Model 500 Series Parts
Replaceable components for Aprilaire Model 500 humidifiers. Distribution trays, scale control insert more. All parts are shipped in "single" carton quantities.
4004 In Line Strainer
The In-Line Strainer is a tiny strainer that fits in the inlet fitting of the water solenoid valve which allows water to enter your humidifier....
9960 Weather Station
Digital Weather Station. Operates on one AAA battery. Displays current temperature and relative humidity. Displays in Celsius or Fah...
4223 Drain Spud - For Models All 500 & 600 Series
This is the plastic fitting which attaches to the base of the housing of your humidifier. It is designed to allow for the connection of the 1/2" d...
4792 Maintenance Kit for Aprilaire Model 500
This kit includes everything you need to make your Aprilaire Model 500 like new: #10 water panel, #4640 Scale Control Insert (black plastic frame), #4...
FREE Shipping on Maintenance Kit
4040 24 Volt Solenoid Valve
The solenoid valve allows water to come into your humidifier. This valve can be used on all Aprilaire humidifiers ...
4231 Yellow Orifice
These are the tiny nylon components which, accurately meter the flow of water into your humidifier. They allow a specific amount of water to go into t...
4640 Scale Control Insert - For Model 500
This is the u-shaped component which encases the Water Panel Evaporator. Used with water panel number 10 and water distribution tray part numb...
4331 Water Distribution Tray - For Model 500 & 600
This is the water distribution tray which distributes water evenly to all portions of the water panel. They attach to the u-shaped scale control i...
4335 Feed Tube W/Sleeve - For Model 400, 500 & 600
This is the water feed tube inside the humidifier, which connects the solenoid valve and then to the water distribution tray at the top of the uni...
4001 Saddle Valve
This is the self-tapping water valve that attaches to the water line in your home and supplies water to the Aprilaire Humidifier via copper tubing...
Part # 10 Water Panel Evaporator
Fits Models 550, 550A, 500, 110 and 220. Water Panel Evaporators are the heart of your humidifier and the component which generates the important hum...
Buy any 2 of the same water panel and receive free shipping. (Shipping to U.S. only)