No, this is not a "typical" topic but it is an important one.
My sink drain connects to my shower drain. Sometimes the sink backs up.
If I plunge the drain, I usually manage to push the blockage to the shower drain, resulting in two blocked drains.
I pondered the problem, and worked out that a "one two punch" using liquid drain cleaner does the job.
First, I pour an entire bottle of liquid drain cleaner down the sink. Sure, it may result in a blockage of the shower, but at least I know where the blockage is.
Then, I''ll clear the shower drain with liquid drain cleaner as well.
There are two kinds of liquid drain cleaner: acid and alkali. You want alkali unless you have something serious down the drain. This is still dangerous stuff, so observe the safety instructions.
Alkali drain cleaner works really well on hair, soap buildup, and organic "films" that grow in drains.
It is also important to follow use of the drain cleaner with LOTS OF HOT WATER to flush the (partially) dissolved clog all the way out (or it will be like when the sink clog has clogged the shower drain).
Three bottles did the job. Much cheaper than a plumber.
