Plumbing · Plumbing
Clear a Blocked Sink Drain
Repair summary
Slow-draining sinks are usually a hair and grease clog in the P-trap. Start with a plunger, then try a drain snake. Avoid caustic drain cleaners — they damage older pipework.
Likely issue
Hair, soap and grease blockage in the trap
DIY difficulty
2/5
Estimated DIY cost
$0–$30
Estimated tradie cost
$180–$350
Tools required
- Plunger
- Drain snake
- Bucket
- Rubber gloves
Materials required
Step-by-step instructions
- Place a bucket under the trap and unscrew the slip nuts to clean it out.
- Slow-draining sinks are usually a hair and grease clog in the P-trap. Start with a plunger, then try a drain snake. Avoid caustic drain cleaners — they damage older pipework.
Safety warnings
If the blockage is past the trap or affects multiple fixtures, call a licensed plumber — it may be a main line issue.
When to call a tradie
Call a licensed tradie if the work is outside the scope of this guide, involves regulated trades (electrical, gas, structural, waterproofing), or if you discover hidden damage. A professional will typically charge $180–$350.
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