ESP Universal Humidifier Solenoid 24 V 1/4 x 1/4 UHS99

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