Aprilaire 400 Humidifier Parts

37 Humidifier Parts Available For This Model

Looking for genuine replacement parts for your Aprilaire 400? Whether you need Tubing, Filters, or Temperature Gauges, it’s easy to get your humidifier back in shape.

Part Categories for APRILAIRE 400:

Complete Units | Controls | Filters | Frames | Hoses, Valves, and Regulators | Other Parts | Temperature Gauges | Transformers | Tubing

Accessories for all Humidifiers:

Accessories | Chemicals | Tubing

Model Description

Eliminates standing water, making it the perfect choice for homes with sept...

Additional Model Information:

Remote sensing bulb

Owner's Manuals for APRILAIRE 400:


      Got the exact new part, that I needed for my 12 years old Masterbuilt smoker. Less than a week shipping. ??

April 10, 2024 Customer Reviews

Complete Units

Ref.ImagePart No & DescriptionPrice
apr400A partapr400A - Aprilaire Humidifier Unit Auto
Quantity: 1
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$459.19

Special order

Controls

Ref.ImagePart No & DescriptionPrice
13APR56 partAPR56 - Humidistat For Autotrac Has Outdoor Temp
Quantity: 1
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$183.62

In stock

14apr4305 partapr4305 - Gasket Automatic Humidifier Control
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$8.88

In stock

Filters

Ref.ImagePart No & DescriptionPrice
1apr45 partapr45 - Wick/filter For Aprilaire Aftermarket
Quantity: 2
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$26.32

In stock

Frames

Ref.ImagePart No & DescriptionPrice
3apr4407 partapr4407 - Water Distribution Tray
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$35.76

In stock

Hoses, Valves, and Regulators

Ref.ImagePart No & DescriptionPrice
28115205 part28115205 - Flexible Bypass Hose 36 Inch
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$9.99

In stock

2apr4403 partapr4403 - Scale Control Insert/float Chamber
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$19.99

In stock

7apr4040 partapr4040 - Water Valve. ** Read External Info**
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$94.55

In stock

8apr4004 partapr4004 - In Line Strainer
Quantity: 1
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$3.99

In stock

9APR4001 partAPR4001 - Saddle Valve For Aprilaire
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$27.68

In stock

10APR4231 partAPR4231 - Orifice Yellow
Quantity: 1
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$32.31

In stock

19APR4406 partAPR4406 - Float Assembly Model 400
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$28.98

In stock

20apr4405 - Float Cover
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$15.12

Special order

Other Parts

Ref.ImagePart No & DescriptionPrice
GA50 partGA50 - Relay Current Sensing
Quantity: 1
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$47.27

In stock

apr4280 partapr4280 - Shock Arrestor
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$221.74

In stock

APR4040OEM partAPR4040OEM - Water Solenoid Vavle ( Oem )
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$153.54

In stock

4APR4404 - Base Model 400
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$87.96

Special order

5APR4728 partAPR4728 - Cover For Aprilaire
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$175.90

In stock

6APR4410 partAPR4410 - Water Level Sensor
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$63.92

In stock

15APR4332 partAPR4332 - Damper Assembly
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$52.12

In stock

16APR4409 - Name Plate Model 400
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$13.57

Special order

17APR4408 - Hole Plug Model 400
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$7.75

Special order

18apr4336 partapr4336 - Resistor Case And Manual
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$72.00

Out of Stock

Temperature Gauges

Ref.ImagePart No & DescriptionPrice
apr8052 partapr8052 - Outdoor Temperature Sensor
View Part Info
$19.08

In stock

Transformers

Ref.ImagePart No & DescriptionPrice
12apr4010 partapr4010 - Transformer For Aprilaire
Quantity: 1
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$42.54

In stock

Tubing

Ref.ImagePart No & DescriptionPrice
11apr4335 partapr4335 - Feed Tube With Compression Sleeve
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$22.02

In stock

Accessories for all Humidifiers:

Accessories

Ref.ImagePart No & DescriptionPrice
AC-912 partAC-912 - Pan Tabets ( 6 Pack)
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$13.65

In stock

246 part246 - Humidifier Treatment
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$15.65

In stock

Chemicals

Ref.ImagePart No & DescriptionPrice
FSRM6 partFSRM6 - Humidafresh Rainforest Mist Water Treatm
Quantity: 1
View Part Info
$11.03

In stock

FSCA6 partFSCA6 - Humidafresh Cinnamon Apple Water Treatme
Quantity: 1
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$11.15

In stock

FSFV6 partFSFV6 - Humidafresh Vanilla Water Treatment
Quantity: 1
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$11.03

In stock

AC802 partAC802 - Humidifier Bacteriostatic Water Treatmen
Quantity: 1
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$11.28

In stock

1T-6 part1T-6 - Humdf Water Treatment32 Oz
Quantity: 1
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$11.80

In stock

AC816 partAC816 - Extra Strength Humidifier Cleaner
Quantity: 1
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$11.22

In stock

FSOB6 partFSOB6 - Humidafresh Ocean Breeze
Quantity: 1
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$11.53

In stock

3US-6 part3US-6 - Water Treatment Cleaner
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$11.22

In stock

Tubing

Ref.ImagePart No & DescriptionPrice
21581001 part21581001 - Worm Gear Clamp, 5 5/8 - 6 1/2
Quantity: 1
View Part Info
$1.99

In stock