How to Remove Limescale from Toilet Below Waterline

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When you spot unsightly limescale forming underneath the waterline of your toilet, it can be an unpleasant surprise. But the good news is that this problem has an easy solution.

All it takes are some common household items and a bit of creativity, as well as our handy guide to help you make your toilet look sparkling clean like new in no time. With a bit of effort and a few creative ideas, you can make your toilet shine like it’s brand new.

What Is Limescale?


Limescale refers to the buildup of calcium deposits and other minerals in your plumbing fixtures. It is the hard, chalky white substance that can appear on your toilet bowl, sink, and other surfaces in your bathroom.

The color of limescale varies depending on the mineral that is present, but it can range from white to brown or even black. This buildup can be unsightly and cause problems with your plumbing, so it is important to remove it as soon as possible.

Reason Why Limescale Present In Some Toilets

old Toilet Cistern valve

Limescale is a result of numerous conditions, including hard water, inadequate flushing, and high temperatures. After the hard water evaporates, it leaves behind calcium and magnesium ions that join together to form a coating known as limescale.

If you’ve noticed a gross accumulation of residue around your sinks and toilets, it is likely due to the minerals present in hard water, which settles on surfaces after some time. This can be an unsightly occurrence that no one wants to deal with!

How to Remove Thick Limescale

Eradicating thick layers of limescale is easy when you have the right tools and techniques.

Materials & Tools Needed

On your next errand to the store, pick up a significant container of white vinegar- that’s all you need for an excellent start! One purchase will give you infinite cleaning capabilities.

But for those thicker built-up layers of limescale, it might be time to invest in special products and tools such as toilet brushes or even a Sonic Scrubber. With that additional step, every nook and cranny should look brand new.


To begin, fill your toilet bowl with one liter of pure white vinegar and let it sit for three to four hours. Be sure you’ve used the washroom beforehand so that this magical solution can do its job!

Then to tackle those tough stains, pour in a generous amount of white vinegar and scrub away with your toilet brush. If you have particularly stubborn grime under the bowl’s rim, try using a Sonic Scrubber be sure to only use it for bathroom cleaning!

Finally, flush the toilet to rinse off all traces of vinegar and dirt – goodbye grime, hello sparkling clean!

How To Remove Limescale From Toilet Below Waterline

Lurking in the depths of your toilet bowl, limescale can be an unsightly and pesky beast to remove. To effectively remove stubborn clogs and restore your plumbing, you will need the right tools combined with a proven process.

Materials & Tools Needed

If you’re looking to avoid chemical substances, there are plenty of natural and earth-friendly solutions available. For instance, lemon juice, salt, or baking soda can all be used to banish sticky limescale buildup.

Each of these naturally occurring elements has the power to remove even the most stubborn stains without endangering your family or pets.


The vinegar approach can easily break down stubborn stains and limescale, but if you are more of a bleach enthusiast when it comes to cleaning your toilet bowl, then mix some bicarbonate of soda into the water beforehand.

Leave this combination in the bowl until most or all of the discoloration disappears, and give it a good scrub with a brush afterward for any extra hard-to-remove areas before flushing.

Frequently Asked Questions

Does Coke get rid of limescale in the toilet?

Yes, Coca-Cola can be a reliable and effective way to remove limescale from your toilet. Coke is a powerful cleaner thanks to its highly acidic composition, making it the ideal choice for removing hard-to-shift buildup in toilets and kettles and even on other surfaces.

Will bicarbonate of soda get rid of limescale in the toilet?

Yes, bicarbonate of soda is a natural and effective way to remove limescale and other stubborn residues in your toilet. Thanks to its alkaline properties, the bicarbonate of soda can break down deposits and eliminate stubborn buildup without using potentially harmful chemical substances.

Can limescale be permanent?

Limescale is a troublesome problem to get rid of and in certain circumstances, can cause permanent harm to your bathroom. After some time, it eats away at the chrome on taps until they must be stripped off completely for limescale removal. Brown crusts may also form beneath the water line in toilets due to this issue.

Does vinegar damaged toilet bowls?

Absolutely not! Vinegar is the optimal method for successfully eliminating limescale, as it’s more reliable than chemical cleaning products and does no harm to your toilet bowl. Furthermore, vinegar can peacefully dissolve bacteria in your septic system too.

Is CLR better than vinegar?

Figuring out the best approach for tackling stains depends on what kind of stain you have. For everyday dirt and grime, vinegar is your go-to cleaner. But if you’re dealing with harder-to-remove scum from soap or rust and hard water spots, CLR should be your first choice!


With the right tools and approach, your toilet can be rid of lingering limescale or other pesky stains. From natural solutions like vinegar to chemical-based products such as bicarbonate of soda, there are a variety of ways you can tackle problem buildups in your plumbing so that it sparkles once again.

But don’t just rush into action. Take time to consider the specific stain at hand before deciding which solution is best for you. With patience and persistence come incredible results try out different methods until one works its magic on those stubborn instances in no time.