AprilAire 4335 Feed Tube With Sleeve
AprilAire 4335 Feed Tube With Sleeve
For 400, 500, and 600 Whole-House Humidifiers



- Maintain peak performance of your Indoor Air Quality solution with genuine replacement parts and quality you can trust.
- Compatible Models: 400, 400A, 400K, 400M, 400MK, 400MZ, 400Z, 400KZ, 400MKZ, 500, 500A, 500K, 500M, 500MK, 500MZ, 500Z, 500KZ, 500MKZ, 600, 600A, 600K, 600M, 600MK, 600MZ, 600Z, 600KZ, 600MKZ, 4788, 4792, 4839
- Materials: Polypropylene
- Actual Measurements: 0.25H x 0.25W x 21.5D (inches)
INCLUDED IN THE BOX:
- Feed Tube
- 4004 In-Line Strainer
- 4231 Yellow Orifice
- Compression Nut
- Compression Sleeve
The AprilAire 4335 Feed Tube with Sleeve 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 unit.
The feed tube should be securely attached to the solenoid using a compression sleeve and nut, routed through the humidifier in a manner that allows free flow of water and then inserted into the feed tray far enough to be stopped by the feed tray’s limiting element. Features 1/4-inch Outer Diameter and 3/16-inch Inner Diameter.
Also see humidifier Maintenance Kits 4788 (400 Series), 4792 (500 Series), and 4839 (600 series) for all maintenance parts in one kit.

AprilAire Is Healthy Air
AprilAire is on a mission to make homes healthy. We believe everyone deserves Healthy Air and envision a future with Healthy Air in every home.
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By The Numbers
70 years of filling homes with Healthy Air! Our mission has always been to make homes healthy, creating whole-house solutions inspired by the needs of our customers.
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Invisible Pollutants
Just because you can’t see airborne allergens, doesn’t mean they’re imaginary. Put your health and home first with AprilAire whole-house solutions.
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Healthy Homes
70 years of filling homes with Healthy Air! Our mission has always been to make homes healthy, creating whole-house solutions inspired by the needs of our customers.
