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#4231 Aprilaire Yellow Orifice

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#4231 Aprilaire Yellow Orifice

• For use with Aprilaire models 400, 400A, 400M, 500, 550, 550A, 558, 560, 560A, 568, 600, 600A & 600M.
• These are the tiny nylon components which, accurately meter the flow of water into your humidifier.
• Allows a specific amount of water to go into the humidifier, some of which is evaporated and some which performs the important flushing action.
• Keeps the Water Panel clean and reduces maintenance to a minimal amount.

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