4040 Solenoid Valve
List Price: $87.44 Sale Price: $69.95
The 4040 solenoid valve is a 24 volt AC electrically-operated valve that turns the water on and off to your humidifier. Preinstalled inside of the valve is a 4004 strainer screen, which filters the incoming water, catching things like sand and dirt which could otherwise clog the valve. The solenoid valve needs to be replaced roughly every ten years, but if it fails and is stuck open or closed, it should be replaced immediately. This part is manufactured with either a round solenoid coil OR a square solenoid coil depending upon which production line they come off of. Both work for all applications.
Aprilaire 4040 Solenoid Valve Assembly by Steve (buffalo grove IL US)
replacement was perfect. Same as the old. Easy install and came with instructions. shipped fine.