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- The 4217 Aprilaire Scale Control Insert is for Models 550, 550A and 558.
- The Aprilaire Scale Control Insert 4217 is the u-shaped part which encases the Water Panel Evaporator.
- The purpose of the 4217 is to direct any mineral which builds up back into the evaporative panel.
- The 4217 prevents water from leaving the evaporative section and entering another portions of the humidifier.
- The 4217 is used with water panel number/stock number 10 and water distribution tray part number 4218.
- Please click here if you are interested in seeing the 4218 water distribution tray.
- Please click here if you are interested in seeing the Aprilaire stock #10 water panel evaporative pads.
- If you have any questions please email us anytime: email@example.com
- We would love to help you out and have your business!