5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Perth Blocked Drains Plumber on 7 Dec 2025

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, and even health hazards. If they are not addressed promptly blocked drains could cause grave problems to your plumbing system, leading to costly repair or even replacement.

Key Takeaways

  • The blockage of drains can affect your daily life and result in flooding, unpleasant smells, and even health issues.
  • Fat, oil and grease accumulation can build up on the pipes’ walls causing blockages. Avoid pouring grease down drains or make use of hot water and soap to wash dishes.
  • The roots of trees naturally expand into the earth to seek nutrients that could cause severe damage and completely block pipes and cause flooding. It is important to regularly maintain trees near drainage systems by pruning them.
  • Flushing non-biodegradable items like wet towels, wipes and sanitary pads etc. can create unpleasant smells emanating from bins and toilets. make sure to use toilet paper to flush down drain.
  • Hair

In this article, we will examine five of the most common causes of blocked drains and how you can keep them from happening.

Cause 1. Grease, oil and fat buildup

Fat, grease and oil may seem like harmless substances to pour down the drain however, over time, they begin to accumulate in the pipes’ walls the pipes causing obstruction. If this happens, water is unable to move freely through the drainpipes. The solution is to stop throwing grease into the drain. Alternatively, use hot water and soap during cleaning dishes because it assists to remove greasy substances.

Cause 2: Tree Roots

Over time tree roots naturally extend their roots into the earth searching for nutrients which means that they grow toward underground pipes. Once inside the pipes, trees roots can cause a lot of damage and could completely block them leading to flooding. Therefore, it is essential that if have trees nearby that you maintain their growth around drainage systems by pruning them regularly.

Cause 3: Items that are soiled

It’s easy enough to believe that flushing items that aren’t biodegradable like wet wipes, sanitary towels and so on. will not cause any major problems in the long term, but when too many of these products are flushed into toilets, they can pile up and push others away, in the way of pipes. This could cause unpleasant odors to emanate around bins and toilets! Be aware of what needs to be flushed and what shouldn’t (i. e only toilet paper should 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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