How do I know if my drain is blocked?

If your drains have a nasty smell or the drains are backing up, chances are you have blocked drains. The blockage doesn't happen overnight, it takes time to accumulate but once it gets too much, it will become obvious very quickly.

In this article, we discuss the signs of blocked drains and the possible reasons behind the blockage. By being aware of the signs and reasons for blocked drains , you can be proactive and take steps to fix the problem ASAP.

Common signs of blocked drains to look out for

Foul smell from the drains

As the objects in the pipes decompose, they will produce a foul smell. It would be hard to miss a sewage smell. The stench would most likely be around the toilet, kitchen or bathroom sinks and drains or drains outside the home.

Gurgling sound from the toilet, sink or shower

A gurgling sound is produced when a blockage is preventing water from flowing freely through the pipes. As the water flows slowly through the pipes, the trapped air releases and produces a gurgling sound. If the pipes sound unusual it is a telltale sign of a blockage.

Slowly draining water

If there’s a blockage, it will not allow the water to flow freely through the pipes. It could be localised to a single pipe or could be in the sewer drain.

How to unblock drains?

If you are noticing any of these signs, it is time to tackle the issue before water starts backing up in your home. If the blockage is in your premises, it is your responsibility to get the blocked drains fixed. However, if your neighbours are also facing the same issue, the blockage could be in the council’s line. In that case, report it to your local council.

If the problem is in your line and you want to try some DIY hacks to solve the problem yourself - check out our guide on How to unblock a drain?

Why is your drain blocked?

• Tree roots - Tree roots are a major concern for pipes. The roots can invade the pipes through even tiny cracks. Cracks can occur in pipes through the shifting of soil, wear and tear or poor installation.
• Flushing foreign objects - flushing objects like toys, tampons, or wet wipes can get lodged in the pipes.
• Hair buildup
• Fat, oil, and grease - Fatburg clog
• Cracked or damaged old pipes

How to maintain healthy drains?

• Only flush the 3Ps - pee, paper and poop
• Collect grease and dispose of it in the bin instead of flushing it down the sink
• Get the drains inspected annually by a blocked drain plumber
• Some signs of blocked drains are slowly draining water, gurgling sound from the drains & nasty smell. If you notice these signs, call a plumber ASAP.