Features:

• The Aprilaire 4040 solenoid valve is a 24 VAC electrically-operated valve that turns the water on and off to your humidifier
  
• The solenoid valve needs to be replaced roughly every 10 years, but if it fails and is stuck open or closed, it should be replaced immediately
  
• This part is manufactured with either a round solenoid coil or a square solenoid coil depending upon which production line they come off of
  
• Arrow points from inlet to outlet orientation
  
• Cylindrical coil
  
• Includes strainer screen pre-installed, (1) compression nut, (1) compression ferrule, instructions

Specifications:

• Brand/Model Compatibility: 400, 500, 600 and 700 Humidifier Models
  
• Length: 2-1/2 in.
  
• Valve Size: 1/4 in. x 7/16 in.
  
• Volts: 24V
  
• Watts: 2.3 W
  
• Product Type: HVAC/R Solenoid Valves