AprilAire 4750 Humidifier Maintenance Kit with Model 35 Water Panel

AprilAire 4750 is a whole-house humidifier maintenance kit with a Model 35 water panel and replacement components for specified AprilAire humidifiers. It is suited to owners maintaining models 700, 700A, 700M, 760, 760A or 768, rather than buyers seeking only a replacement panel.

At a glance

Includes the Model 35 water panel plus other listed maintenance components and an owner's manual.
Listing identifies compatibility with six AprilAire humidifier models: 700, 700A, 700M, 760, 760A and 768.
The stated annual replacement guidance applies to the water panel.

Price

$71.99Save 15%

Reference price: ~~$84.99~~

Price checked: Nov 12, 2026

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Often bought together

AprilAire 35 Water Panel Humidifier Filter Replacement for AprilAire Whole-House Humidifier Models 300, 350, 360, 560, 560A, 568, 600, 600A, 600M, 700, 700A, 700M, 760, 760A, 768 (Pack of 2)

$30.19

AprilAire 4040 Solenoid Valve, 24 Volt for AprilAire Whole House Humidifier Models 400, 400M, 500, 500M, 600, 600M, 558, 550A, 550, 568, 560A, 560, 700, 700M, 768, 760A, 760, 0.5 ounces

$71.44

Pros and cons

Pros

A parts kit rather than a panel-only purchase, which may suit scheduled maintenance when the listed components are needed.
The stated compatibility list helps identify whether the kit matches a specific AprilAire humidifier model.

Technical specifications

9 specifications

Identity
Brand	Research Products Corporation
Kit model	4750
Water panel model	35
Compatible humidifier models	700, 700A, 700M, 760, 760A, 768

Dimensions and installation
Dimensions listed	1.75 x 10 x 13 inches
Weight listed	2 pounds
Water panel dimensions	13" H x 10" W x 1.75" W

Maintenance components
Listed kit contents	Water Panel (35), Scale Control Insert (4236), Water Distribution Tray (4246), Feed Tube with Nozzle, Compression Sleeve, and Nut (4235), Yellow Orifice (4231), In-line Strainer (4004), Owner's Manual
Suggested replacement interval	annually

What to know before buying

Listing details to confirm

The listing describes this as a complete kit for the named models. Confirm your humidifier's exact model before ordering, since compatibility is specified only for 700, 700A, 700M, 760, 760A and 768. The water panel measurement is written as 13" H x 10" W x 1.75" W, while product dimensions are listed as 1.75 x 10 x 13 inches, so the panel's last dimension label is inconsistent.

Who is it for?

A good fit for

Owners of AprilAire 700, 700A, 700M, 760, 760A or 768 humidifiers seeking a maintenance kit with a replacement water panel.
Buyers who need several listed service components and an owner's manual in addition to the panel.

Less suited to

Owners of humidifier models not named as compatible in the listing.
Shoppers who need only a water panel and do not need the other kit components.

AprilAire 4750 Humidifier Maintenance Kit with Model 35 Water Panel · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 480 ratings

5 stars81%81%
4 stars13%13%
3 stars4%4%
2 stars1%1%
1 star1%1%

Customer feedback reports good fit, straightforward installation and replacement components that customers describe as matching the original parts. Some also frame the kit as a way to restore a humidifier rather than replace it. Those points are relevant for owners of the listed compatible models, though fit still depends on matching the exact model. Overall ratings skew strongly toward five-star responses, but ratings alone do not establish why customers gave them.

Positive themes

Customers report that the filter fits well and is easy to install.
Feedback describes the replacement parts as matching the old components.

Frequently asked questions

Which humidifiers does the AprilAire 4750 kit fit?

The listing names AprilAire models 700, 700A, 700M, 760, 760A and 768. Check the model number on your humidifier against that list.

What comes in the kit?

The listing names a Model 35 water panel, scale control insert, water distribution tray, feed tube with nozzle, compression sleeve and nut, yellow orifice, in-line strainer and owner's manual.

How often does the listing recommend replacing the water panel?

It recommends replacing the water panel annually. This guidance is for the panel, not necessarily every component in the kit.