5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Melbourne Blocked Drains Plumber on 9 Aug 2026

Blocked drains are a hassle that can disrupt your daily life. They can cause water damage, bad odours, and even health risks. If they are not addressed promptly blocked drains can lead to serious issues in the plumbing system, which could lead to costly repair or even replacement.

Key Takeaways

  • Blocked drains can disrupt your day-to-day routine and lead to problems with water, bad odours and even health hazards.
  • Grease, oil and fat accumulation can build up on the pipes’ walls, causing blockages. Do not pour grease down drains or use soap and hot water when washing dishes.
  • Tree roots naturally extend themselves into the ground searching for nutrients, which could cause serious damage to pipes and even completely block them leading to flooding; regularly maintain nearby trees around drainage systems by pruning them.
  • Wet wipes, towels, and so on. can result in nasty smells that can be detected around bins and toilets; be sure to wash toilet papers down toilet.
  • Hair

In this post, we’ll examine five of the most common reasons for blocked drains and what you can do to keep them from happening.

Cause 1: Grease, Oil and Fat buildup

Fat, grease, and oil may seem like harmless substances to flush down the drain, but as time passes, they build up within the wall of the pipes causing obstruction. When this occurs it is impossible for water to move freely through the drainpipes. The solution is to avoid pouring grease down the drain. Or utilize soap and hot water when cleaning dishes, as this helps remove greasy substances.

Cause 2: Tree Roots

In time, the tree roots naturally extend into the ground searching for nutrients which results in them growing towards underground pipes. Once they are inside the pipes, tree roots can cause substantial damage and can completely block them, causing flooding. It is therefore essential if you have trees around to regularly monitor the growth of your trees around drainage systems, by trimming the trees regularly.

Cause 3: Items that are soiled

It’s easy to assume that flushing items that aren’t biodegradable like the wet wipes, sanitary towel and so on. will not cause any major problems over the long haul, however, if too many of these products are flushed in the toilets, they’ll in the accumulation of other items, thereby which can result in nasty smells emanating around the toilets and bins too! Always remember what should be flushed away and what should not (i. it is only toilet paper is to be flushed away).

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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