Blocked Drain in Perth? What to Do and Who to Call

A blocked drain is one of the most common plumbing problems Perth homeowners face. From slow-draining sinks to completely blocked sewers, knowing what causes blockages and when to call a professional can save you time, money, and a serious mess.

Signs You Have a Blocked Drain

The early signs are usually slow drainage from a sink, basin, or shower — water pooling rather than draining freely. As the blockage worsens, you may notice gurgling sounds from drains, unpleasant smells from overflow points, or water backing up in unexpected places (water in the shower when you flush the toilet is a classic sign of a serious main drain blockage).

Common Causes of Blocked Drains in Perth

Tree roots are the number one cause of serious drain blockages in Perth. The dry WA climate drives tree roots toward water sources, and older clay or concrete pipes are particularly vulnerable. Once roots infiltrate a pipe, they grow rapidly and can cause complete blockage or collapse.

Grease and fat build up in kitchen drain lines over time. Cooking fat solidifies as it cools, narrowing pipes gradually until flow is restricted.

Foreign objects — wet wipes, cotton buds, sanitary products — are frequent culprits in bathroom drains. These items don't break down in water and accumulate quickly.

Hair and soap scum combine to form stubborn blockages in shower and basin drains.

DIY vs. Calling a Plumber

For minor blockages in a single fixture, a plunger or drain snake is worth trying first. Chemical drain cleaners can dissolve hair and grease but are harsh on older pipes and won't touch tree root intrusions.

Call a licensed plumber if: multiple drains are blocked simultaneously, you can smell sewage, water is backing up from unexpected places, or your DIY efforts haven't cleared the problem after two attempts. These are signs of a main drain blockage that requires professional equipment — jet rodding or CCTV inspection — to properly diagnose and fix.

What a Plumber Will Do

A Perth plumber will typically start with a visual assessment and may recommend a CCTV drain inspection to pinpoint the location and cause of the blockage. Jet rodding (high-pressure water jetting) is the most effective clearing method for most blockages. Tree root intrusions may require cutting followed by jetting, and in severe cases, pipe relining or excavation.