how to unblock a sink blocked with fat

how to unblock a kitchen sink blocked with fat
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We’ve all been there: the dreaded clogged sink, sluggish and unwilling to drain. It’s a frustrating sight, especially when the culprit is fat and grease buildup. Fat, oil, and grease can be quite the sneaky foes, silently accumulating in your pipes until one day, your sink comes to a complete standstill! But fear not! In this article, we’ll dive into the depths of kitchen sink blockages and show you how to unblock a sink blocked with fat. Say goodbye to standing water and unpleasant odors by following these human-like and creative tips!

Understanding the Culprit: Fat, Oil, and Grease

Before we jump into the remedies, let’s take a moment to understand the villain behind this kitchen sink drama – fat, oil, and grease, also known as FOG. These substances are the usual suspects that lead to stubborn sink blockages, especially in the kitchen where cooking oils and greasy leftovers are disposed of.

When warm fats, oils, and grease are poured down the sink or washed off dirty dishes, they may seem harmless, but as they cool down, they solidify and adhere to the inner walls of the pipes. Over time, this buildup thickens, causing a narrowing of the pipe’s diameter and restricting the flow of water. Eventually, your once smoothly flowing sink transforms into a swamp of standing water!

The Savvy Sink Unblockers: Simple and Effective Methods

Let’s get right to it and explore some ingenious ways to tackle that grease-infested blockage. These methods use common household items, are environmentally friendly, and won’t break the bank. So roll up your sleeves and let’s get started!

1. Boiling Water Blitz

One of the easiest and quickest methods to try first is the boiling water blitz! This method is ideal for minor blockages caused by recently poured fats and grease. Here’s what you’ll need to do:

  • Boil a kettle or a pot of water.
  • Carefully pour the boiling water down the sink in two to three stages. Allow each pour to work its magic for a few seconds before adding more.
  • The hot water will help melt the solidified fat and grease, allowing it to flow down the pipes and clearing any minor blockages in its path.

2. Baking Soda Bombshell

Baking soda, also known as bicarbonate of soda, is a superhero of the cleaning world! When combined with vinegar, it creates a fizzy reaction that can help break down and dislodge the fat and grease buildup.

  • Start by pouring half a cup of dry baking soda down the sink.
  • Follow it up with one cup of white vinegar. The mixture will produce a satisfying fizz, just like a mini science experiment!
  • Let the baking soda and vinegar concoction sit in the sink for about 15 to 20 minutes.
  • After the waiting period, pour some hot water down the sink to flush away the loosened fat and grease.

3. Boiling Soda & Salt Attack

This potent combination of baking soda and salt can be an effective method for more stubborn blockages. The abrasiveness of the salt helps to scrub away the fat and grease, while the baking soda assists in breaking it down.

  • Mix equal parts of baking soda and table salt (about half a cup each).
  • Carefully pour the mixture down the sink.
  • Let it sit for around 15 to 30 minutes.
  • Follow up with boiling water to flush away the loosened fat and grease.

4. Plunger Power

The trusty plunger isn’t just for toilets; it can work wonders on a blocked sink too! The pressure created by plunging can dislodge the fat and grease, allowing water to flow freely once again.

  • Ensure there’s enough water in the sink to cover the rubber part of the plunger.
  • Place the plunger over the drain and pump it up and down rapidly.
  • After a few plunges, remove the plunger and check if the water is draining properly.
  • Repeat the process if necessary until the sink is unblocked.

5. Coca-Cola Cleanup

Believe it or not, Coca-Cola isn’t just a refreshing drink; it can also be used as a cleaning agent! The phosphoric acid in Coke can help break down the fat and grease, making it easier to flush away.

  • Pour a can of Coca-Cola down the blocked sink.
  • Let it sit for an hour or more to work its magic.
  • Follow up with hot water to clear away the loosened residue.

FAQs: Clearing Your Doubts!

  1. Can I use chemical drain cleaners to unblock my sink? It’s best to avoid chemical drain cleaners as they can be harsh on your pipes and harmful to the environment. Stick to the eco-friendly methods mentioned above for a safe and effective solution.
  2. My sink is still blocked after trying all these methods. What should I do? If the blockage persists, it might be time to call in a professional plumber. They have the tools and expertise to tackle more stubborn blockages safely.
  3. How can I prevent fat and grease buildup in the future? To prevent future blockages, avoid pouring fats, oils, and grease down the sink. Instead, allow them to cool and dispose of them in the trash. Using sink strainers can also help trap food particles and prevent them from going down the drain.
  4. Can I use hot water from the tap for the boiling water method? Using hot tap water may not be as effective as boiling water since it might not be hot enough to melt the solidified fat and grease. Boiling water is the best option for this method.


There you have it, a comprehensive guide on how to unblock a sink blocked with fat! With these simple and inventive methods, you can bid farewell to those stubborn kitchen sink blockages. Remember, it’s essential to act promptly when you notice slow drainage or standing water in your sink to prevent the issue from escalating.

Instead of resorting to harmful chemical cleaners, embrace these eco-friendly alternatives that won’t harm your pipes or the environment. Whether you choose the boiling water blitz, the baking soda bombshell, the boiling soda & salt attack, or the plunger power, you now have the knowledge to tackle fat, oil, and grease buildup with confidence!

Is your sink clogged with a treacherous and potentially hazardous blockage in London? Don’t wait for disaster to strike! Call our professional blocked sink service now to avoid catastrophic plumbing emergencies and ensure the safety of your home!

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Dany is a seasoned plumbing expert with 5+ years of experience. As a licensed plumber and certified professional, Dany has handled a wide range of projects, from minor repairs to large-scale installations. With a passion for eco-friendly solutions, Dany is dedicated to providing efficient and sustainable plumbing services.

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