What Are The Top Causes Of Blocked Drains?

a clean kitchen sink

Blocked drains are one of the main reasons why Australian families require the services of a plumber, yet it is a problem that can be easily prevented. If a bad drain is left unremedied, eventually it could lead to more complex problems such as flooding, which are more time to consume and expensive to deal with.
It is important to take action to perform a drain unblocking as soon as possible, and if necessary to call for the services of a professional. However, it makes sense to try to avoid the situation arising in the first place. Knowing what may cause your drains to become blocked will enable you to put some measures in place that will keep your drainage system in good working order. Many people are unaware of the various causes of blocked drains, so here we look at some of the major culprits.

Cooking Fat

The primary cause of blocked kitchen drains is cooking fat and grease. Fat is sticky and therefore if you wash it down the sink while draining foods or while washing up it will attach itself to the interior of the pipes, blocking up the drain and preventing water from passing through. Luckily, this is a problem that can be easily avoided. Avoid pouring any fats down your sink and use a grease trap in your plug hole to prevent any accidental fat spillages from getting into the pipes.


The main reason for blocked bathroom drains is loose hair. While individual strands are narrow and delicate, eventually hair builds up over time to prevent water draining through your shower or bath plug hole.
While you cannot stop washing your hair altogether, there are several products that you can buy to prevent hair getting into your pipes.
A hair trap will fit into your plug hole and catch hair before it can get into the drain, allowing you to empty it into the bin.

Foreign Objects

It can be very surprising to discover that many people dispose of all kinds of items down their toilets or sinks. Nappies and sanitary items may not immediately cause a blockage, but over time they will cause a clog that may cause your toilet to overflow, resulting in an unhygienic problem. Remember that you should only ever flush away toilet paper and that any other foreign objects should be disposed of in a bin.

Baby Wipes And Toilet Roll

professional operating on a drainAlthough toilet roll is designed to be flushed away, sometimes it can cause a blockage if it is disposed of in large amounts. Clumps of toilet paper can cause a mass which becomes attached to the interior of the drainpipe causing it to become obstructed.

Baby wipes should not be disposed of in a toilet as they are thicker than toilet paper and therefore do not disperse in the same way. Always throw baby wipes away in a bin rather than flushing them away.


Outdoor drains often become blocked by fallen leaves, and therefore taking care to maintain your garden regularly and to put any debris in the bin is the best way to prevent this problem from occurring.

Taking care to follow these simple guidelines is the best way to prevent your drains from becoming blocked, however, if you are already experiencing a problem, you should immediately take action to rectify the problem before it gets out of hand.