5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Adelaide Blocked Drains Plumber on 28 Feb 2026

Blocked drains are a hassle that can disrupt your daily life. They can cause smelly water damage, bad smells and even health hazards. If not promptly dealt with blocked drains may cause grave problems to the plumbing system, which can lead to expensive repair or even replacement.

Key Takeaways

  • The blockage of drains can affect your routine and can cause water damage, bad smells and even health dangers.
  • The fat, oil and grease build-up can clog the walls of pipes, leading to blockages. Avoid pouring grease down the drain or use hot water and soap while cleaning dishes.
  • Tree roots naturally extend into the ground searching for nutrients that could cause severe damage, and also block the pipes completely leading to flooding; regularly maintain the trees surrounding drainage systems by trimming them.
  • Wet wipes, sanitary towels etc. can create unpleasant smells that can be detected around bins and toilets; only flush toilet paper down the drain.
  • Hair

In this post, we’ll explore five reasons for blocked drains and the best way to prevent them from happening.

Cause 1. Grease, oil and Fat Buildup

Oil, grease, and fat could appear as harmless substances to drain down the toilet, however, over time, they begin to accumulate within the wall of pipes, which causes an obstruction. When this occurs, water is unable to flow freely through drainpipes. It is best to avoid the practice of pouring grease down the drain. Or use soap and hot water while cleaning dishes because it assists to remove greasy substances.

Cause 2. Tree Roots

The tree’s roots gradually expand into the soil seeking nutrients. This results in them growing towards underground pipes. Once inside the pipes, tree roots could cause significant damage and even block them, causing flooding. It’s crucial, therefore, if you are near trees to maintain the growth of your trees around drainage systems by trimming them regularly.

Cause 3: Item that has been thrown away

It’s not difficult to conclude that flushing items that aren’t biodegradable like toilet paper, wet wipes and so on. will not cause any major problems in the long term, However, when a lot of these products are flushed into toilets, they can pile up and push others away, which can result in nasty smells emanating around toilets/bin areas too! Always remember what should be flushed away and what should not (i. e only toilet paper should be flushed out).

Cause 4 Cause 4: Hair

Additional Information

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Are you experiencing a clogged toilet, blocked shower drain, overflowing drains or an issue with your kitchen sink? We can help you sort out your drain blockage problem quickly and provide the following services:

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Clearing blocked drains can be difficult and it’s best to get a professional plumbing service involved to tackle it for you, To get your blocked drain in Adelaide cleared today, contact Adelaide Blocked Drains Plumber now and speak to one of our friendly team members.

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