5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Perth Blocked Drains Plumbing on 9 Jan 2026

Blocked drains are an inconvenience that could disrupt your everyday life. They can lead to flooding, bad smells, and even health hazards. If they’re not treated promptly blocked drains could cause grave problems to your plumbing system, resulting in expensive repair or even replacement.

Key Takeaways

  • Blockages to drains can cause disruption to your routine and cause the destruction of your home, bad smells, and even health risks.
  • The fat, oil and grease accumulations can stick to the walls of pipes causing blockages. Avoid pouring grease down drains or make use of hot water and soap for cleaning dishes.
  • Tree roots naturally extend into the soil to search for nutrients. This can cause massive damages and blockages to pipes which can cause flooding. Ensure you keep trees in the vicinity of drainage systems by pruning them.
  • The flushing of non-biodegradable products like wet wipes, towels, and so on. can create unpleasant smells emanating around toilets/bin areas; just use toilet paper to flush down drain.
  • Hair

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

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 on the walls of the pipes, creating the pipes to become blocked. If this happens, water is unable to move freely through the drainpipes. The solution is to stop pouring grease into the drain. Alternatively, utilize soap and hot water to wash your hands when cleaning dishes, as this helps break down grease-based substances.

Cause 2. Tree Roots

As time passes, tree roots naturally extend into the ground looking for nutrients. This leads to them expanding towards underground pipes. Once inside the pipes, trees roots can cause a lot of damage and even block them leading to flooding. Therefore, it is essential that if have trees nearby that you maintain the growth of your trees in the drainage system by trimming them in a regular manner.

Cause 3: Item that has been thrown away

It’s not difficult to conclude that flushing items that aren’t biodegradable like the wet wipes, sanitary towel etc. won’t cause any significant problems in the long term, however, if too many of these items are put into toilets, they can in the accumulation of other items, thereby which can cause a bad smell to be released around bins and toilets! Be aware of what needs to be flushed away and what should not (i. the only toilet paper is to be flushed away).

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 Perth cleared today, contact Perth Blocked Drains Plumbing 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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