If you're dealing with a clogged kitchen sink, there's a good chance that grease is the culprit. Grease might seem like a liquid when it's hot, but it cools and solidifies in your pipes, leading to blockages. Here's a comprehensive guide on how to tackle this common plumbing issue, along with some preventative measures to keep your kitchen sink running smoothly.
Understanding Grease Clogs
Grease clogs often occur in the trap, the curved section of pipe beneath your sink. This is where water collects and prevents sewer gases from entering your home. When grease cools and solidifies in the trap, it can trap food particles and other debris, leading to a complete blockage. Here's how to identify a grease clog:
- Slow draining water
- Gurgling sounds from the drain
- Foul odors coming from the drain
- Water backing up into the sink or other drains
How to Clear a Grease Clog
Boiling Water
Boiling water can help dissolve some of the grease. Pour a pot of boiling water slowly down the drain, then follow up with a kettle of cold water. The temperature difference can help break up the grease.

Baking Soda and Vinegar
This classic combination can help break down grease and other buildup. Pour 1/2 cup of baking soda into the drain, followed by 1/2 cup of white vinegar. The mixture will fizz, so be careful. Let it sit for 30 minutes, then pour boiling water down the drain.
Dish soap
Dish soap can help break down grease. Pour 1/2 cup of dish soap down the drain, followed by hot water. The soap will help dissolve the grease, while the hot water will help flush it away.
Plunger
If the above methods don't work, you might need to use a plunger. First, fill the sink with enough water to cover the bell of the plunger. Place the plunger over the drain and pump it up and down vigorously. This should create enough pressure to dislodge the clog.

Snake or Auger
If the clog is further down the pipe, you might need to use a snake or auger. These tools can reach deep into the pipes to break up and remove clogs. If you're not comfortable using one, it's best to call a professional.
Preventing Grease Clogs
Prevention is always the best cure. Here are some tips to prevent grease clogs in your kitchen sink:
- Never pour grease down the drain. Instead, pour it into a heat-resistant container, let it cool, then throw it in the trash.
- Wipe greasy pots, pans, and dishes with a paper towel before washing them.
- Install a drain strainer to catch food particles and other debris.
- Regularly clean your drain with a mixture of baking soda and vinegar to prevent buildup.
If you find that your sink is clogging frequently, it might be a sign of a bigger problem. In this case, it's best to call a professional plumber. They have the tools and expertise to diagnose and fix the issue.