5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Perth Blocked Drains Plumbing on 9 Jan 2026

Blocked drains are a hassle which can cause a disruption in your daily life. They could cause flooding, bad smells, and even health risks. If not dealt with promptly blocked drains could cause severe problems for the plumbing system, leading to costly repairs or replacements.

Key Takeaways

  • Blocked drains can disrupt your day-to-day routine and result in water damage, bad smells and even health dangers.
  • Oil, grease and fat accumulation can build up on the walls of pipes causing blockages. Do not pour grease down the drain or use hot water and soap for cleaning dishes.
  • The roots of trees naturally expand into the soil to search for nutrients that could cause severe damage and completely block pipes that can lead to flooding. Regularly maintain the trees surrounding drainage systems by trimming them.
  • Flushing non-biodegradable items like wet wipes, towels, and so on. can result in nasty smells emanating from toilets or bins. be sure to flush toilet paper down the toilet.
  • Hair

In this post, we’ll review five common causes of blocked drains and how you can avoid them.

Cause 1: Grease, Oil and Fat Buildup

Fat, grease and oil may appear like harmless materials to pour down the drain but as time passes, they build up over the insides of pipes causing the pipes to become blocked. In this case the water can’t flow freely through drainpipes. The solution is to avoid spilling grease down the drain. Or make use of hot water and soap to wash your hands when cleaning dishes, as this helps remove greasy substances.

Cause 2: Tree Roots

The tree’s roots gradually expand into the soil searching for nutrients which results in them growing toward underground pipes. Once inside the pipes, tree roots can cause substantial damage and can completely stop them from flowing, causing flooding. It’s crucial, therefore, if you have trees around to regularly monitor the growth of your trees around drainage systems by trimming them on a regular basis.

Cause 3: Item that has been thrown away

It’s easy enough to believe that flushing biodegradable products such as wet wipes, sanitary towels etc. shouldn’t cause a lot of problems in the long run however, if too many of these items are put down toilets they will resultantly accumulate pushing others aside in the way of pipes. This could result in nasty smells emanating around bins and toilets! Be aware of what needs to be flushed away and what should not (i. it is only toilet paper needs to be flushed out).

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 Perth cleared today, contact Perth Blocked Drains Plumbing now and speak to one of our friendly team members.

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When it comes to plumbing, you want to make sure you’re working with a qualified professional. At our company, we are licensed and insured professionals who are dedicated to providing quality plumbing services.

We’re here to help with all of your plumbing needs, such as blocked drains, CCTV drain inspections, drain repairs and pipe relining.

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