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Aprilaire 400 Humidifier Parts

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    Select a diagram to view its parts

    Parts

    Diagram

    Parts
    1
    2
    3
    4A
    4B
    5A
    5B
    6
    7
    8
    9
    10
    11
    12
    13A
    13B
    13C
    15
    16
    17A
    17B
    18A
    18B
    19
    20
    24

    Parts

    1. 1
      Water Panel Humidifier Pad
      $34.95
    2. 1
      Maintenance Kit Model 400
      $125.75
    3. 2
      Scale Control Insert
      $15.40
    4. 2
      Maintenance Kit Model 400
      $125.75
    5. 3
      Water Distribution Tray
      $19.95
    6. 3
      Maintenance Kit Model 400
      $125.75
    7. 4A
      Base
      Base
      SKU: 4404
      $99.70
    8. 4B
      Base
      Base
      SKU: 4734
      $90.65
    9. 5A
      Cover
      Cover
      SKU: 4329
    10. 5B
      Cover
      Cover
      SKU: 4728
      $89.00
    11. 6
      Water Level Sensor
      $30.75
    12. 7
      Solenoid Valve
      Solenoid Valve
      SKU: 4040
      $80.25
    13. 8
      Strainer Screen
      $6.25
    14. 9
      Saddle Valve
      Saddle Valve
      SKU: 4001
      $9.80
    15. 10
      Yellow Orifice
      $3.15
    16. 11
      Feed Tube
      Feed Tube
      SKU: 4335
      $9.25
    17. 12
      Transformer
      Transformer
      SKU: 4010
      $10.50
    18. 13A
      AutoTrac Humidistat Controller
      $111.00
    19. 13B
      Automatic Humidistat Controller
      $145.35
    20. 13C
      Analog Humidistat
      Analog Humidistat
      SKU: 4655
      $46.30
    21. 15
      Damper
      Damper
      SKU: 4332
      $29.20
    22. 16
      Name Plate
      Name Plate
      SKU: 4409
      $13.80
    23. 16
      Name Plate For Model 400
      Name Plate For Model 400
      SKU: 4880
      $13.75
    24. 17A
      Hole Plug
      Hole Plug
      SKU: 4408
      $7.75
    25. 17B
      Hole Plug
      Hole Plug
      SKU: 4741
      $7.75
    26. 18A
      Resistor Case Manual Label
      $10.80
    27. 18B
      Resistor
      Resistor
      SKU: 4737
      $16.95
    28. 19
      Float
      Float
      SKU: 4406
      $13.90
    29. 20
      Float Cover
      Float Cover
      SKU: 4405
      $26.35
    30. 24
      Gasket
      Gasket
      SKU: 4305
      $4.45

    Parts Not In Diagram

    1. Not Shown
      Sensor
      Sensor
      SKU: 8052
      $10.35
    2. Not Shown
      Blower Activation Relay
      $39.05
    3. Not Shown
      Sensor
      Sensor
      SKU: 8052
      (Substitute part number)
      $10.35
    4. Not Shown
      Current Sensing Relay 24V
      $46.80
    5. Not Shown
      Saddle Valve Adaptor
      $55.25
    6. Not Shown
      Shock Arrestor
      $124.25
    Installation Accessories
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