4223 Drain Spud Replacement for Aprilaire Humidifier Filter 500, 500A, 500M, 600
FIT FOR APRILAIRE APRILAIRE APRILAIRE APRILAIRE & HONEYWELL APRILAIRE & HONEYWELL APRILAIRE. 【VALUE MAINTENANCE KIT】No need to find the parts yourself! FIT MODEL 600, 600A, 600M 400, 400A, 400M, 500, 500A, 500M, 600, 600A 600M 600, 600A, 600M 110, 220, 500, 500A, 500M, 550, 550A, 558 350,560,560A,568,600,600A,600M,700,700A 400, 400A, 400M.