How to Unclog a Grease Clogged Drain

If your kitchen sink drain is clogged, then most probably due to the deposition of leftover food wastes and grits inside the drain.

There are different food substances that are more responsible for causing a clogged drain. Such as fats, oils, grease, and starch.

These food components easily create build-up inside the drain and further cause the drain to clog gradually.

And among them, the most common culprit is grease. And the issue with grease is that you might avoid throwing all other food components, but it’s very hard to avoid grease.

How To || Fixing Clogged Sprinkler ...
How To || Fixing Clogged Sprinkler Heads

And not only hard to avoid, but also hard to identify it to be the main culprit behind a clogged drain.

Therefore, to make it easier for you, in this article, I’ll be discussing how to unclog a grease clogged drain and whether Drano is effective in removing such drain clogs.

How Does Grease Form?

Grease is a very stubborn and regular component. It exists in more or less all types of food except fruits and vegetables.

It includes meat, dairy products, coffee, eggshells, and many other day-to-day essential food components. Again, fruits or vegetables combined with oil also form grease.

But foods aren’t only responsible for grease. One of the biggest contributions in building grease inside the kitchen sink drain is played by dishwashing soaps and detergents.

Since most of the soaps are made of animal fat, the fat is converted into grease when it remains stuck to the drainpipe walls for a reasonably long time.

Grease is such a thing that even if you clean your drain hole every day, it will build up anonymously this way or that way.

And for this reason, grease is generally considered to be the most common culprit in causing a drain clog.

Many times, in the lower portion of the pipe, where the warm water gets cooler before reaching, the fats and oils stuck to the walls become solid reacting with the cold water and air inside the pipe.

And this further causes the grease to float on the water surface of drainage. And then, gradually, these greases cover up the top of the pipe as well.

Over time, more fatty, oily, and greasy substances tend to arrive and accumulate at the bottom of the pipe forming a huge strong blockage caused by grease.

How to Unclog a Grease Clogged Drain?

There are several methods to unclog a grease clogged drain. The method you should be opting for depends on how difficult the grease-built clog is.

Will Drano Unclog Grease?

As different forms of Drano are made for different purposes, the Drano Kitchen Granules is specially made for quickly melting down grease clog from the kitchen sink drain.

The Drano Kitchen Granules form a great amount of heat when poured through the drain hole, which when reaches the grease blockage at the bottom of the pipe, melts them down immediately.

But not to mention, using Drano is quite risky. And especially when it’s as strong as melting down a stubborn grease clog.

It has the potential to damage your skin or eyes if it comes into contact and can also damage your nose and lungs if its fumes are inhaled.

That is why Drano should be kept as the last option to unclog a grease clogged drain.

And so, let’s take a look at some of the easiest and safest hacks and methods that you should try first to unclog your grease clogged drain.

Boiling Water

This is the simplest yet very effective hack to remove a grease clog. All you need to do is boil some water in batches and pour them down the drain one batch after another.

And then, just check if the clog is removed or not and if the water still overflows when you open the faucet or not.

If it doesn’t, then it means your grease clog is successfully removed. But if it does, that means the clog is still there and so keep on continuing the process.

But you should try this only if your drain pipes are made of metal, not plastic. Or else, the boiling water might damage, lighten, or meltdown the pipes of your drain.

Vinegar and Warm Water Solution

If just boiling water doesn’t really seem to work for you to unclog your grease-clogged drain, then try a solution of vinegar and warm water.

For this, you can use any white vinegar available in your kitchen. All you need to do is add vinegar and warm water in a 50:50 ratio in a bowl and then mix them well.

And then, just drop the solution down the drain. After a while of dropping the solution, pour some boiling water to wash the clog away. If your pipe is made of plastic, avoid this step.

This time, the grease clog should be removed. If you still don’t observe a satisfying result, then repeat this process a few times until the results are satisfying.


A plunger is a very useful plumbing tool. Using a plunger to remove the grease clog can be a temporary solution if you have one in your house.

For that, you have to cover the drain hole completely with a plunger and then have to plunge it fiercely a couple of times.

The plunger uses a strong force of air to dissociate and break down the clog into small pieces. But it can’t be a long-term solution.

Because it won’t remove or eliminate the grease from the drain. All it will do is break down the clog. And so, there’s a high chance of the grease to build up once again sooner.

Thus, if plunging seems to break down the grease clog for you, then you can follow it with a batch of boiling water or the vinegar solution to clean away the grease residues.

Carbon Dioxide Drain Gun

If you have tried all three of the above solutions properly but none worked to remove the grease clog in your drain, it indicates the clog is too solid and stubborn.

Therefore, in this case, you can use a very powerful plumbing tool called the carbon dioxide drain gun or any other tool with compressed air.

You can find it in any of the local plumbing stores in your area if you don’t have one already in your house.

As the grease clog inside your drain is very stubborn, it requires force to break it down. This very tool uses compressed air to push down and break even the hardest clogs down a drain.

Hydro Sewer Jet

This should be the last thing you can try in an attempt to unclog your stubborn grease clogged drain if all the other methods included above don’t seem to work.

But it is definitely not recommended for you to use a hydro sewer jet if you haven’t used it before and are not skilled in using it.

Final Words

I hope I was able to help you solve your nightmare of a grease-clogged drain. And if still your problem isn’t solved, then consulting a professional plumber is the only option left for you.

But before that, you need to make sure that you try all the above methods carefully and properly with perseverance to get the expected result.

Thanks for reading till the end!