814-148 Carrier #4357