How to Clean a Toilet Siphon Jet

Toilet bowls are designed with an air pocket in the bend to facilitate a vacuum for flushing. Pushing a toilet tank handle releases the water held in the tank via a valve into the toilet bowl, clearing the waste and filling the toilet with fresh water. This process is designed to beat gravity at its own game and push the water down out of the bowl using that vacuum and down into the drain where it enters the sewer system.

clean a toilet siphon jet

While toilets in the past were inefficient and often wasted a lot of water, introducing the siphon jet to toilet manufacturing changed everything. This molded pocket that sits in the front of the toilet holds some extra water until the toilet is flushed, and the siphon directs it into the trapway.

How to clean a toilet siphon jet is relatively straightforward as long as you know what it is.

While the basic functions of the toilet remain the same with the vacuum action pulling stored water out of the pocket and flushing the bowl, the siphon toilet jet has the water stored there pulled out of it with the initiation of the vacuum, increasing the pressure of the flush.

While this is a popular feature and has brought better efficiency and cost savings to consumers over time, it is not found on all toilets, especially those over a few decades old.

While this efficient and powerful feature is great for your water bills, it does add a layer of complication when you need to clean your toilet. To keep a siphon jet functioning well, it is important to clean it regularly along with the rest of your toilet.

Read on to learn how to clean a toilet siphon jet properly.

Siphon Jet Clogging

Siphon jets get clogged from regular use. Calcium and mineral build-up are the most common reasons, as they are constantly building up along the main hole where the water passes with every flush. Small particles from what is called “hard water” sit on the surface around the siphon jet, slowing the pressure of the jet and decreasing its efficiency.

If you are cleaning your toilet, the first thing to do is check the siphon jet’s condition before cleaning it, as this will help you determine how you need to clean it. Next, you can use a small mirror to check the flush holes around the rim of the toilet that sits just below the toilet rim.

If you see dark spots in an orange or black color (caused by bacteria), white, or some rust-colored stains (caused by deposits), then it is definitely time to clean your siphon jet.

How Do I Know If It Is Clogged?

Some of the telltale signs of a clogged siphon jet do not require a mirror, and you can check if it is clogged by monitoring the basic functioning of your toilet. For example, if there is a low water level in the toilet bowl, this might signify that the siphon jet is not functioning normally.

The role of the siphon jet is to push the water through forcefully and allow for more water to fill the bowl after the flush. If this is not working, there will likely be less water in the bowl after the flush, even if the tank is full.

Typically, if there is a vertical water flow from the jet holes, the water jet siphon needs cleaning. Water should be flowing in a diagonal flow in a circular direction to cycle the water and make the flush cycle more effective at cleaning and clearing the water. If you see anything of the water coming from the siphon jet not flowing in that direction, it is definitely time to clean the siphon jet.

Additionally, if it takes a lot longer than usual to flush the toilet, particularly for the water in the tank to empty into the bowl, it is time to clean the siphon jet. The flush should be functioning normally and swiftly, so any change in pressure or the flush should be checked.

How to Clean a Toilet Siphon Jet

To clean your siphon jet, you must first gather the appropriate tools and materials. You will require:


Turn off the water supply.


Flush the toilet until it has reduced the water volume and the calcifications or deposits are exposed.


Put on your gloves. You do not want to handle potentially harmful chemicals with your bare hands.


Grab your nail-free stainless-steel toilet brush and scrub the jet hole with baking soda.


Turn the water supply back on and flush the toilet to rinse away any residue. If the siphon jet looks clean, then you are good to go!

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A Handy and Important Feature

A siphon jet can be a great feature for a toilet and allows it to function at its best. The water pressure, flush speed, and refill time will be better if the siphon jet is functioning well and quickly. This requires keeping it clean all the time and including siphon jet cleaning as part of your regular routine when cleaning your toilet. Doing this will prevent a lot of headaches down the road.

Frequently Asked Questions (FAQ)

Still, have questions on how to clean a toilet siphon jet and other toilet care tips? Read on for more valuable information.

What kind of toilet reduces the frequency of clogging?

To truly avoid needing to clean your siphon jet regularly, it is best to buy the right kind of toilet. The Total Ultramax is one of the best on the market and features a single-piece design to avoid leakages under the rim of the toilet.

How often should I clean my toilet?

Keeping your toilet clean in every part will help you avoid the siphon jet building deposits and calcifications. However, the best way to prevent long-term damage from those harmful build-ups is to clean your toilet regularly and make sure that you are thorough.

You may need to use harsher cleaning solutions that include distilled white vinegar and a pumice stone. This will give you the chance to scrub off any stubborn residue after your initial cleaning and ensure that there is not a starting place for the bacteria to start building again.

Do all toilets include siphon jets?

No. You should check that your toilet model includes this feature before using any of the cleaning methods mentioned.

Will vinegar clean toilet jets?

Yes. If you are looking for a more natural way to clean your toilet jets, you can avoid the harsh chemicals and instead reach for some white vinegar. Rim jets can be cleaned effectively with white vinegar and there is no need for rubber gloves or a lot of scrubbing.

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