Aprilaire 4331 Water Distribution Tray for Aprilaire Humidifiers

This is an Aprilaire 4331 Humidifier Water Distribution Tray replacement for use in conjunction with the Aprilaire Water Panel Evaporator and the Aprilaire Scale Control Insert. The Aprilaire 4331 water tray distributes water evenly to all portions of the Aprilaire 500 water panel evaporator which ensures the efficiency, longevity, and proper functioning of your Aprilaire humidifier. See part number 4792 maintenance kit for the 500 series and 4839 for the 600 series.  Compatible with the following Aprilaire Humidifiers: Model 500 Model 550A Model 550M Model 600 Model 600A Model 600M