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Aprilaire 550 Humidifier Parts

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    Select a diagram to view its parts

    Parts

    Diagram

    Parts
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15A
    15B
    16
    17
    18

    Parts

    1. 1
      Water Panel Humidifier Pad
      $10.50
    2. 1
      Maintenance Kit Model 550/558
      $76.55
    3. 2
      Scale Control Insert
      $24.95
    4. 2
      Maintenance Kit Model 550/558
      $76.55
    5. 3
      Water Distribution Tray
      $24.95
    6. 3
      Maintenance Kit Model 550/558
      $76.55
    7. 4
      Base
      Base
      SKU: 4219
      $59.95
    8. 5
      End Panel
      End Panel
      SKU: 4220
    9. 6
      Duct Panel
      Duct Panel
      SKU: 4526
    10. 7
      Cover With Latch
    11. 8
      Drain Spud Kit
      $4.45
    12. 9
      Solenoid Valve
      Solenoid Valve
      SKU: 4040
      $80.25
    13. 10
      Strainer Screen
      $6.25
    14. 11
      Saddle Valve
      Saddle Valve
      SKU: 4001
      $9.80
    15. 12
      Yellow Orifice
      $3.15
    16. 13
      Feed Tube
      Feed Tube
      SKU: 4226
      $29.95
    17. 14
      Transformer
      Transformer
      SKU: 4010
      $10.50
    18. 15A
      AutoTrac Humidistat Controller
      $111.00
    19. 15B
      Analog Humidistat
      Analog Humidistat
      SKU: 4655
      $46.30
    20. 16
      Nozzle
      Nozzle
      SKU: 4184
      $2.45
    21. 17
      Cover Latch Spring
    22. 18
      Gasket
      Gasket
      SKU: 4305
      $4.45

    Parts Not In Diagram

    1. Not Shown
      Sensor
      Sensor
      SKU: 8052
      $10.35
    2. Not Shown
      Damper
      Damper
      SKU: 4332
      $29.20
    3. Not Shown
      Blower Activation Relay
      $39.05
    4. Not Shown
      Duct Panel
      Duct Panel
      SKU: 4221
    5. Not Shown
      Analog Humidistat
      Analog Humidistat
      SKU: 4655
      (Substitute part number)
      $46.30
    6. Not Shown
      Sensor
      Sensor
      SKU: 8052
      (Substitute part number)
      $10.35
    7. Not Shown
      Duct Mount Adaptor Plate
    8. Not Shown
      Current Sensing Relay 24V
      $46.80
    9. Not Shown
      Saddle Valve Adaptor
      $55.25
    10. Not Shown
      Shock Arrestor
      $124.25
    Installation Accessories
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