The setup:

Air-handler in attic
Drain line leaking somewhere in between 2nd and 1st floor.

My thought:

Run new drain line.

The problem: I ran 20 ft of 3/4 PVC to the opposite end of the attic because it had easy access to drill in to the wall and add a drain outlet. The PVC is at an angle and the drain outlet is 8-12 inches below the handler line.

After the first day there was water in the opening after the p-trap and if I went to the outside drain and did a quick syphon the water flowed out.

Since the water was coming out the presumable breathing hole I added a temp plug but is this the best thing to do or should I do something different?

Help please......