Aprilaire 400A Humidifier Parts

26 Humidifier Parts Available For This Model

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

Part Categories for APRILAIRE 400A:

Complete Units | Filters | Frames | Hoses, Valves, and Regulators | Other Parts | Tubing

Accessories for all Humidifiers:

Accessories | Chemicals | Tubing

Model Description

Complete humidifier,400a automatic bypass humidifier, 4000 sq ft

Owner's Manuals for APRILAIRE 400A:


      It was very easy to place the order online and was delivered in 2 days. Happy to support a local business!

May 30, 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

Filters

Ref.ImagePart No & DescriptionPrice
7apr45 partapr45 - Wick/filter For Aprilaire Aftermarket
Quantity: 2
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$26.32

In stock

Frames

Ref.ImagePart No & DescriptionPrice
6apr4407 partapr4407 - Water Distribution Tray
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$35.76

In stock

Hoses, Valves, and Regulators

Ref.ImagePart No & DescriptionPrice
apr4004 partapr4004 - In Line Strainer
Quantity: 1
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$3.99

In stock

APR4231 partAPR4231 - Orifice Yellow
Quantity: 1
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$32.31

In stock

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

In stock

8apr4403 partapr4403 - Scale Control Insert/float Chamber
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$19.99

In stock

10apr4405 - Float Cover
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$15.12

Special order

11APR4406 partAPR4406 - Float Assembly Model 400
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$28.98

In stock

Other Parts

Ref.ImagePart No & DescriptionPrice
APR4040OEM partAPR4040OEM - Water Solenoid Vavle ( Oem )
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$153.54

In stock

1APR4728 partAPR4728 - Cover For Aprilaire
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$175.90

In stock

3APR4332 partAPR4332 - Damper Assembly
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$52.12

In stock

12APR4410 partAPR4410 - Water Level Sensor
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$63.92

In stock

Tubing

Ref.ImagePart No & DescriptionPrice
2apr4335 partapr4335 - Feed Tube With Compression Sleeve
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$22.02

In stock

9DRAINTUBE - 1/2\ I.d. Drain Tubing. ."
Quantity: 1
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$0.00 More Info

Special order

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
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$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