Shower U-bends, (the part of the shower where the water drains into the drainpipe), can clog because of hair, minerals in hard water and soap. You must use the protective grill that goes over the plughole and prevents material from getting clogged in the drainpipe. You will ned to clean this after each time you use the shower.
These various methods enable to unclog your drainpipe
Check that nothing is blocking the plughole where the water drains away. Otherwise, remove the metal grill and simply take out whatever is blocking the pipe with your hands or a metal rod if the clog is further deep in the siphon.
If Method 1 does not work, you can try pouring boiling water in the plughole. Hot water should help unclog whatever is blocking the pipe.
Pour baking soda mixed with white vinegar into the drain. Wait 30 min then pour boiling water down the drain. This should help to get rid of the clog. Be warned that foam might be created due to the chemical reaction.
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