Aprilaire 550A Humidifier Parts

39 Humidifier Parts Available For This Model

Looking for genuine replacement parts for your Aprilaire 550A? Whether you need Tubing, Filters, or Temperature Gauges, it’s easy to get your humidifier back in shape.

Part Categories for APRILAIRE 550A:

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

Accessories for all Humidifiers:

Accessories | Chemicals | Tubing

Model Description

Parts are available, however complete unit is no longer available and is re...

Owner's Manuals for APRILAIRE 550A:


      I am pleasantly surprised that my order was shipped the same day that I placed it. When my package arrived yesterday, the care in packing my items was amazing.

November 9, 2021 Customer Reviews

Complete Units

Ref.ImagePart No & DescriptionPrice
APR550A - Humidifier Complete Unit
Quantity: 1
View Part Info
$152.68

Special order

Controls

Ref.ImagePart No & DescriptionPrice
15AAPR56 partAPR56 - Humidistat For Autotrac Has Outdoor Temp
Quantity: 1
View Part Info
$183.62

In stock

18apr4305 partapr4305 - Gasket Automatic Humidifier Control
View Part Info
$8.88

In stock

Covers

Ref.ImagePart No & DescriptionPrice
7apr4222 partapr4222 - Cover With Latch And Label
View Part Info
Not Available More information
17apr4225 partapr4225 - Cover Latch Spring
View Part Info
$13.98

Out of Stock

Filters

Ref.ImagePart No & DescriptionPrice
a10wr parta10wr - Wicking Style Filter 709, Paper Material
Quantity: 1
View Part Info
$15.40

In stock

1a10 parta10 - Aprilaire #10 Pad Hard Wick
Quantity: 1
View Part Info
$16.43

In stock

Frames

Ref.ImagePart No & DescriptionPrice
APR4598 - Ionizer Frame Assembly
Quantity: 1
View Part Info
$320.06

In stock

Hoses, Valves, and Regulators

Ref.ImagePart No & DescriptionPrice
8apr4223 partapr4223 - Sold Each...drain Spud For Aprilaire
Quantity: 1
View Part Info
$7.32

In stock

9apr4040 partapr4040 - Water Valve. ** Read External Info**
View Part Info
$94.55

In stock

10apr4004 partapr4004 - In Line Strainer
Quantity: 1
View Part Info
$3.99

In stock

11APR4001 partAPR4001 - Saddle Valve For Aprilaire
View Part Info
$27.68

In stock

12APR4231 partAPR4231 - Orifice Yellow
Quantity: 1
View Part Info
$32.31

In stock

16apr4184 partapr4184 - Nozzle For Aprilaire
View Part Info
$13.78

In stock

Other Parts

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

In stock

APR51 partAPR51 - Current Sensing Relay
Quantity: 1
View Part Info
$68.54

In stock

apr4280 partapr4280 - Shock Arrestor
View Part Info
$221.74

In stock

apr4039 partapr4039 - Plate Humidstat
View Part Info
$13.50

In stock

APR4040OEM partAPR4040OEM - Water Solenoid Vavle ( Oem )
View Part Info
$153.54

In stock

SUHS24 partSUHS24 - Solenoid
View Part Info
$33.00

In stock

3APR4793 partAPR4793 - Maintance Kit-see Desc For What Is Incl
View Part Info
$104.99

In stock

4APR4219 - Base 550
View Part Info
$75.21

Special order

15BAPR4655 partAPR4655 - Manual Humidistat
View Part Info
$91.86

In stock

Panels

Ref.ImagePart No & DescriptionPrice
5APR4220 - End Panel Model 550
View Part Info
$57.12

Special order

6APR4221 - Duct Panel
View Part Info
$70.76

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
14apr4010 partapr4010 - Transformer For Aprilaire
Quantity: 1
View Part Info
$42.54

In stock

Tubing

Ref.ImagePart No & DescriptionPrice
13apr4226 partapr4226 - Feed Tube With Compression
View Part Info
$14.68

In stock

Accessories for all Humidifiers:

Accessories

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

In stock

246 part246 - Humidifier Treatment
View Part Info
$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
View Part Info
$11.15

In stock

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

In stock

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

In stock

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

In stock

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

In stock

FSOB6 partFSOB6 - Humidafresh Ocean Breeze
Quantity: 1
View Part Info
$11.53

In stock

3US-6 part3US-6 - Water Treatment Cleaner
View Part Info
$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