Fixture-first clearing

A blocked sink is often caused by grease, food scraps, hair or soap in the trap or nearby waste pipe.

Sink drain cable positioned in a basin with backed-up water
  1. 01StopStop using the sink if water is escaping from the cabinet or floor.
  2. 02CheckNote whether nearby sinks, floor wastes or appliances also drain slowly.
  3. 03Send detailsSend the sink location, symptoms and any products already used.

Fast answer

Start at the trap and waste

One slow sink often points to the trap or waste branch. If connected fixtures react or the blockage returns, investigate further along the line before treating it as an isolated sink problem.

Signs the problem extends past the sink

  1. 01Water drains slowly or does not drain
  2. 02The sink gurgles after use
  3. 03Water returns through another connected outlet
  4. 04Odour or leakage appears around the trap or waste

Clearing the sink

Check the trap and connected line

A single slow sink often starts at the trap or waste branch. If connected fixtures react, investigate further along the line before choosing the cleaning method.

Scott Johnstone clearing an outdoor drain line at a Sydney home
Scott Johnstone clearing an outdoor drain line during a Sydney callout.

Where the blockage may be

01
Trap and waste clearing
For accessible local build-up and obstruction.
02
Mechanical cleaning
For a suitable branch line beyond the trap.
03
Jetting or CCTV
For larger or recurring connected-line restrictions where access suits.

What happens

Check the fixture, clear the blockage and test the flow

The trap and waste line are cleared by augering or jetting to suit the build-up, then flow tested so the sink empties freely again.

  1. 01

    Check

    Check the blocked sink, trap and any shared waste line.

  2. 02

    Clear

    Clear the trap or line with augering or jetting.

  3. 03

    Flush

    Flush the loosened grease and debris through.

  4. 04

    Test

    Test the sink and advise on preventing repeat blockages.

Before you book

Blocked Sinks questions

Straight answers about when this service helps, what is involved and what happens next.

View all drain questions
Why does my kitchen sink keep blocking?

Fats, oils and food scraps can cool and build up in a kitchen waste line. Clearing accessible build-up and keeping these materials out of the sink can reduce avoidable recurrence.

My double sink backs up into the other side — why?

Both bowls share one waste line, so a blockage past the trap pushes water up into the other bowl. The shared line needs clearing, not just the trap.

How do I know whether the blockage is in the trap or further along?

A local trap problem may affect only one fixture. If another connected sink, floor waste or appliance reacts, the restriction may be further along the shared waste line.

Can I use chemical drain cleaner in a blocked sink?

Do not mix cleaners or keep adding product when water is not draining. Tell Scott what has already been used before the trap or line is opened.

What clearing method is used for a blocked sink?

It depends on whether the blockage is in the trap, branch waste or a larger connected line. Safe access and the likely build-up are checked before mechanical cleaning or jetting is selected.

Sydney service areas

Blocked drain help across Sydney

Choose your part of Sydney, or call with your suburb and tell Scott what the drain is doing.

All locations

Blocked drain help

Get help with the blockage

Call if the drain is overflowing or backing up, or send your suburb, symptoms and access details.

Call 0472 753 487

Add photos if they help show the drain, overflow or access point.

Request help

Send the drain details

Send your suburb, which drains are backing up and any useful access details. Scott will come back to you with the next step.