The Aprilaire 4330 Scale Control is used with the number 35 water panel and 4331 water distribution tray

Aprilaire 4330 Scale Control Insert for Humidifier Model 600

Regular price $22.75 Sale

The Aprilaire 4330 Scale Control Insert is the u-shaped component which encases the Water Panel Evaporator. Used with water panel number 35 and the water distribution tray number 4331. Also see the part number 4839 maintenance kit. For Models 600, 600A and 600M.