If the condensate drain line is clogged you will need to use a wet dry vacuum or a special pumpto unclog the line.
Bleach to clean drain pipes.
Bleach will not damage your drain pipes.
Open the drain to let the diluted bleach go down into the pipes.
On the other hand if you try to pour bleach down the drain in big amounts then yes your drain pipes will definitely be damaged and you can just throw them.
This removes any small particles that are in the drain so they don t get in the way of the bleach.
Watch this video to find out more.
One way to do this is to close the drain and pour 1 2 cup of bleach with 1 gallon of water in the tub or sink.
Just pour a cup of bleach in the drain line s access opening near the indoor air conditioning unit.
Step 2 pour 1 cup of bleach down the drain trying to pour it around all edges of the drain so it touches the sides.
This will kill any algae mold or mildew that has formed in the pipe.