The Top Causes of Blocked Drains and Their Simple Solutions

Name: Blocked Drain Sydney
Brand: Local Sydney Blocked Drains
Rating: 5 (3 reviews)

Posted by Local Sydney Blocked Drains on 30 Nov 2025

Blocked drains can be a frustrating problem and cause many inconveniences. They can lead to unpleasant odors, slow draining water, and even sewage backups. You can prevent blocked drains by understanding the causes.

Blocked drains are caused by different reasons, and if not adequately addressed, can lead to costly repairs for your home or business. Here are five common causes of blocked drains and how to prevent them:

1. Foreign objects

Blocked drains can be caused by foreign objects like hair, food particles, soap residue and paper products. These substances stick to pipes and block water flow.

To prevent these blockages from occurring:

Cooking oil should be disposed of in the trash, not the sink
Do not pour coffee grounds or leftover food into the sink
Install drain covers in sinks, bathtubs, and shower stalls to prevent hair from accumulating
Toilet paper should be used sparingly when flushing

2. Tree roots

Tree roots can often be found growing toward cracked pipes and pipe joints, where they can infiltrate the pipe and eventually block it completely.

To prevent tree root intrusion:

Professionals can install pipes properly so that they are level.
Avoid planting trees next to sewer lines

3. Grease buildup

Blockages can be caused by grease buildup. Hot grease is often poured down the kitchen sink. It’s liquid form allows it to escape from dishes, but it congeals quickly once it cools and gets deep within your pipes, causing blockages.

You can dispose of grease-laden oils and other greasy substances in your kitchen sink by emptying the trash into a garbage bin, rather than pouring it into your kitchen drainage system.

4. Structural damage

Cracked or collapsed pipes due to age, weather or changes in the soil can cause blocked drains. The following are signs of pipe damage:

Slowly draining water
Multiple blocked fixtures
Mold growth
Foundation cracks

To prevent structural damages:

Get your sewer lines inspected regularly with the help of CCTV inspections so that professional repair company could detect any issues and fix it immediately.

5. Incorrect pipe installation

Bad pipe design or incorrect installation can cause blocked drains. It is possible for large debris to build up in unreliable areas, causing blockages.

Hire professionals to install pipes correctly and make sure they meet all standards.

Conclusion

If left unattended, blocked drains can cause serious problems. Be proactive about preventing blockages by taking preventative measures, hiring professionals for regular maintenance checks, following plumbing code requirements during constructions, placing catch baskets on screen traps in sink an drain shower outlets to capture any debris before it reaches the drainage system. To ensure your pipes are clear for years to come, take care of them today.

Key takeaways

Here are some essential things you should remember after reading this article:

Blocked drains are often caused by foreign objects such as hair, soap residues, paper products, and food particles.
Tree roots can grow towards water sources like cracked pipes, causing complete obstruction within the pipe.
Grease buildup deep inside your pipes causes stubborn clogs leading ultimately leads to Blocked Drains.
Cracked or collapsed pipes caused by weather, age or ground shifts can cause structural damage that impair smooth water flow.
Incorrect Pipe installations may leave very tight bends susceptible for large debris causing accumulative blockages. from wastes going through drainage system.
Instead of waiting for an emergency, hire only certified plumbers for routine check-ups.
Follow standard local plumbing codes during construction.
Place catch baskets on screen traps at outlets to capture any debris before it reaches the drainage system.