5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Adelaide Blocked Drains Plumber on 28 Feb 2026

Blocked drains can be a nuisance that can disrupt your daily life. They can lead to flooding, bad smells and even health risks. If they’re not treated promptly blocked drains can lead to serious issues in your plumbing system, which could lead to costly maintenance or repairs.

Key Takeaways

  • Drains that are blocked can interrupt your day-to-day routine and cause flooding, unpleasant smells, and even health issues.
  • Oil, grease and fat accumulation can build up on the pipes’ walls causing blockages; avoid pouring grease down the drain or use hot water and soap when washing dishes.
  • Tree roots naturally extend in the ground to find nutrients. This can cause massive damage to pipes and even completely block them and cause flooding. It is important to regularly maintain the trees surrounding drainage systems by pruning them.
  • Disposing of non-biodegradable materials like wet wipes, towels, etc. can result in nasty smells emanating from bins and toilets. be sure to wash toilet papers down toilet.
  • Hair

In this post, we’ll review five common reasons for blocked drains and what you can do to avoid them.

Cause 1: Grease, Oil and Fat buildup

Fat, grease, and oil could appear as harmless substances to dump down the drain but over time they accumulate on the walls of the pipes, creating an obstruction. In this case the water can’t move freely through the drainpipes. The best solution is to refrain from spilling grease into the drain. Alternatively, use hot water and soap during cleaning dishes, as this helps break down greasy substances.

Cause 2: Tree Roots

The tree’s roots gradually extend into the ground looking for nutrients. This leads to them expanding toward underground pipes. Once they are inside the pipes, tree roots could cause significant damage and can completely block them, causing flooding. Therefore, it is essential that if have trees nearby to maintain their growth around drainage systems, by trimming them in a regular manner.

Cause 3: Items that are soiled

It’s easy to assume that flushing biodegradable products such as toilet paper, wet wipes etc. shouldn’t cause a lot of problems in the long term, However, if a large amount of these items are put into toilets, they can pile up and push others away, that block pipes. This can result in nasty smells emanating around bins and toilets! Always remember what should be flushed away and what should not (i. that only toilet paper needs to have to be flushed).

Cause 4 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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