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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. Below we have parts with an opportunity for you to purchase.

Below we have many of the parts and supplies that you need to keep your Aprilaire 550 Humidifier in top working condition! 

The Aprilaire Stock #10 Evaporative Media Water Panel Below fits Aprilaire Models 110, 220, 500, 500A, 500M,  550A, 550 & 558 

Aprilaire Stock #10 Case Pricing Section:

Save $6.00 and purchase them by the case of 6!

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, 760 768. This valve is also the replacement valve for Bryant Carrier part #4374.

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 550 Part # 4231 Water Restrictor Orifices

Aprilaire 550 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 550 Water Distribution Tray Part #4218

Aprilaire 550 Scale Control Insert Part #4217

Aprilaire 550 Feed Tube with Compression Sleeve Part #4226

Aprilaire Nozzle Part # 4184

 One Nozzle is included with each order. The above pictures shows the two colored nozzles both are the same, only different colors. You would receive either a white or a black nozzle with your order.

Aprilaire Drain Spud Part # 4223

Our next humidistat is the Aprilaire Model #4655. This is a regular analog manual humidistat that comes with the Aprilaire 550 humidifiers and many other Aprilaire manual control humidifiers. This humidistat comes with mounting screws, installation instructions and operating instructions.

Aprilaire Humidifier Transformer Part #4010

Sorry, No Returns on Electrical, Electronic Products Once they Have Been Installed. Please see our return policy.

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. 

Aprilaire 550, 550A, 558/ 560, 560A, 568 Complete Parts List:

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