Emilie Meyer
S-trap toilet pans are a traditional option typically installed in older buildings and large facilities such as schools. They are often chosen to maintain the classic aesthetic of the restroom or to keep with the original theme of the building. S-trap toilets are also easier to clean compared to other types. When installing an S-trap toilet pan, the first step is to turn off the mains water supply and disconnect the old toilet, paying attention to the area where the toilet pan connects to the waste outlet on the floor. Next, the waste outlet needs to be cleaned and secured, and a pan connection installed. Once the new pan is fixed in place, a watertight seal between the cistern and the pan needs to be created, often using a rubber bung or seal. Finally, the water supply can be turned back on, and the toilet can be checked for any leaks.
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What You'll Learn
Turn off the water supply and remove the old toilet
Before installing an S-trap toilet pan, you must first remove the old toilet. Start by turning off the mains water supply. This is an essential step, as it ensures you won't have any water leaks or spills during the removal process. Once the water supply is turned off, you can begin disconnecting the old toilet.
As you disconnect the toilet, pay careful attention to the area where the toilet pan meets the waste outlet on the floor. The debris may be held in place by cement mortar, so you'll need to remove it gently. It's important to keep the waste exit area as undisturbed as possible to make installing the new toilet pan easier.
After you've finished cleaning and securing the waste outlet, you can move on to installing the new toilet pan. This process involves positioning the new toilet pan and connecting it to the waste outlet. Make sure the pan is securely in place before proceeding to the next step.
Now, you can connect the cistern to the pan, ensuring a watertight seal is created. This is typically done by inserting a rubber bung or seal into the connection between the cistern and the pan. Once the connection is secure and the seal is in place, you can turn the mains water supply back on and test the new toilet. Check for any leaks or water escape to ensure the toilet is functioning properly.
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Clean and secure the waste outlet
When removing the old toilet, be cautious around the area where the toilet pan joins the waste outlet on the floor. The debris may be held in place with cement mortar, which will need to be gently removed.
Once the old toilet has been removed, clean the waste outlet thoroughly. The waste outlet is the 'S'-shaped porcelain pipe that rises from the floor and ends at the mouth of the toilet bowl. It is important to ensure that the waste exit is only slightly disturbed by your work.
After cleaning, secure the waste outlet by installing a pan connector. This will connect the toilet pan to the waste outlet.
It is important to note that the plumbing code prohibits the use of a double trap. This means that installing a second trap on the waste line is unnecessary and prohibited, as the toilet already has a built-in trap.
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Position the new toilet pan
Positioning your new toilet pan correctly is crucial for the proper functioning of your S-trap toilet. Here is a step-by-step guide to help you position the new toilet pan accurately:
Firstly, ensure that the waste outlet on the floor is only slightly disturbed during the removal of the old toilet. The debris around the waste exit may be held by cement mortar, so it is important to carefully remove it to avoid damage. Once the waste outlet is clean and secure, you can proceed to install a pan connection.
Now, carefully position your new toilet pan over the waste outlet. S-trap toilet pans are typically used when the waste outlet is located on the floor directly behind the pan. The 'S' shape of the waste outlet rises from the floor and bends towards the mouth of the toilet bowl. This design allows for flexibility in positioning the toilet, making it a common choice for older buildings with less adaptable plumbing systems.
When positioning the toilet pan, ensure that the trap is formed by a bend in the pipe just below the toilet bowl. This trap should have an 'S' shape when viewed from the side, rising from its lowest point beyond the waste entrance to a height of approximately half the bowl's height. This contour is an essential feature of S-trap toilets.
Finally, fix the pan securely in place. You can use access panels on both sides of the pan for easier installation. Once the pan is firmly positioned, you can proceed to the next step of connecting the cistern to the pan, ensuring a watertight seal.
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Connect the cistern to the pan
After the pan has been fixed in position, the next step is to connect the cistern to the pan. Ensure that you pay close attention to creating a watertight seal. This is often done by inserting a rubber bung or seal into the connection, which can be found between the cistern and the pan. Once this has been secured, you can turn the water supply back on and test the toilet for any leaks or escaped water.
The S-trap toilet pan is a traditional option, often used when the waste outlet is located on the floor directly behind the pan. The 'S' refers to the shape of the porcelain waste outlet, which rises from the floor and finishes in the mouth of the toilet bowl. In many instances, designers choose to work upwards from the waste opening in the floor and conceal it behind a duct set or a small false wall. This allows them to use connecting waste pipes to bring the opening up and out of the wall, enabling the use of back-to-wall and wall-hung toilets.
However, many people prefer to maintain the classic look of S-trap toilets, especially in older buildings and large format existing school toilets. One major reason for this preference is that S-trap toilets are more accessible to clean than other types of toilets.
To install an S-trap toilet pan, you must first remove the outdated toilet after turning off and disconnecting the mains water supply. During this process, pay close attention to the area where the toilet pan meets the waste outlet on the floor. You should aim to ensure that the trash exit is only slightly disrupted. In some cases, the debris may be held in place by cement mortar, which will need to be gently removed.
Once you have finished cleaning and securing the waste outlet and installing a pan connection, you will need to position your toilet pan. Adjust the alignment of the toilet pan so that the vertical waste outlet can be connected to the floor through the pan connector.
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Check for leaks
After installing an S-trap toilet pan, it is important to check for leaks to prevent water damage and the escape of sewer gases, such as methane, into the room.
First, ensure that the toilet tank is full. Flush the toilet and check around the black rubber seal, also known as a pan connector, for any leaks. If the rubber seal is perished, it may need replacing. This can be done by removing the toilet pan and the old rubber seal, then installing a new seal and replacing the pan. In some cases, it may be possible to simply adjust the existing connector to stop the leak.
If you are unsure where the leak is coming from, it may be helpful to add food colouring to the toilet tank. If the coloured water leaks out, you have identified the source of the leak.
It is also important to check the cold water pipe where it attaches to the cistern, as leaks can sometimes occur here. This may be fixed by simply wiggling or pushing the rubber pipe, or by shutting off the water supply and unscrewing the pipe.
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