Suitable For Use With:
Model 400, 400A, 400M, 500, 500A, 500M, 550, 550A, 558, 560, 560A, 568, 600, 600A and 600M Humidifier
Aprilaire 4231 yellow orifice is used to accurately meter the flow of water for the Aprilaire Models 400, 400A, 400M, 500, 500A, 500M, 550, 550A, 558, 560, 560A, 568, 600, 600A, and 600M.
Material
Dimensions
Type
Color/Finish
Suitable For Use With
IsInactive
Plastic
11/64 in OD
Humidifier Part
Yellow
Model 400, 400A, 400M, 500, 500A, 500M, 550, 550A, 558, 560, 560A, 568, 600, 600A and 600M Humidifier