Just pour a cup of bleach in the drain line s access opening near the indoor air conditioning unit.
Bleach to clean drain pipes.
Open the drain to let the diluted bleach go down into the pipes.
Watch this video to find out more.
This removes any small particles that are in the drain so they don t get in the way of the bleach.
If you use bleach properly and with caution there s no need to worry about any possible problems that might occur with your drain pipes.
Bleach will not damage your drain pipes.
Run hot water down the drain for a minute or two.
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 will kill any algae mold or mildew that has formed in the pipe.
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.