5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Melbourne Blocked Drains Plumbers on 14 Mar 2026

Blocked drains are a hassle which can cause a disruption in your daily life. They could cause the destruction of your home’s plumbing, unpleasant odours, and even health risks. If they are not addressed promptly blocked drains can lead to severe problems for the plumbing system, which could lead to expensive repair or even replacement.

Key Takeaways

  • The blockage of drains can affect your routine and can lead to flooding, unpleasant smells and even health dangers.
  • Grease, oil and fat build-up can clog the walls of pipes, leading to blockages. Do not pour grease down drains or use hot water and soap to wash dishes.
  • Tree roots naturally extend themselves in the ground to find nutrients which may cause significant damage to pipes and even completely block them leading to flooding; regularly maintain nearby trees around drainage systems by pruning them.
  • Wet toiletries, wipes, and so on. could cause unpleasant odors emanating from bins and toilets. only flush toilet paper down the toilet.
  • Hair

In this article, we’ll examine five of the most 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 flush down the drain, but they can build up in the pipes’ walls the pipes causing an obstruction. When this occurs it is impossible for water to flow freely through the drainpipes. The best solution is to refrain from pouring grease in the drain, or use hot water and soap while cleaning dishes as it helps break down grease-based substances.

Cause 2. Tree Roots

The tree’s roots gradually extend themselves into the ground seeking nutrients. This means that they grow toward underground pipes. Once they are inside the pipes, tree roots can cause massive damage and may completely block them leading to flooding. Therefore, it is essential that if have trees around that you regularly maintain their growth around drainage systems by trimming them in a regular manner.

Cause 3: Unwanted items

It’s easy to think that flushing biodegradable products such as wet towels, sanitary wipes and so on. will not cause any major problems over the long haul, however, if too many of these items go in toilets, they’ll accumulate pushing others aside blocking pipes – this can result in nasty smells emanating around toilets/bin areas too! Always be aware of what should be flushed and which shouldn’t (i. the 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 Melbourne cleared today, contact Melbourne Blocked Drains Plumbers now and speak to one of our friendly team members.

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