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Aprilaire 4004 Strainer Screen

Compatible with the following Aprilaire Humidifiers:
110, 112, 220, 224, 330, 350, 360, 400/400A/400M, 440, 500/500A/500M, 550/550A, 558, 560/560A, 568, 600/600A/600M, 700/700A/700M, 760/760A, 768, 800, 865, 866

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Part # 4004

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The Aprilaire 4004 strainer screen is installed on the inlet side of the solenoid valve. The purpose of the strainer screen is to filter out sand and other particulate matter which might get into the solenoid valve and clog it. The screen should be replaced every two to three years.

Previous version of this item was black. Current version is red.

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