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Blocked Drain

Top Reasons Your Sink Keeps Getting Blocked and How to Stop It

Andy

A blocked sink can be incredibly frustrating, whether it’s in your kitchen or bathroom. Slow drainage, bad odours, and even standing water are common signs that your sink is blocked. 

If left untreated, a blocked sink can lead to more severe plumbing issues, including burst pipes and expensive repairs. In this blog, we’ll explore the most common causes of sink blockages and offer simple solutions to prevent them.

Common Causes of Blocked Sinks

Here are the common causes of blocked sinks

Food Scraps and Grease (Kitchen Sinks)

In the kitchen, food scraps and grease are the main culprits behind blocked sinks. Many people make the mistake of rinsing food particles, oils, and fats down the drain. 

Over time, these substances accumulate, creating a sticky residue that blocks the pipes. Grease, in particular, hardens as it cools, forming solid blockages that are difficult to remove.

Soap Scum and Hair (Bathroom Sinks)

Soap scum is another major cause of sink blockages. In bathroom sinks, soap, body oils, and hair can accumulate inside the pipes, narrowing the space for water to flow. 

Hair, in particular, can wrap around soap scum and form stubborn blocks. This combination can result in slow drainage or complete blockages.

Foreign Objects (Both Kitchen and Bathroom)

It’s easy to accidentally drop small items down the drain, such as jewellery, food wrappers, or toothpaste caps. 

While these items may seem harmless, they can become trapped in the pipes and cause blockages. Over time, more debris can gather around these foreign objects, worsening the block.

Hard Water Build-Up

If you live in an area with hard water, minerals like calcium and magnesium can build up inside your pipes. 

Over time, this mineral build-up narrows the space inside the pipes and can cause blockages. Hard water is especially common in kitchen sinks, where water flows frequently and is often heated.

Improper Disposal of Waste

Many people make the mistake of disposing of non-biodegradable items in the sink, such as wet wipes, cotton balls, and even paper towels. 

These items don’t break down like food or natural waste and can easily cause blockages in both kitchen and bathroom sinks. The same issue can arise with too much toilet paper being flushed down the toilet, which can eventually back up into your sink.

How to Prevent Blocked Sinks

Here is how to prevent blocked sinks

Be Careful What You Put Down the Drain

To prevent blockages in the kitchen, always scrape food scraps into the trash before washing dishes. Avoid pouring grease, oils, or fats down the sink. Instead, let them cool and dispose of them in the trash. In the bathroom, use a drain strainer to catch hair and soap residue before it enters the pipes.

Use Hot Water Regularly

Running hot water down your kitchen and bathroom sinks can help dissolve grease and soap scum. In the kitchen, after washing dishes, pour boiling water down the drain to clear any leftover grease or food particles. In the bathroom, hot water can help break down soap scum and body oils that have built up over time.

Install a Drain Strainer

Installing a drain strainer in your kitchen and bathroom sinks is an effective way to catch debris and prevent blockages. These simple mesh devices trap food particles, hair, and other debris, preventing them from entering the pipes. Regularly clean the strainer to maintain smooth water flow.

Regularly Clean Your Drains

To avoid build-up in your drains, clean your sinks regularly. Once a week, pour a mixture of baking soda and vinegar down your sink, followed by hot water. This natural solution helps break down any build-up in the pipes and freshens the drain. You can also use store-bought drain cleaners, but be cautious, as harsh chemicals can damage your pipes over time.

Avoid Flushing Non-Flushable Items

In both the kitchen and bathroom, avoid flushing anything that isn’t biodegradable down the sink. This includes wet wipes, cotton balls, facial tissues, and even hair. By being mindful of what goes down the drain, you can significantly reduce the risk of blockages.

Use a Garbage Disposal Properly

If your kitchen has a garbage disposal, use it correctly to help prevent blockages. Always run cold water while using the disposal to help food particles move down the drain. Avoid putting fibrous or starchy foods, such as potato peels, coffee grounds, or eggshells, down the disposal, as these can cause blocks.

What to Do if Your Sink is Blocked

If you’ve noticed that your sink is already blocked, don’t panic. Here are a few steps you can take before calling a plumber:

  1. Plunge the Sink: If water is draining slowly or has completely stopped, use a plunger to attempt to dislodge the block. Ensure there is enough water in the sink to cover the plunger and create a seal. Then, plunge up and down several times to break up the blockage.
  2. Use a Drain Snake: A drain snake is an excellent tool for reaching deeper blockages. Insert the snake into the drain and twist it to grab any debris or hair causing the blockage. Once you’ve pulled out the debris, run hot water through the sink to flush the pipe.
  3. Pour Baking Soda and Vinegar: If the blockage isn’t severe, try a natural solution. Pour half a cup of baking soda down the drain, followed by half a cup of vinegar. Let it sit for 15-20 minutes, then flush the drain with hot water. This combination can break down grease, soap scum, and minor blockages.
  4. Call a Professional Plumber: If you’ve tried these DIY methods and the sink is still blocked, it’s time to call a professional plumber. They have the tools and expertise to diagnose the issue and clear the blockage safely without causing damage to your pipes.

Why Hire a Blocked Drain Plumber in Sydney?

Blocked sinks are a common problem in Sydney homes, and a professional plumber can help you address the issue quickly and efficiently. 

Attempting to clear a severe blockage yourself can lead to further damage or more serious plumbing issues. 

A professional plumber can identify the root cause of the problem, clear the drain, and offer advice on how to prevent future blockages.

Conclusion

Blocked sinks can be a hassle, but with proper care and maintenance, you can prevent most common causes of blockages. 

By being mindful of what goes down your drains, using drain strainers, and regularly cleaning your pipes, you can avoid costly repairs and ensure smooth water flow in both your kitchen and bathroom. 

If you do encounter a blockage, try simple DIY methods like plunging or using baking soda and vinegar before calling a professional plumber

A timely response can save you from more serious plumbing issues down the line.

FAQs

What should I do if my sink is blocked?

Try using a plunger or a drain snake to clear the block. If these methods don’t work, call a professional plumber to resolve the issue.

How can I prevent my kitchen sink from getting blocked?

Scrape food scraps into the trash, avoid pouring grease down the drain, and regularly clean the drain with hot water and natural cleaners.

Can I use chemical drain cleaners to fix a blocked sink?

While chemical drain cleaners are available, they can damage your pipes over time. It’s better to use natural remedies like baking soda and vinegar or call a professional plumber.

How often should I clean my bathroom sink?

Clean your bathroom sink regularly, especially if you have long hair. Using a drain strainer can help catch hair and soap scum before they enter 

What should I do if the blockage is deep in the pipes?

If the blockage is deep and DIY methods aren’t working, it’s time to contact a professional plumber. They have the right tools and expertise to clear deep blockages without causing damage.

Andy Quinn

Founder

Andy Quinn is the founder of Blocked Drain Plumber Sydney, a family-owned plumbing business serving Sydney with over 63 years of combined industry expertise. Andy and his team specialize in delivering reliable solutions for everything from blocked drains to emergency plumbing, ensuring quality service and customer satisfaction.