Quick Answer

Most blocked bathroom drains in Melbourne are caused by hair and soap build-up. Clear them in under an hour with a drain snake ($15-30 at Bunnings) or a baking soda and vinegar flush — no plumber required.

What You’ll Need

  • Hand-crank drain snake ($15-30 at Bunnings or Mitre 10)
  • Rubber gloves ($5-10)
  • Bucket
  • Baking soda and white vinegar (supermarket)
  • Adjustable spanner (for removing P-trap)
  • Old towels or newspaper

Why Bathroom Drains Block in SE Melbourne

SE Melbourne’s older homes (pre-1980s) often have narrow-bore drains that accumulate hair and soap residue faster than modern plumbing. Bathroom sinks, showers, and baths are the most common blockage points. The good news: most blockages are within the first metre of pipe and are DIY-friendly. Professional drain cleaning costs $150-300 — a $15 drain snake pays for itself on the first job.

Step-by-Step Instructions

  1. Remove the drain cover or plug. Unscrew or pry out the stopper. For baths, pop the overflow stopper or remove the tub drain cover.
  2. Pull out visible debris. Use a bent wire hook or gloved fingers to extract any hair sitting near the drain opening. Remove as much as possible before using tools.
  3. Try baking soda and vinegar first. Pour half a cup of baking soda down the drain, followed by half a cup of white vinegar. Cover with a cloth and wait 15-30 minutes. Flush with hot water. Works well on soap and grease build-up.
  4. Use the drain snake for hair blockages. Feed the snake into the drain opening. Turn the crank while pushing gently. When you feel resistance, twist and pull to hook and extract hair. Retract and repeat until clear.
  5. Remove and clean the P-trap if needed. Under the sink, place a bucket under the U-shaped pipe. Unscrew the P-trap slip nuts by hand. Empty debris, rinse the trap, and reinstall. This clears 90% of sink blockages.
  6. Test the drain. Fill the sink or bath and let it drain. If water flows freely, you’re done. If still slow, repeat step 4.
  7. Reinstall and prevent future blockages. Install a drain hair catcher ($5-8 at Bunnings) to stop hair entering the drain in future.

Troubleshooting

Problem Cause Fix
Snake won’t reach the blockage Blockage is deeper than 1.5m Hire a longer professional snake or call a plumber with jet-cleaning equipment
Baking soda method didn’t work Hair blockage (not soap/grease) Use a drain snake — baking soda works on organic residue, not hair mats
Drain clears then blocks again within days Partial blockage not fully cleared Remove the P-trap and clean it thoroughly; repeat snake passes
Multiple drains slow at once Main drain blockage This is beyond DIY — call a licensed plumber (main drain blockage costs $200-500)
Sewage smell from drain P-trap dry or hair decomposing Run water for 30 seconds to refill trap seal; clear any hair blockage

When to Call a Professional

Call a licensed plumber if: multiple drains are slow or backing up (main drain blockage), you smell sewage gas, your snake gets stuck and won’t retract, or the drain won’t clear after three attempts. A plumber’s jet-cleaning service costs $150-300 and clears blockages that DIY tools can’t reach.

Safety warning: Never use chemical drain cleaners (Drano, caustic soda) in older Melbourne homes — they can damage cast iron and clay pipes, and create dangerous fumes if combined with other chemicals.

Top Tips

  1. Install a $5 drain hair catcher immediately — it prevents 90% of bathroom drain blockages.
  2. Flush drains with hot water weekly to dissolve soap build-up before it becomes a blockage.
  3. The P-trap is your first stop — more blockages live there than anywhere else.
  4. Baking soda and vinegar works on soap and grease. For hair, you need a physical tool (snake or fingers).
  5. Wear rubber gloves — drain traps harbour bacteria. Wash hands thoroughly when done.
  6. In SE Melbourne rental properties, blocked drains are generally a landlord responsibility if the blockage is in the main line. Tenant responsibility for hair build-up.

Frequently Asked Questions

How long does it take to unblock a bathroom drain?

Most DIY bathroom drain clears take 20-45 minutes. Removing and cleaning the P-trap adds 10-15 minutes. If you’re using baking soda and vinegar, allow 30 minutes wait time plus flushing.

Can I use boiling water to clear a blocked drain?

Not on PVC pipes — boiling water can soften plastic joints. Use hot (not boiling) water from a kettle. For older copper or cast iron pipes, hot water is fine.

Is drain snake hire worth it vs buying?

A basic hand-crank snake costs $15-25 at Bunnings and lasts years. If you have multiple bathrooms or drains block regularly, buying is better value than hiring ($20-30/day).

Why does my drain smell even after clearing it?

The P-trap seal may be dry (just run water for 30 seconds), or there’s still decomposing hair in the pipe. A full P-trap clean and baking soda flush usually resolves it.

Will my landlord fix a blocked bathroom drain?

In Victoria, landlords must maintain plumbing in working order. Main drain blockages are the landlord’s responsibility. Hair build-up in the drain cover is generally the tenant’s. Contact Consumer Affairs Victoria if there’s a dispute.

Local Resources for Melbourne Homeowners