Aprilaire Humidifier Maintenance Kit for 600 series

AprilAire 4839 Humidifier Maintenance Kit with Water Panel Model No. 35 Humidifier Replacement Filter for AprilAire Whole-House Humidifier Models: 600, 600A, 600M

AprilAire H635EZ1A Humidifier Filter/Water Panel Assembly Replacement Kit for AprilAire Whole-House Humidifier Models: 600, 600A, and 600M

AprilAire 4040 Solenoid Valve, 24 Volt for AprilAire Whole House Humidifier Models 400, 400M, 500, 500M, 600, 600M, 558, 550A, 550, 568, 560A, 560, 700, 700M, 768, 760A, 760, 0.5 ounces