OEM 4021 AP-4021 Aprilaire Humidifier Red Water Orifice for Models 112 224 330

OEM 4021 AP-4021 Aprilaire Humidifier Red Water Orifice for Models 112 224 330

• This is a BRAND NEW OEM Aprilaire Humidifier Red Water Orifice.  This simple but critical part regulates the flow of water into the humidifier. Over time it can become clogged with sediments or mineral deposits.  It should be replaced annually for optimum performance.  Be sure to clean or replace your In Line Strainer (Aprilaire part # AP-4004) when you replace the orifice.  

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