Arrived on site, and found water dripping out of emergency drain line. Upon inspecting the attic unit, I found water in the drain pan. Outside I found the drain line was run into an irrigation box a little too deep. Upon lifting the drain line a little out of the water, water immediately began draining out. Made drain line adjustments to shorten the pvc going into the drainage box to allow overflow. 20 degree split across the coil was measured with a 53 degree supply. Extensively tested drain line to ensure the line was clear and found it to be draining fine at this time. Unit in good working order upon departure.