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4021 has been discontinued
Discontinued September 26, 2023
This product was discontinued by the manufacturer.
Product Highlights
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Red
Description
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Aprilaire 4021 Red Orifice is 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 the Models 112, 224 and 330.
Specs
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| Product Type: | Orifice |
|---|---|
| Color: | Red |
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