Aprilaire Model 440 Parts

Aprilaire has discontinued many parts for the model 440. We have several in stock and update the website several times per day for accuracy.

Aprilaire Humidifier Model 440 Parts List
Diagram #	Name	Part #	Price
1	Saddle Valve	4001	$13.25
2	Screw and Clip Set - Discontinued	4086	Discontinued
3	Orifice (Blue)	4232	$3.00
4	Water Solenoid Valve (24v)	4040	$75.46
5	In-Line Strainer	4004	$5.78
6	Knob (for Top Cover)	4166	8.98
7	Feed Tube and Nozzle	4079	$12.96
8	Water Distribution Tray	4081	$21.14
9	Water Panel Evaporator	12	$12.25 or 3/$32.85
10	Scale Control Insert	4080	$23.10
11	Transformer	4010	$22.66
12	Manual Humidistat	4016	Discontinued
13	Metal Frame	4171	$79.74
14	Top Cover (Knobs are separate)	4162	$92.64
15	Lower Housing - Discontinued	4163	Discontinued
16	Solenoid Cover - Discontinued	4167	Discontinued
	Auto-Trac Control System	56	$95.60
	Auto-Trac Sensor and Shield	4278	$15.00
	"O" Ring for Bullet Shaped Solenoid Valve	4006	Discontinued
	Strainer for Bullet Shaped Solenoid Valve	4103	$10.25
	Drain Spud Replacement Kit - Discontinued	4038	$6.46
	Humidistat Adapter Plate	4039	$6.23
	Shock Arrestor	4280	$101.86