Each Harmony Water Softener comes with 10’ of a ½” drain line. If you need to run the drain line further than 20ft, you will need to to adjust the line from ½” to a ¾” line at the 20ft mark.
If you need to run the drain line above the unit, you can go no more than 7ft above the unit from the drain line connection point on the side of the control valve.