Pressure Regulation: Maintains the necessary internal pressure differentials for consistent burner performance and ignition reliability

The factory setting is 0

Does the VAL9074 include the solenoid coil

ensuring consistent wall thickness and performance under pressure

Aprilaire 4331 Water Distribution Tray 321894-708 Pressure Regulation: Maintains the necessaryThe Aprilaire 4331 Water Distribution Tray is a critical component engineered to maintain the peak efficiency of your whole house humidifier. Designed specifically for the Aprilaire Model 400, Aprilaire 400A, and Aprilaire 400M series, this genuine OEM part ensures that water is evenly dispersed across the water panel. By utilizing a precision engineered humidifier scale control insert interface, the Aprilaire 4331 prevents uneven saturation and