That would include the main plumbing vent stack.
Main condensate drain into vent in the attic.
Once everything s connected turn on the wet dry vac and let it run for about 3 minutes.
Meaning that the drain tube coming out of.
Use no hub fittings to connect a pvc fitting to cast iron or abs pipe.
Then use duct tape to seal the gap between the hose and the drain line.
Remove the cap from the condensate drain line.
It appears that this condensate drain only drops into that vertical standpipe an inch or two and if there is still a decent opening around it to let air into the standing drain line then you got an air gap between the end of the condensate drain and the p trap below so it should.
This is a precaution that prevents the vent from.
In the attic tap into a conveniently located vent pipe.
Fix the hose attachment to the wet dry vac s hose and position it into or flush with the end of the drain line.
It didn t specify where the main drain should go but it did say to shape the drain line so it would form a trap.
This helps ensure that if a backup occurs that the water properly trips the switch instead of overflowing out of the vent.
The waste vent runs from your main drain line to prevent back pressure in the main sewer line.
Cut the pipe and connect a reducer tee fitting.
The evaporator was located in the attic.
This pipe can be interrupted at any point up to 4 feet from the vent shaft that generally exits your home from the roof or the side of the home.
Thanks to.