• Replacement solenoid value for Aprilaire Humidifier models 220, 224, 400, 440, 500, 550, 558, 560, 568, 600, 700, 760, 768
• The #4040 soleniod valve includes a new inline strainer

We recommend using Qualified HVAC Contractor to install this part

AS WITH ALL ELECTRICAL PARTS -- THIS PART IS NOT RETURNABLE FOR REFUND