The Aprilaire Humidifier Solenoid Valve is also known as Aprilaire 4191. This humidifier selenoid replacement valve fits the Aprilaire 120V Hang-Mount Whole-House Humidifier and the Aprilaire 120V Through-The-Wall Whole-House Humidifier.
A 1/4" copper tube allows water to flow through this Aprilaire Selenoid Valve. The water supply to the humidifier is electrically controlled and a humidistat controls the operation of this Aprilaire 4191 valve.
Aprilaire 350/360 Series Humidifier Solenoid Valve specifications:
On the inlet side of the Aprilaire 4191 Replacement Valve is a pre-installed inline strainer. The factory replacement assembly of the 4191 Selenoid valve includes inlet and outlet fittings. A ferrule and compression nut is included on the inlet side only. This replacement valve is easy to install and comes with a 1 year limited warranty through the manufacturer.
It is recommended that you check to see what your electrical junction box is made of first, depending on the age of your humidifier. Aprilaire 4191 Selenoid Valve fits units with plastic junction boxes. For humidifiers with a metal junction box, Aprilaire 4255 Selenoid Valve will fit these units.