
Fixing a WC pan to the floor is a simple process that can be done by anyone with the right tools and instructions. The most common method is to use a WC pan floor fixing kit, which includes screws, fittings, and covers for a professional finish. Some people also use silicone to secure the pan to the floor, but it's important to note that this should not be the only method used as it can compromise the waterproofing. It is also recommended to use brass screws, as they do not rust and make it easier to remove the pan if needed. Overall, fixing a WC pan to the floor is a straightforward task that can be completed quickly and easily with the right tools and instructions.
Characteristics and Values Table
| Characteristics | Values |
|---|---|
| Securing Method | Screwing, bolting, using a fixing kit, using mortar, using silicone |
| Materials | Brass screws, plastic brackets, wood, bolts, mortar, clear sanitary grade silicone, soap and water solution |
| Tools | Screwdriver, drill |
| Time Required | Minimum 24 hours |
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What You'll Learn

Use a WC pan floor fixing kit
A WC pan floor fixing kit is a set of fixtures and fittings that can be used to secure a WC pan to the floor. The kit typically includes chromed screw head covers, threaded bolts, nuts, washers, sleeves, and caps to hide screw heads. This kit is designed to prevent movement in the toilet once it is fitted, and it is compatible with most standard pans.
To use a WC pan floor fixing kit, you will need to follow the steps outlined below:
- First, you will need to identify the type of fixing holes in your WC pan. The holes are typically diagonal, but some pans may have horizontal fixing holes.
- If your WC pan has diagonal holes, you can use the brass screws provided in the kit to secure the pan to the floor. Place the plastic sleeves included in the kit over the screws to prevent them from damaging the pan.
- If your WC pan has horizontal fixing holes, you may need to cut a piece of wood to fit inside the plinth and screw it to the floor before attaching the pan with the provided screws.
- In both cases, ensure that you do not over-tighten the screws as this can cause damage to the pan.
- Once the screws are in place, use the provided caps to cover the screw heads and give a professional finish.
It is important to note that while a WC pan floor fixing kit can provide a secure installation, some professionals recommend also using silicone to seal the base of the pan and prevent leaks. This is especially important if you are using brass screws, as they can be more susceptible to corrosion over time.
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Secure the pan with brass screws
Brass screws are an essential component of a pan fixing kit, which is the standard method for securing a toilet pan to the floor. Brass is a suitable material for screws because it is corrosion-resistant, water-resistant, and rust-proof. This makes it ideal for both indoor and outdoor use.
To secure the pan with brass screws, you will need to identify the fixing points, which are usually two holes on either side of the pan. These holes are typically diagonal, but in some cases, they may be horizontal. If your pan has horizontal holes, you may need to cut a piece of wood to fit inside the plinth and screw that to the floor before attaching the pan with the screws.
The brass screws should be accompanied by plastic sleeves to prevent the brass from damaging the pan. The screws are typically large with a flat, round, or domed head, providing additional stability and a secure connection. The flat head design allows the screws to sit flush against the pan, resulting in a cleaner appearance and reduced risk of snagging or injury from protruding screw heads.
After securing the pan with the brass screws, you may also want to consider sealing around the base of the pan with silicone. This helps to prevent leaks and water damage. The screw holes can be filled with silicone, and caps can be installed to hide the screw heads and further protect against water ingress.
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Seal the pan with silicone
Sealant or adhesive alone is not enough to secure a toilet pan to the floor. However, applying silicone sealant around the base of the pan is an important step to stop water from getting under the pan and causing leaks.
To seal the pan with silicone, first, apply a soap and water solution to your fingers and the floor around the pan. This will prevent excess silicone from sticking to your fingers and the floor. Then, apply the silicone sealant around the base of the pan. You can also apply silicone to the back of the pan where it touches the wall, but this is not necessary if there is only a small gap. Once the silicone is applied, leave the toilet pan for at least 24 hours before applying any weight to it. This will ensure that the silicone has enough time to set properly.
