5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Perth Blocked Drains Plumbers on 7 Nov 2025

Blocked drains are a source of frustration that could disrupt your everyday life. They can cause smelly water damage, bad smells, and even health hazards. If they are not addressed promptly blocked drains can lead to grave problems to your plumbing system, which can lead to expensive fixes or replacings.

Key Takeaways

  • Blocked drains can disrupt your routine and can result in problems with water, bad smells and even health dangers.
  • Grease, oil and fat accumulations can stick to the pipes’ walls, causing blockages. Do not pour grease down the drain. Alternatively, make use of hot water and soap while cleaning dishes.
  • Tree roots naturally extend themselves into the ground searching for nutrients that could cause severe damages and blockages to pipes leading to flooding; regularly maintain nearby trees around drainage systems by trimming them.
  • Flushing non-biodegradable items like wet towels, wipes and sanitary pads and so on. can cause unpleasant smells that can be detected around 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 ways to keep them from happening.

Cause 1. Grease, oil and fat buildup

Oil, grease, and fat may appear like harmless materials to drain down the toilet, however, over time, they begin to accumulate on the walls of pipes causing obstruction. As a result the water can’t flow freely through drainpipes. The best solution is to refrain from the practice of pouring grease down the drain. Or make use of hot water and soap during cleaning dishes since it can help break down grease-based substances.

Cause 2: Tree Roots

The tree’s roots gradually extend their roots into the earth in search of nutrients, which leads to them expanding towards underground pipes. Once inside the pipes, tree roots could cause significant damage and even stop them from flowing, causing flooding. It’s crucial, therefore, if you are near trees to maintain their growth around drainage systems by pruning the trees regularly.

Cause 3: Flushed items

It’s easy to think that flushing non-biodegradable things like the wet wipes, sanitary towel and so on. aren’t likely to cause major issues in the end, but when too many of these items are flushed in toilets, they’ll pile up and push others away, blocking pipes – this can result in nasty smells emanating around toilets/bin areas too! Be aware of what needs to be flushed, and what shouldn’t (i. e only toilet papers should be flushed out).

Cause 4: Hair

Additional Information

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