How to Clean AC Drain Line
                      How to Clean AC 
Drain Line
Cleaning your AC drain line is important to prevent clogs and blockages and 
prevent algae and mold from growing. You can clean the drain line using vinegar 
or bleach. Pour the liquid into the drain using a funnel and let it sit for a few hours
before flushing the pipe with warm water. If you see standing water in the drain 
pan, your drain line is probably clogged. Use a handheld or shop vacuum to 
remove the moisture. You can also use rags to soak up the water. At this point, 
you can clean the drain pan with soap. If you have a shop vacuum, use it to pull 
the clog through the drain opening, which is located outside your house near the 
foundation. Place your hand around the pipe to improve suction and allow the 
vacuum to run for a minute. 
Then, check the vacuum canister to see if the clog was successfully removed. 
Next, you'll need to identify the access point on the drain line. Usually, the drain 
will have a T-shaped vent with a PVC cover. Remove the cover and inspect the 
drain. Use this port to flush the drain with distilled vinegar. If you don't like the 
odor, you can use peroxide to gently bubble away the remaining debris. 
Alternately, you can use hot water and a drop of dish liquid. Allow the solution to 
sit for 30 minutes. Complete the cleaning by flushing the pipe with water. Have a 
helper watch the pipe outside and tell you if the water is running freely.