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Blocked drains are one of the most common plumbing issues Australian homeowners face. In this guide, our licensed plumbers share practical tips to keep your kitchen, bathroom, and outdoor drains flowing freely — and when to call a professional.
Why Do Drains Block?
Most drain blockages don't happen overnight. They build up gradually as grease, hair, soap scum, food scraps, and other debris accumulate inside your pipes. Tree roots can also infiltrate underground drainage lines through tiny cracks, eventually causing major blockages.
Understanding what causes blockages is the first step to preventing them. Here are the most common culprits by location in your home.
Kitchen Drains
The kitchen sink is the most abused drain in most homes. Cooking oils, fats, and grease are the number one cause of kitchen drain blockages. When hot grease goes down the drain it cools and solidifies, coating the inside of your pipes and trapping food particles.
Prevention tips:
- Never pour cooking oil or grease down the sink — let it cool and dispose of it in the bin
- Use a sink strainer to catch food scraps before they enter the drain
- Run hot water for 30 seconds after washing dishes to help flush residual grease
- Scrape plates into the bin before rinsing, even if you have a garbage disposal
Bathroom Drains
Hair is the primary enemy of bathroom drains. Combined with soap residue, it forms dense clogs that restrict water flow. Shower drains and basin plug holes are particularly vulnerable.
Prevention tips:
- Install mesh drain covers on shower and bath drains to catch hair
- Clean drain covers weekly — it takes 10 seconds and prevents major problems
- Avoid flushing anything other than toilet paper and human waste
- Never flush wet wipes, even those labelled "flushable" — they do not break down
Outdoor Drains
Stormwater and sewer drains outside your home are vulnerable to leaf litter, soil, and tree root intrusion. A blocked outdoor drain can cause flooding, bad odours, and even sewage backup into your home.
Prevention tips:
- Keep gutter guards clean and clear of leaf debris
- Regularly sweep around outdoor drain grates
- Be cautious about planting trees near sewer and stormwater lines
- Have your drains professionally inspected with CCTV every 2-3 years
When to Call a Professional
If you notice slow-draining water, gurgling sounds, or unpleasant odours coming from your drains, it's time to call a licensed plumber. These are early warning signs of a developing blockage that will only get worse if left untreated.
Professional drain clearing using high-pressure water jetting is the most effective way to remove stubborn blockages and restore your drains to full capacity. At Precision Plumbing Co, we also offer CCTV drain inspections to identify the exact location and cause of the problem before recommending a solution.