It is important to note that while silicone sealant is important for waterproofing and preventing leaks, it should be used in combination with other methods such as screwing or bolting the pan to the floor to ensure a secure and stable installation.
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Use mortar to secure the pan
Using mortar to secure the pan is a common method plumbers use to fix a toilet pan to the floor. This method involves carefully turning the pan over and placing it on top of the mortar bed, ensuring that the mortar does not fall out of the pan. Once the pan is in place, it needs to be levelled off, and any excess mortar should be removed. The floor should then be cleaned with a damp sponge. It is recommended to leave the toilet pan for as long as possible before its initial use, ideally 24 hours, to allow the mortar to set completely.
To create a strong and secure bond, it is important to prepare the surface of the floor and the toilet pan before applying the mortar. The floor should be clean, dry, and free of any debris or residue. Similarly, the toilet pan should be cleaned and dried thoroughly. If there are any irregularities on the floor, such as humps or bumps, they should be smoothed out to ensure a level surface for the toilet pan to rest on.
A suitable mortar mix should be selected for this purpose. A mortar mix specifically designed for plumbing applications or a quick-setting, waterproof mortar mix can be used. It is important to follow the manufacturer's instructions for mixing the mortar to achieve the correct consistency. The mortar should be mixed in small batches to ensure it doesn't dry out before application.
When applying the mortar, it is crucial to work quickly and efficiently. The mortar should be spread evenly and generously on the floor where the toilet pan will sit. The pan should be placed onto the mortar bed and adjusted to the correct position before the mortar sets. Any excess mortar that squeezes out from under the pan should be removed, and the pan should be checked for levelness.
After securing the pan with mortar, it is important to allow adequate curing time before using the toilet. This curing process typically takes at least 24 hours, but it can vary depending on the type of mortar used and environmental conditions. During this time, it is crucial to avoid applying any weight to the pan to ensure that the mortar sets properly and creates a strong bond. Once the curing time has passed, you can confidently use the toilet, knowing that the pan is securely fixed to the floor.
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Avoid drilling through tiles
If you want to avoid drilling through tiles when fixing a WC pan to the floor, there are a few methods you can consider. However, it's important to note that drilling and using screws is generally recommended for a secure and long-lasting installation. Here are some alternative methods to consider:
Silicone Sealant: Some people suggest using a strong silicone sealant, such as CT1, to secure the WC pan to the floor. This method can be effective, but it may not be suitable for all types of toilets, especially those with large and heavy pans. It's also important to note that using only silicone sealant may make it difficult to remove the pan in the future for repairs or maintenance.
Adhesive or Glue: Another option is to use an adhesive or glue specifically designed for this purpose. Before applying the adhesive, ensure that the floor is degreased with ammonia and thoroughly dried. Apply the appropriate amount of adhesive to the toilet bowl's edge and position the bowl onto the installation site with the help of another person. Use soap and water to clean up any excess adhesive, and allow sufficient time for the adhesive to cure completely.
Alternative Fixing Methods: If your WC pan comes with a fixing kit, you can use that instead of drilling holes. Some kits use plugs and screws that secure the pan to the tiles without the need for drilling. You can also use products like Sikadur AP or Sika glue, which can provide a strong bond without drilling.
It's important to note that while these methods can avoid drilling through tiles, they may not be as secure or permanent as drilling and screwing the WC pan to the floor. Always follow the manufacturer's instructions and consider seeking professional advice if you're unsure about the best method for your specific situation.
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Frequently asked questions
You can use a WC pan floor fixing kit, which includes brass screws and chromed screw head covers. Alternatively, you can use a bead of silicone around the base, or a combination of both.
The holes are usually diagonal and you require a pan fixing kit. This includes big brass screws with plastic sleeves (so the brass doesn't damage the pan) and caps to hide the screw heads.
First, clean the floor with a damp sponge. Then, apply a bead of silicone around the base of the WC pan. Allow the silicone 24 hours to set before use.











































