| Genuine Aprilaire 4021 Orifice - Red |
 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. Related Products: Aprilaire 400A Humidifier Aprilaire 400M Humidifier Aprilaire 500A Humidifier Aprilaire 500M Humidifier Aprilaire 600A Humidifier Aprilaire 600M Humidifier Aprilaire 800 Steam Humidifier Price: 14.95 |