10 Common Causes of Blocked Drains and How to Fix Them

Drain Plumber in Brisbane

Table of Contents

A blocked drain is one of the most common causes for concern when it comes to plumbing and, while not usually serious, can cause you quite the headache and mean your water system is out of action for a day or even a week.

Here at Same Day Trades, we’ve put together a full guide to the most common causes of blocked drains and how to fix them.

1. Tree roots penetrating a cracked pipe

When there are cracks or structural damage to a pipe, sometimes the root systems of a tree can grow through these. This will cause a blockage within the pipe that impedes or even halts the natural flow.

To fix this issue, you should use a jet rodding machine. These high-pressured hoses blast through your blocked plumbing lines to clear the tree root obstruction.

2. Matted hair in the shower drain

It’s normal to shed a little (or a lot) of hair in the shower. However, this can quickly become an issue for the drain in your shower or bath for large households or homeowners with long or curly hair. When hair mats in the drain, it can slow and cut off water flow completely.

To fix this, you should pull out what hair you can and dissolve the rest with a solution made up of ½ cup of baking soda, ¼ cup of table salt and 1 cup of heated vinegar.

3. Food scraps in the kitchen sink

When washing your dishes in the sink, you should always put food scraps into the bin, compost, or use another sustainable and renewable method of waste disposal. If these food scraps are just washed away into the kitchen sink, they can clog up the U-bend and swell.

To fix this, pour the drain unblocker down the sink. Occasionally, you may need to go to the external drain outside where it empties and clear the food out of there too.

4. The build-up of oils and fats

‘Fatbergs’ are formed by the solidification of oils and fats. These enter the pipes as liquids and solidify into masses in the winter and colder temperatures. In the national network, these can cost thousands of dollars to remove.

To prevent these in your home, soak oils and fats with a kitchen roll and deposit them in a bin – not down the sink.

5. Wet wipes and un-flushable

Many wet wipes are being falsely marketed as flushable. Often, this is not the case. We recommend that, regardless of the packaging, you never flush a wet wipe down the toilet because they cannot break down the same way that toilet paper does and often cause blockages. The same goes for sanitary products, cotton buds, and other toiletries.

6. Leaves collecting in the outside drain

During autumn, leaves can collect in the dips where your drains empty into the ground outside. To fix a blockage here, remove the leaves and consider putting a wire cover over the drain to prevent this from continuing in future.

7. A build-up of coffee grounds

These, like fat, solidify and harden when washed down the drain. This will narrow the pipe and cause it to block completely. Remove with a drain unblocker and empty coffee grounds into compost or a household bin.

8. Poor installation

Sometimes, when installers cut corners, you may be left with too small or too narrow pipes. These will be prone to blocking and could cost you more money in the long run. Unfortunately, the only way to fix this issue is to have a professional plumber come in and reinstall your pipes.

9. Children’s toys and other inanimate objects

Anyone with small children in their lives is probably familiar with the panicked rush of pulling a truck or a doll out of the toilet before it disappears into the U-bend. These are one of the leading causes of damage to or blocking drains.

To fix these, you might need to take apart the system and remove the object yourself or call in a plumber. Always keep a child lock on the door and make sure drains and plugholes are inaccessible to small children.

10. Damage to sewer and external pipes

This includes construction work, extreme weather, and wear and tear. Usually, these issues will be rectified by your local council, but otherwise, you should consult them and their in-house plumber to ensure that your area has unblocked drains.

If the damage is local to your property, you should contact a reputable plumber to resolve the problem.

Get in touch with Same Day Trades today for all your plumbing needs and drain enquiries. Our local plumbing experts service all of Adelaide, Brisbane and Melbourne.

Contact Us

Recent Posts

What Our Customers Say?

Jordan and Christian were very friendly, helpful and easy to talk to. The advice they gave regarding the job was very concise.
Dom and Brad did a fantastic job installing my kitchen rangehood, bathroom exhaust fans, and IXL lights. They were professional, efficient, and their work was completed to a high standard.
They also kept everything tidy and cleaned up properly afterwards, which I really appreciated. Highly recommend!
If we could give Jesse more than 5 stars we would! He came out to an emergency situation where Western Power switched off the electricty to 11 units without warning, and worked tirelessly in 36 degree heat on his own to resolve the issue as quickly as he could. Keeping us updated and in the loop at all times. Would absolutely recommend his services to anyone, he is a valuable asset to your company. Polite and friendly, even when dealing with the frustrated residents, with an excellent work ethic.
Great service by Daniel. Stopped my leaking kitchen tap, thank you I would love too use you again. Shelley
Andy was very efficient. He discussed the issues & how to solve them & once I gave the go ahead he installed new taps with 1 year warranties & didn't leave any mess. Very professional & I definitely would recommend this company
Thank you jacob for the great service
First time using this service.
Prompt, efficient, friendly and professional.
The boys were extremely professional, friendly and there work was high quality. Recommend without hesitation

Get Quote Now