Francis Fuels Ltd

AprilAire #4330 Humidifier Scale Control Insert, Replacement Part

Aprilaire Humidifier Scale Control Insert Replacement Part #4330

This is the u-shaped component that encases the Water Panel Evaporator. 
 
 
Used with water panel number 35 and the water distribution tray number #4331,  sold separately
 
Fits: 
Aprilaire Model   600, 600A and 600M