5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Perth Blocked Drains Plumbers on 18 May 2026

Blocked drains are a source of frustration which can cause a disruption in your daily life. They can result in smelly water damage, bad smells, or even health risks. If they are not addressed promptly blocked drains could cause severe problems for your plumbing system, which can lead to expensive repairs or replacements.

Key Takeaways

  • Blockages to drains can cause disruption to your daily life and result in water damage, bad smells and even health dangers.
  • The fat, oil and grease build-up can clog the pipes’ walls, causing blockages; avoid pouring grease down the drain, or make use of hot water and soap when washing dishes.
  • Tree roots naturally grow into the soil to search for nutrients, which could cause serious damage to pipes and even completely block them that can lead to flooding. Regularly maintain nearby trees around drainage systems by trimming them.
  • Flushing non-biodegradable items like wet wipes, towels, and so on. can result in nasty smells emanating around toilets/bin areas; just use toilet paper to flush down drain.
  • Hair

In this post, we’ll explore five reasons for blocked drains and ways to avoid them.

Cause 1. Grease, Oil and fat buildup

Fat, grease, and oil may appear like harmless materials to dump down the drain but as time passes, they build up in the pipes’ walls pipes, which causes a blockage. When this occurs then water cannot flow freely through drainpipes. The best solution is to refrain from spilling grease into the drain. Alternatively, make use of hot water and soap while cleaning dishes because it assists to break down grease-based substances.

Cause 2. Tree Roots

The tree’s roots gradually expand into the soil seeking nutrients. This implies that they expand towards underground pipes. Once inside these pipes tree roots can cause substantial damage and may completely block them leading to flooding. It’s crucial, therefore, if you have trees around to maintain their growth around drainage systems by trimming them regularly.

Cause 3: Item that has been thrown away

It’s easy to assume that flushing biodegradable products such as wet wipes, sanitary towels and so on. shouldn’t cause a lot of problems in the end, but when too many of these items are flushed into toilets, they can pile up and push others away, in the way of pipes. This could create unpleasant smells around toilets/bin areas too! Always be aware of what should be flushed, and what shouldn’t (i. that only toilet paper is to have to be flushed).

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 Plumbers now and speak to one of our friendly team members.

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