The Top Signs That Indicate You Have a Drain Blockage

Name: Blocked Drain Sydney
Brand: Blocked Drains Plumbing Sydney
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Posted by Blocked Drains Plumbing Sydney on 8 Nov 2025

Dealing with a blocked drain can be frustrating, and it’s always best to catch the problem early. We have compiled a list with signs to watch for when you are dealing with blocked drains.

Slow Draining

If your sink or bathtub takes longer than normal to drain, you may have a blockage. This is the most obvious sign of a blocked drain. It could be caused by something as simple as a buildup of hair, soap, or grease.

Foul Odors

Foul odors coming from drains can indicate that there’s a blockage somewhere in your pipes. The smell could be caused by anything from rotting food stuck in your kitchen sink to organic matter caught in your bathroom’s waste pipe.

Strange Noises

Gurgling noises coming from your pipes is another clear sign that you may have a blocked drain. These sounds are often heard when water drains from toilets and sinks. These noises are often caused by trapped air trying to escape from the blockage.

Water Backing Up

If water backs up into other fixtures like toilets or sinks when you’re using appliances such as washing machines or dishwashers, it’s very likely that you have a blocked drain. If left untreated, water backup can lead to further issues such as flooding.

What To Do About A Blockage

Now that we’ve covered some of the signs of blocked drains let’s take a look at what you should do if you suspect there’s an issue with yours:

Use A Plunger: A plunger can help dislodge any small blockages within your pipes.
Pour Boiling water: Pouring boiling hot water down the drain can break down soap scum, and help melt any grease or fats.
Try A Store-Bought Drain Cleaner: Be careful when using these as some can damage pipes over time. Alternatively, you can make your own homemade drain cleaner by mixing baking soda and vinegar.

If none of these solutions work, it’s time to call in a professional plumber. They will have the necessary tools and expertise to locate and effectively remove any blockages in your pipes.

Conclusion

Blocked drains are frustrating and can cost you money. However, catching them early will help prevent future damage. You’ll quickly be able to identify the signs that we have discussed and take appropriate action.

Key Takeaways

Slow draining is a common sign of a blocked drain caused by a buildup of hair, soap or grease.
Foul odors emanating from your drains could indicate blockage caused by organic matter stuck in your pipes.
Gurgling noises coming from your pipes are usually heard when water is draining from sinks or toilets – they may denote trapped air trying desperately to escape through the blockage.
Water backing up into other fixtures indicates that there might be an issue with your drainage system.
There are many solutions, starting with a plunger