
A blocked sink is one of those household inconveniences that can disrupt your day. Whether it’s water that refuses to drain or an unpleasant smell wafting up from the plughole, it’s a problem that needs fixing—and fast!
The good news is that you don’t always need to call in a plumber. With the right tools, a bit of patience, and some simple techniques, you can often fix it yourself.
Let’s break down how to unblock a sink step by step so you can get things flowing smoothly again.
Understanding the causes of a blocked sink
Before diving into the fix, it helps to know what’s causing the problem. Most sink blockages are caused by a build-up of:
Grease and fat: These solidify in the pipes, especially in kitchen sinks.
Food debris: Small bits of food can accumulate over time.
Soap scum and hair: A common issue for bathroom sinks.
Foreign objects: Accidentally dropped items like bottle caps, jewellery, or cotton buds can clog the system.
Identifying the likely culprit can help you choose the best unblocking method.
Tools and materials you’ll need

Unblocking a sink doesn’t require specialist equipment, but having the right tools on hand can make the job much easier. Here’s a checklist:
A plunger
Rubber gloves (things might get messy!)
A bucket or bowl to catch water
Drain snake or wire coat hanger (for deeper clogs)
Bicarbonate of soda and vinegar (natural solution)
Drain cleaner (chemical option, if necessary)
Adjustable wrench (to take apart the pipes if needed)
You can find most of these items at Youngs, and we're always happy to help you pick the best options.
Step-by-Step Guide to Unblocking a Sink
Step 1: Boiling Water
Sometimes, the simplest solutions are the most effective. Boil a kettle and carefully pour the hot water down the drain in stages. This can help dissolve grease or soap scum blocking the pipes.
Step 2: Use a Plunger
Place the plunger over the plughole and press down firmly to create a seal.
Pump the plunger up and down several times, then lift it away to see if the water starts draining.
Repeat a few times if necessary.
Step 3: Natural solution (Bicarbonate of Soda and Vinegar)
Pour half a cup of bicarbonate of soda into the drain.
Follow it with half a cup of white vinegar.
Let the mixture fizz and work its magic for 10-15 minutes, then flush it with hot water.
Step 4: Check the U-Bend

If the blockage persists, it might be trapped in the U-bend (the curved pipe under your sink):
Place a bucket underneath to catch any water.
Unscrew the U-bend carefully using an adjustable wrench.
Clear out any debris and rinse the pipe before reattaching it.
Step 5: Use a Drain Snake
For stubborn clogs further down the pipe, a drain snake or a makeshift wire coat hanger can help. Feed it into the drain and twist it to dislodge the blockage.
Step 6: Chemical Drain Cleaner
As a last resort, use a chemical drain cleaner following the instructions on the label. Be cautious, as these products can be harsh on pipes and the environment.
Preventative Measures to Avoid Future Blockages
Once your sink is unblocked, take a few extra steps to prevent the problem from happening again:
Use a sink strainer to catch food scraps, hair, and debris.
Avoid pouring grease, oil, or fat down the drain—let it cool and dispose of it in the bin instead.
Regularly flush your drains with boiling water to dissolve build-up.
Use a natural solution of bicarbonate of soda and vinegar once a month as a preventative measure.
When to Call a Professional
If you’ve tried all the above steps and the sink is still blocked, it might be time to call in a professional. Persistent blockages could indicate a more serious issue, such as a blockage in the main sewer line, which requires expert attention.
At Youngs, we work with trusted tradespeople and can point you in the right direction if you need additional help.
A blocked sink doesn’t have to derail your day. With a bit of know-how and the right tools, you can usually fix the problem yourself. And if you need advice or supplies, pop into your nearest Youngs branch—we’re here to help!
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