Unblock Sink Drain Sydney

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Food Debris

Leftover food particles can accumulate and clog the sink drain over time. It’s essential to avoid rinsing large food scraps down the drain, as they can easily get stuck in the pipes. Using a drain strainer or catcher can help trap food particles before they reach the drain.

Grease and Fat

Pouring cooking oil or grease down the sink can solidify and create blockages. As grease cools, it congeals and adheres to the walls of the pipes, narrowing the passageway for water to flow through. To prevent this, dispose of grease and oil in a separate container and throw it away with the regular trash.


Shedding hair often finds its way into the sink drain and can accumulate, causing blockages. Installing a drain cover with small holes can help catch hair before it enters the pipes. Regularly cleaning the drain cover can prevent hair buildup and reduce the risk of blockages.

Soap Scum

Residue from soap and cleaning products can build up and obstruct the sink drain. This buildup is often a combination of soap, minerals from hard water, and dirt. Using enzyme-based drain cleaners or vinegar and baking soda can help dissolve soap scum and keep the drain clear.

Foreign Objects

Items like jewellery, small toys, or toiletries accidentally dropped into the sink can cause blockages. It’s essential to be mindful of what goes down the drain and avoid letting small objects slip through. If an object does fall into the sink, use a flashlight and a pair of tweezers to retrieve it before it causes a blockage.

Mineral Deposits

Hard water can lead to mineral deposits that gradually block the sink drain. Minerals like calcium and magnesium can accumulate on the walls of the pipes, reducing water flow. Using a water softener or installing a filtration system can help prevent mineral buildup and keep the drain clear.

Tree Root Intrusion

In rare cases, tree roots can infiltrate underground pipes and block the sink drain. Tree roots are attracted to sources of water and can penetrate small cracks or joints in the pipes. Professional inspection and maintenance of underground pipes can help detect and prevent root intrusion before it causes a blockage.

Poor Plumbing Installation

Incorrectly installed or misaligned pipes can contribute to sink drain blockages. Pipes that are not properly aligned or have sharp bends can impede water flow and allow debris to accumulate. Hiring a licensed plumber for installation or repair can ensure that pipes are correctly positioned and connected.

Pipe Damage

Cracked or damaged pipes can restrict the flow of water, leading to sink drain blockages. Damage can occur due to age, corrosion, or physical trauma. Regular inspection of pipes and prompt repairs can prevent minor issues from escalating into major blockages.

Insufficient Pipe Slope

If the pipes are not properly sloped, water and debris may accumulate, causing blockages. Proper slope allows water to flow freely towards the main sewer line. Adjusting the slope of the pipes or installing additional drainage fittings can improve water flow and prevent blockages.


Slow Drainage

Water takes longer than usual to drain from the sink. This can indicate a partial blockage in the drain pipes, allowing water to pass but at a reduced rate. Slow drainage is often an early warning sign of a developing clog and should be addressed promptly to prevent complete blockage.

Standing Water

Water pools in the sink and doesn’t drain at all. When a sink becomes completely blocked, water accumulates and forms a pool, preventing normal usage of the sink. Standing water not only indicates a blockage but also poses hygiene and inconvenience issues.

Gurgling Sounds

You may hear gurgling noises when water is draining from the sink. These sounds occur when air is trapped in the pipes due to blockages, creating pressure imbalances as water flows through. Gurgling sounds can indicate the presence of obstructions and should be investigated to prevent further damage to the plumbing system.

Foul Odours

Unpleasant smells emanate from the sink due to stagnant water and debris. When food particles, grease, and other organic matter accumulate in the drain, they decompose and produce foul odours. These odours not only signal a blockage but can also indicate the presence of bacteria and other pathogens.


Water or sewage backs up into the sink or nearby drains. Backflow occurs when blockages prevent water from flowing freely down the drain, causing it to reverse direction and come back up through the sink. Backflow poses health risks and requires immediate attention to prevent contamination of the living space.


Air bubbles rise from the sink drain when water is flowing. Bubbles indicate that air is trapped in the pipes, usually due to blockages preventing smooth water flow. While bubbles may seem harmless, they signal underlying issues that can lead to more severe blockages if left unaddressed.


The sink may overflow when you run the faucet or use other plumbing fixtures. Overflowing occurs when a blockage prevents water from draining properly, causing it to accumulate and spill over the edges of the sink. Overflowing sinks can cause water damage to surrounding surfaces and should be addressed immediately.

Multiple Affected Drains

If other sinks or drains in the house are also experiencing issues, it could indicate a main line blockage. Main line blockages affect multiple fixtures connected to the same sewer line and require professional attention to clear. Identifying multiple affected drains helps pinpoint the location and severity of the blockage.

Water Backups in Other Fixtures

Flushing the toilet or using other water fixtures causes water to back up into the sink. Water backups in other fixtures indicate a blockage in the main sewer line, affecting the entire plumbing system. Prompt action is necessary to prevent extensive water damage and restore normal drainage.

Recurring Clogs

If you frequently experience blockages despite attempts to clear them, it suggests an underlying issue with the sink drain. Recurring clogs can be caused by persistent blockages, inadequate pipe maintenance, or structural problems in the plumbing system. Identifying and addressing the root cause is essential to prevent ongoing drainage issues.






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A blocked sink drain can be caused by various things, such as food scraps, grease, fats, hair, soap scum, foreign objects, outdoor debris, or tree roots.

You can prevent a blocked sink drain by disposing of food waste properly, avoiding pouring grease or oil down the drain, using a drain strainer or guard, cleaning your sink regularly with hot water and vinegar or baking soda, and trimming any nearby tree roots.

Some signs of a blocked sink drain are slow drainage, standing water, gurgling noises, foul odours, or water backing up into other fixtures.

To unclog your sink drain with baking soda and vinegar, you need to pour half a cup of baking soda down the drain, followed by half a cup of white vinegar. Let the mixture sit for at least 15 minutes, then flush it with hot water.

To unclog your sink drain with a plunger, you need to fill the sink with enough water to cover the plunger head. Place the plunger over the drain hole and pump it up and down vigorously several times. Then lift the plunger and check if the water drains. Repeat until the clog is cleared.

To unclog your sink drain with a plumber’s snake or auger, you need to insert the cable end of the tool into the drain opening and push it until you feel resistance. Then turn the handle clockwise to rotate the cable and break up the clog. Pull out the cable and remove any debris attached to it. Run some water to check if the drain is clear.

You can contact a professional plumber to fix your blocked sink drain by calling 1300311511. They will provide you with fast and reliable service at an affordable price.

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