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The Aprilaire 4403 is a compatible part for the following humidifier models:
The Aprilaire 4403 Humidifier Float Chamber is a float chamber for Aprilaire 400 model humidifiers. This float chamber is a U-shaped component that encases the water panel of the humidifier and directs any built-up mineral deposits back into the water panel. The Aprilaire humidifier panel prevents water from leaving the evaporative section and entering another portion of the humidifier.
This is a genuine Aprilaire part, also known by part number 4403, and is guaranteed to match with your Aprilaire 400 model humidifier. Aprilaire parts are made with high quality material in order to provide customers with higher indoor air quality and comfort. Be sure to replace this humidifier float chamber as needed.
Aprilaire 4403 Humidifier Float Chamber specifications: