5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Sydney Blocked Drains Plumbing on 29 Dec 2025

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

Key Takeaways

  • Blockages to drains can cause disruption to your routine and result in the destruction of your home, bad smells, and even health risks.
  • Grease, oil and fat buildup can accumulate on the pipes’ walls causing blockages. Do not pour grease down drains or use soap and hot water for cleaning dishes.
  • Tree roots naturally grow into the ground searching for nutrients, which could cause serious damage and completely block pipes and cause flooding. It is important to regularly maintain nearby trees around drainage systems by trimming them.
  • The flushing of non-biodegradable products like wet wipes, towels, etc. can result in nasty smells emanating from bins and toilets. make sure to use toilet paper to flush down toilet.
  • Hair

In this article, we’ll review five common reasons for blocked drains and the best way to stop them from happening.

Cause 1: Grease, Oil and fat buildup

Oil, grease, and fat could appear as harmless substances to pour down the drain but over time they accumulate on the walls of the pipes, creating the pipes to become blocked. When this occurs, water is unable to move freely through the drainpipes. The solution is to avoid pouring grease down the drain or utilize soap and hot water during cleaning dishes since it can help remove greasy substances.

Cause 2. Tree Roots

In time, the tree roots naturally expand into the soil looking for nutrients. This leads to them expanding toward underground pipes. Once they are inside the pipes, trees roots can cause a lot of damage and even stop them from flowing, causing flooding. It is therefore essential if you are near trees to maintain their growth in the drainage system by trimming them regularly.

Cause 3: Item that has been thrown away

It’s easy enough to believe that flushing non-biodegradable items like wet wipes, sanitary towels and so on. won’t cause any significant problems over the long haul, However, if a large amount of these items are put in toilets, they’ll pile up and push others away, blocking pipes – this can cause a bad smell to be released in the vicinity of toilets or bins! Be aware of what needs to be flushed and what shouldn’t (i. that only toilet papers should be flushed).

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 Plumbing now and speak to one of our friendly team members.

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