Aprilaire 4332 Bypass Damper Assembly
The Aprilaire 4332 Humidifier Damper Assembly is a damper assembly kit that includes a damper blade, spring, and knob. This Aprilaire humidifier kit is designed for Aprilaire humidifier models 400, 500, 550, and 600. This is a genuine Aprilaire part that will have your humidifier running at its factory operational setting resulting in cleaner indoor air.