5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Blocked Drains Plumbing Sydney on 29 Oct 2025

Blocked drains are a source of frustration that could disrupt your everyday life. They can cause the destruction of your home’s plumbing, unpleasant smells, and even health risks. If they’re not treated promptly blocked drains may cause serious problems in the plumbing system, which could lead to costly repairs or replacements.

Key Takeaways

  • Blockages to drains can cause disruption to your daily life and lead to the destruction of your home, bad smells and even health dangers.
  • The fat, oil and grease accumulation can build up on the pipes’ walls, causing blockages. Do not pour grease down the drain. Alternatively, make use of hot water and soap when washing dishes.
  • Tree roots naturally extend themselves into the ground searching for nutrients, which could cause serious damage, and also block the pipes completely which can cause flooding. Ensure you keep trees in the vicinity of drainage systems by pruning them.
  • Flushing non-biodegradable items like wet wipes, towels, and so on. can cause unpleasant smells that can be detected around bins and toilets; be sure to flush toilet paper down the toilet.
  • Hair

In this article, we’ll review five common causes of blocked drains and the best way to prevent them from happening.

Cause 1. Grease, oil and Fat buildup

Grease, oil and fat might appear to be harmless substances to dump down the drain but over time they accumulate within the wall of pipes, creating a blockage. If this happens the water can’t flow freely through the drainpipes. The best solution is to refrain from throwing grease into the drain. Alternatively, make use of hot water and soap during cleaning dishes since it can help break down grease-based substances.

Cause 2. Tree Roots

As time passes, tree roots naturally extend themselves into the ground seeking nutrients. This implies that they expand toward underground pipes. Once inside the pipes, tree roots could cause significant damage and can completely stop them from flowing, causing flooding. It’s crucial, therefore, if you have trees in the vicinity to maintain the growth of your trees around drainage systems by trimming them on a regular basis.

Cause 3: Items that are soiled

It’s easy to assume that flushing non-biodegradable things like the wet wipes, sanitary towel etc. shouldn’t cause a lot of problems over the long haul, However, if a large amount of these items are put down toilets they will resultantly in the accumulation of other items, thereby in the way of pipes. This could create unpleasant smells around bins and toilets! Always remember what should be flushed and what shouldn’t (i. the only toilet paper needs to 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 Blocked Drains Plumbing Sydney now and speak to one of our friendly team members.

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We’re here to help with all of your plumbing needs, such as blocked drains, CCTV drain inspections, drain repairs and pipe relining.

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