The Aprilaire 4335 Feed Tube with compression sleeve is used in the Model 600, 600A, 600M, 500, 500A, 500M and 400A. This tubing connects to the solenoid and feeds water to the water distribution tray. The plastic tubing is 1/4" OD and 21½" length. Includes strainer, yellow orifice, brass compression fitting and plastic ferrule. Yellow orifice sized to deliver 3 gph.
NOTE: Not compatible with model 560, 560A and 568. The 560 series require the 29-1/4" long feed tube known as Aprilaire 4266. Not compatible with model 550 either. The model 550 requires the 27" long feed tube known as Aprilaire 4226.