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Aprilaire - Yellow Orifice

Item: AA-4231
MFR: 4231


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About This Product

Product Info


Aprilaire - 4231 yellow orifices are the tiny nylon components which accurately meter the flow of water into your humidifier. They allow a specific amount of water to go into the humidifier, unique to your model humidifier. Used in models 400, 400A, 400M, 500, 500A, 500M, 550, 550A, 558, 560, 560A, 568, 600, 600A, and 600M.


Weight0.01 Pounds (lbs)
Length0.375 Inches (In)
Width0.125 Inches (In)
Height0.375 Inches (In)
Country of OriginUSA
ApplicationWater reducing orfice for Humidifiers
Capacity3 Gallons Per Hour
Prop 65No

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