5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Sydney Blocked Drains Plumber on 10 Dec 2025

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

Key Takeaways

  • Drains that are blocked can interrupt your routine and can cause 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 or use hot water and soap when washing dishes.
  • Tree roots naturally extend themselves into the earth to seek nutrients. This can cause massive damage and completely block pipes and cause flooding. It is important to regularly maintain nearby trees around drainage systems by pruning them.
  • The flushing of non-biodegradable products like wet wipes, towels, etc. can cause unpleasant smells emanating from toilets or bins. just flush toilet paper down the toilet.
  • Hair

In this post, we’ll explore five reasons for blocked drains and what you can do to keep them from happening.

Cause 1: Grease, Oil and Fat buildup

Oil, grease, and fat could appear as harmless substances to dump down the drain but they can build up in the pipes’ walls the pipes, which causes obstruction. As a result the water can’t flow freely through drainpipes. The best solution is to refrain from throwing grease in the drain, or use hot water and soap when cleaning dishes because it assists to break down greasy substances.

Cause 2. Tree Roots

In time, the tree roots naturally extend their roots into the earth looking for nutrients. This leads to them expanding towards underground pipes. Once they are inside the pipes, tree roots can cause massive damage and can completely block them, leading to flooding. Therefore, it is essential that if have trees around to maintain the growth of your trees around drainage systems by trimming them in a regular manner.

Cause 3: Flushed items

It’s easy to assume that flushing non-biodegradable things like wet towels, sanitary wipes etc. won’t cause any significant problems in the long run However, when a lot of these products are flushed in toilets, they’ll build up, pushing other items aside and in the way of pipes. This could cause unpleasant odors to emanate around the toilets and bins too! Always be aware of what should be flushed and what shouldn’t (i. it is only toilet paper should 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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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 Sydney Blocked Drains Plumber now and speak to one of our friendly team members.

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