5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Sydney Blocked Drains Plumber on 10 Dec 2025

Blocked drains are an inconvenience that could cause disruption to your daily life. They can lead to water damage, bad smells, and even health risks. If they are not addressed promptly, blocked drains can cause serious issues in your plumbing system, which could lead to costly repair or even replacement.

Key Takeaways

  • Drains that are blocked can interrupt your daily life and lead to flooding, unpleasant smells, and even health risks.
  • Grease, oil and fat accumulations can stick to the pipes’ walls, causing blockages. Do not pour grease down the drain, or use hot water and soap when washing dishes.
  • Tree roots naturally extend themselves into the soil to search for nutrients, which could cause serious damages and blockages to pipes leading to flooding; regularly maintain trees near drainage systems by trimming them.
  • Flushing non-biodegradable items like wet wipes, towels, and so on. can create unpleasant smells that can be detected around bins and toilets; only take care to wash your toilet paper in the toilet.
  • Hair

In this article, we’ll look at five common reasons for blocked drains and ways to avoid them.

Cause 1: Grease, Oil and fat buildup

Fat, grease and oil may appear like harmless materials to dump down the drain but as time passes, they build up in the pipes’ walls the pipes, causing a blockage. As a result, water is unable to move freely through the drainpipes. The solution is to avoid the practice of pouring grease down the drain or make use of hot water and soap when cleaning dishes since it can help dissolve greasy substances.

Cause 2. Tree Roots

The tree’s roots gradually expand into the soil in search of nutrients, which results in them growing toward underground pipes. Once they’re inside, the tree roots can cause massive damage and could completely block them, leading to flooding. It is therefore essential if you have trees around to regularly monitor their growth around drainage systems by trimming them on a regular basis.

Cause 3: Item that has been thrown away

It’s easy enough to believe that flushing biodegradable products such as toilet paper, wet wipes and so on. aren’t likely to cause major issues in the long run however, if too many of these items are flushed into toilets, they can in the accumulation of other items, thereby in the way of pipes. This could create unpleasant smells around bins and toilets! Be aware of what needs to be flushed, and what shouldn’t (i. it is only toilet papers should be flushed out).

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 Sydney cleared today, contact Sydney Blocked Drains Plumber now and speak to one of our friendly team members.

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