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How do I safely unblock a sink, shower or bath drain, prevent another blockage and estimate plumber costs?

To unblock a shower, stop the water, remove accessible hair and debris, test the drain, then try a cup plunger or hand-operated drain snake.

To unblock a shower, stop the water, remove accessible hair and debris, test the drain, then try a cup plunger or hand-operated drain snake. Stop if chemicals or sewage are present, other fixtures back up, or the blockage persists.

Steps to clear the drain

  1. Expose the drain. Wearing rubber gloves, scoop ordinary standing water into a bucket. If drain cleaner has been added or the water may contain sewage, avoid contact and keep children and pets away.

  2. Remove accessible hair. Lift or unscrew the cover only if it is designed for easy removal. Check how to remove a shower drain cover safely if the fixing is unclear. Use tweezers or a plastic hair-removal tool to pull out reachable debris. Do not disturb sealant, fixed fittings or concealed pipework.

  3. Test the flow. Add a small amount of water. If it drains, add more gradually and rinse with hot tap water, not boiling water, which may damage some plastic fittings, seals or acrylic components. Follow the manufacturers’ care instructions.

  4. Plunge the shower drain. Add enough clean water for a cup plunger to seal over the opening. Use several controlled push-pull strokes, then test with a little water. Do not plunge if drain cleaner is present because it may splash.

  5. Try a hand-operated drain snake. Feed it slowly into the drain, rotate it by hand and withdraw any debris. Stop at hard resistance; never force it through a trap or bend. Do not use powered equipment or dismantle plumbing.

  6. Refit and test. Clean and refit the cover, then increase the water flow gradually. Never mix drain cleaners or add another product, as this can cause hazardous reactions. If a chemical has been used, follow its label and tell the plumber what it was. Check which drain cleaners are safe and what must never be mixed before using any product.

When to call a plumber

Stop DIY attempts if:

  • the shower remains blocked or quickly blocks again
  • a tool meets hard resistance
  • several fixtures drain slowly or water rises through another outlet
  • foul or potentially contaminated water appears
  • chemicals are present and the blockage remains.

Avoid contact with suspected sewage and stop using affected fixtures. Leave trap removal, concealed-pipe work, powered drain clearing and repairs to a suitably licensed plumber.

For chemical exposure, follow the product label and call the Poisons Information Centre on 13 11 26. Call Triple Zero (000) in an emergency.

A professional price depends on whether the blockage is local or deeper in the drain, its cause, access, required equipment, CCTV inspection, location, labour, current market conditions and any pipe damage found. A licensed plumber should assess the line and provide a site-specific quote.

If the fixture still will not drain, backs up elsewhere or may contain sewage, contact our licensed blocked drain plumbers.