Lennox Humidifier Models WB2-12, WB2-17 and WP2-18 Solenoid Valve - Part 4040.
Factory replacement water solenoid valve assembly for Aprilaire whole house humidifier includes inlet and outlet fittings.
Water flows to this valve through a 1/4 inch copper tube. This valve electrically opens and closes to control the supply of water to the humidifier. The operation of the solenoid valve is controlled by the humidistat.
The Aprilaire solenoid valve comes equipped with an In Line Strainer already built into it.
Installation should take about one hour.
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