Feed Tube 4226 with compression sleeve for Aprilaire humidifier Model 550. This tubing connects to the solenoid and feeds water to the water distribution tray. The plastic tubing is 1/4" OD and 27" length. Includes strainer, yellow orifice, brass compression fitting and plastic ferrule. Yellow orifice sized to deliver 3 gph.
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 500,
unless the feed tube is cut down. The 500 humidifier require 21" long feed tube known as Aprilaire 4335