For this job I perform to evaluation. Upon arrival homeowner let me know that it looks like the HVAC system had been draining from the secondary not the primary. Primary drain line was clogged and there was a piece of pipe too long at the sink obstructing the way of water flow. I cut the pipe shorter so that it would not obstruct the water flow anymore, unclogged the drain and reset the trap. I tested the drain line with two gallons of water with homeowner no abnormalities were noted during the test on second gallon. Thank you for choosing come for experts have a great day!