Toilet Backing Up into a Shower: Causes & Solutions


A toilet backing up into a shower is a serious problem, which needs immediate attention. A clog in the main drain may be the cause of this kind of situation and if so, eventually all other plumbing drain lines will back up too. But, if a shower and toilet have the same drainpipe then this problem will be seen in these two areas only.

There can be a number of causes to why a toilet backs up into a shower.

  • Over time waste will stick to the sewer line’s wall. So, human wastes and food wastes along with oil from these wastes sticks to the walls and accumulate around other foreign particles like hair.
  • Similarly if any foreign items, like diapers or tampons, small items like a kid’s toy and even large wads of toilets paper are flushed down a toilet, then it can cause blockage too.

How to get rid of this problem?

  1. If a clog is not that big then, it can be removed with the help of a plunger. If this step is not working, then it will be best to get the help of a person who will be in charge of plunging the shower drain simultaneously when you are using a plunger on the toilet. This step increases the thrust and gets great result.
  1. If the above step did not work then, it will be best to use snaking equipment to get rid of the unwanted clog.
  1. If it is seen that none of the above methods works, then the cause of the jam can be something else. It can either be tree roots cracking the pipes and entering the sewer line or collapsing of the line due to wear and tear. In such a situation, it will be best to hire a professional who will address the problem and solve it.