Aprilaire 600 Humidifier Repair Parts and Supplies
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For best performance Humidifier Water Panels should be replaced annually.
Aprilaire Humidifiers have very few problems. Many problems occur through neglect to do proper maintenance. If you ever need any parts for your humidifier we have them or can get them. All parts listed on this page are in stock.
Below we have many of the parts and supplies that you need to keep your Aprilaire 600 Humidifier in top working condition!


Two-Pack Special Price Section:
We have a two-pack special price for Aprilaire Stock
#35.
We have individual water panel prices and case price
section below this.

Two Aprilaire Stock #35 Water Panels Only $20. That is only
$10.00 Each.
Individual One Water Panel at a time Section:
The Aprilaire Stock #35 Evaporative Media Water Panel below fits Aprilaire models: 350, 360, 568, 560, 600, 600A, 600M, 700, 700A, 700M, 768 and 760
Purchase them by the case of 6 and save $12.00. Please see
below. The $11.00 price below is for purchasing one water panel at a time.
Save $12.00 and purchase them by the Case of 6!
Case Price Section:
Aprilaire Model #4040 Water Solenoid Valve:
Tip: When replacing a solenoid valve with a new valve. This will prevent your new solenoid valve from getting stopped up with sediment. This is accomplished best by using two people. When replacing any solenoid valve, turn off the saddle valve (water valve). Disconnect the water line from the old valve. Hold the disconnected water line into a bucket. Second person, turn the saddle valve (water valve) back on full force to allow sediment and junk to flow into the bucket instead of stopping up the new valve. Install and connect the new solenoid valve.
The Aprilaire Model 4040 Water Solenoid valve pictured below is the exact replacement valve for Aprilaire Humidifier Models: 220, 224, 440, 550, 558 560, 568, 600, 700, 760, 768. This
solenoid valve is also the replacement valve for Bryant Carrier part #4374
and part #4357.
This is a 24 volt valve. All 4040 valves come with installation instructions and a 4004 strainer installed in the inlet side of valve. Comes from the factory in a plastic bag.

Aprilaire Part # 4331 Distribution Tray for Model 600 Humidifier
This is an old picture. Our new distribution trays have the black mesh coating on the tray instead of the white granular coating as in the picture below.

Aprilaire Part #4330 Scale Control Insert for Model 600 Humidifier
Some of our Scale Control Inserts are black instead of this white plastic you see in the picture below.

Aprilaire Part # 4231 Water Restrictor Orifices

Aprilaire RP4004 Water Line Strainer
Another problem that could cause water not to flow in your humidifier would be the water line filter strainer stopped up. The water line strainer is letter "C" in the picture below. Below is an picture with an opportunity for you to purchase.

Aprilaire Part #4335 Feed Tube With Compression Sleeve
Comes with yellow orifice and 4004 strainer.

Aprilaire Humidifier Transformer Part #4010
Aprilaire Drain Spud Part # 4223
Self Tapping Water Saddle Valve
*If you loosen the compression nut that goes into your water solenoid valve and no water comes out then there is a good possibility that you need a new saddle valve. The saddle valve has become stopped up with lime deposits or debris. Please make sure your main water supply is turned off in your home, and the pressure is relieved from the pipes by opening a faucet or two before you attempt to remove the saddle valve. You will get an unexpected shower and a mess if you don't turn off the main water supply and relieve the pressure. Below is a picture of one of my favorite saddle valves with an opportunity for you to purchase. I especially like it because it is already screwed into the base and ready to go! No pipe dope or Teflon tape needed to keep it from leaking.

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Sincerely, Steve & Barbara Arnold
Address: 11506 Seatonville Road
Louisville, KY. 40291