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Bathtub Drain Backing Up

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  • Posted date:
  • 12-03-2019

It is quite common to see sediments such as soap scum, hair and other debris in your bathroom sink or tub. This is no cause to worry. However, when you drain water, and the water backs up, this should raise the alarm because it means that there is a clog in your drain.


It is important to note that your toilet sink, shower and bathtub drain the dirty water into the sewer line. The sewer line connects to these three and runs out to the city’s sewer line or your septic tank. If you notice that the dirty water is coming up in your bathtub, and reeks of raw sewage, this is an indication that there is a sewer line problem. This could lead to some severe issues, and failure to address this would lead to grave damage.

The main cause for a clog in the sewer line is flushed items, grease build up and among others. In such a case, plunging does not work because it is only meant for unclogging the toilet itself and not the sewer line. If you suspect you have a main sewer line clog, get a professional plumber to check and sort the problem right away. This is an important step on how to solve water coming through the bathtub drain. The following are three messy signs to check out to see whether there is a clog in your main sewer line.

woman using plunger to unblock sink

Problems when using plumbing fixtures

Water can only go back up to your home whenever there is a main sewer line clog. There is a possibility of such a clog when you:

  • Notice bubbles coming from the toilet when you run the sink closest to it, or the water level in the toilet rises.
  • Flush the toilet, and the water backs up into the shower drains or bathtub
  • Use your washing machine and notice the toilet overflowing or water backing up into the bathtub or shower.

Bad sewage smell coming from your drains

When there is dirty water coming from your shower drain or bathtub and reeks of raw sewage, then that is a definite sign of a clog in your main sewer line. This smell is quite unpleasant; it will be hard to miss it.


Are you experiencing a drain blockage? Have you tried every DIY method? If you require emergency drain unblocking in North London follow the link below for professional drain clearance services.