Aprilaire Genuine OEM Scale Control Insert 4640 for Model 500
Item # PCP4640
Availability: In Stock!

This is the u-shaped component which encases the Water Panel. It directs any built-up mineral deposits back into the water panel and it prevents water from leaving the wet-pack section and entering another portion of the humidifier. Fits model 500.

This Product fits the following Models:
Aprilaire: 500.
MPN: 4640

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