
Toilet bolt caps are small plastic caps found at the base of toilets. They are designed to fit either 1/4-inch or 5/16-inch threaded bolts and can be painted to match the colour of your toilet. Replacing a toilet bolt cap is a simple DIY task that can be completed in 10 to 30 minutes. This guide will explain how to fit plastic caps on toilet bolts, as well as some tips and tricks for a secure fit.
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What You'll Learn

Removing old caps: Twist, pull, or use a flat tool to pry off
Removing old caps from toilet bolts can be a challenging task due to rust and deterioration, especially if the caps have been in place for a long time. Here are some methods to remove them:
Twisting and Pulling
The simplest approach is to try twisting and pulling the caps. This method is often effective, especially if the caps are not tightly stuck. Grip the cap firmly and try twisting it counterclockwise while applying gentle upward pressure. This twisting action may break the seal, allowing you to pull the cap off.
Using a Flat Tool to Pry
If the cap is stuck, you may need to use a flat tool to pry it off. This technique requires a flat-edged tool, such as a flat-head screwdriver, a putty knife, or even a metal kitchen knife. Insert the flat edge of the tool under the cap, and gently pry upward. It is important to be cautious during this process to avoid slipping and causing injury. Wear protective gloves to minimize the risk of cuts and improve grip.
Applying Lubricant or Vinegar
In cases where the cap is tightly stuck, applying a lubricating spray or vinegar can help. Spray the lubricant or vinegar as close to the edge of the cap as possible, allowing it to reach the base. Wait a few minutes for the liquid to penetrate and loosen any rust or hard water deposits. After soaking, try twisting, pulling, or prying the cap again.
Cutting the Caps
If all else fails, you may need to resort to cutting the caps off. This method is typically a last resort, as replacement caps are inexpensive and readily available. Use a utility knife or a similar tool to carefully cut through the cap, being mindful not to damage the underlying components.
Remember, it is important to be patient and persistent when removing old toilet bolt caps. Each situation may vary, and you may need to try multiple methods or a combination of them to achieve success.
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Purchasing new caps: Ensure they correspond with your toilet system
When purchasing new caps, it is important to ensure that they are compatible with your toilet system. This includes considering the size, style, and colour of the caps.
Firstly, you need to ensure that the caps are the correct size for your bolts. Standard bolts are usually 1/4 inch or 5/16 inch in size, so you should measure your bolts and purchase caps that correspond to these measurements. Some caps may also specify the length of the bolt they are designed to fit, so check that your bolts are not too short or too long for the caps.
Secondly, consider the style of the caps. Toilet bolt caps come in a variety of styles, including snap-on caps and screw-on caps. Snap-on caps typically have a plastic washer that the cap snaps onto, while screw-on caps have an internal threaded part that screws onto the toilet bolt end. Choose the style that best fits your toilet system and that you find easier to install.
Lastly, you may want to match the colour of your toilet system. Toilet bolt caps are typically made of plastic and come in various colours, including white and almond. If you can't find the exact colour match, you can consider purchasing paintable caps and painting them to match your toilet.
By considering these factors when purchasing new caps, you can ensure that they correspond with your toilet system in terms of size, style, and colour, making the installation process smoother and the final result more aesthetically pleasing.
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Snapping new caps into place: Push down with pressure
Snapping new caps into place is a simple process. First, ensure that the toilet bolts are not too long—if they are, you will need to cut them down using a saw with a metal blade. Once you have the correct bolt length, you can slide the new cap over the top of the bolt. Apply downward pressure until you hear a snap, indicating that the cap is securely in place. This plastic piece snaps onto the washer, so it is important to ensure that the washer is properly positioned before attempting to snap on the cap.
It is worth noting that some caps may require a threaded adapter to make them fit. Threaded caps can provide a more durable hold, but they require a few additional steps for installation. After cutting down the bolts to the correct length, locate the threaded adapters that come with the bolt caps. Choose the adapter that fits snugly onto the size bolt you have and thread it into place evenly over the bolt. Then, you can screw on the cap.
If you are having trouble removing the old caps, there are a few methods you can try. Most of the time, you can simply twist and pull to remove the cap. If it is stuck, you may need to use a flat tool to pry it off. In some cases, you may need to cut the cap off. Once the old caps are removed, make sure to purchase new caps that correspond with your toilet system.
Toilet bolt caps are available in a variety of styles and colours. Some caps may require a plastic washer or a threaded adapter for installation. It is important to read the instructions that come with your specific caps to ensure proper installation. Overall, replacing toilet bolt caps is a relatively simple DIY project that can be completed in about 10 to 30 minutes.
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Using threaded caps: Thread into place evenly over the bolt
Fitting plastic caps on toilet bolts is a simple process and can be done in a few ways. One way is to use threaded caps, which are screwed into place over the bolt. Threaded caps are designed to fit onto standard bolts and come in different sizes to adapt to different bolt sizes.
To install threaded caps, first ensure the bolt is the correct length. The length of the bolt will depend on the thickness of your floor. If the bolt is too short, the cap will not work. If the bolt is too long, cut it with a saw or grinder, and then file any sharp edges with a metal file.
Once you have the correct bolt length, you can screw on the threaded cap. Place the cap over the bolt and thread it into place evenly, ensuring it is straight and does not wobble. You may need to hand-tighten the cap to ensure it is secure.
Threaded caps are a good option as they are sturdy and stay in place. They are also easy to remove for cleaning or maintenance.
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Cutting bolts: Use a saw with a metal blade
When installing a toilet, you will often find that the bolts are too long. In this case, you will need to cut the bolts to size.
To cut a bolt, you can use a saw with a metal blade. There are a variety of saws that can be used for this purpose, each with its own advantages and disadvantages.
A hacksaw is a general-purpose metal-cutting saw defined by its blade length. Hacksaws can be as small as 6 inches or as large as 24 inches. Smaller hacksaws are often cheaper and more manageable, but they require more physical effort. Conversely, larger hacksaws may require a tensioning knob or lever to provide tension to the blade, but they can make cutting larger bolts easier. Bi-metal blades can also improve cutting performance.
Reciprocating saws mimic the action of a handsaw but use a powerful motor to cut through metal fasteners with minimal effort. They are also versatile and can cut wood, plastic, and composites with the right blade.
Angle grinders are heavy-duty tools that can cut through thick bolts, but they can also be used with finesse for cutting smaller bolts.
Oscillating tool blades are angled to cut through protruding screws and other fixings flush with the surface. They are versatile and can also cut through wood, plastic, and metal.
When cutting bolts, it is important to start at the bottom of the bolt and move the blade side to side to increase the life of the blade by spreading the load across the teeth and reducing friction and wear.
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Frequently asked questions
First, make sure you have the necessary bolt cap replacements. Then, slide the cap over the top of the toilet bolt and snap it into place with some downward pressure.
If the bolt is too long, cut it down to size using a saw with a metal blade.
If the cap doesn't snap into place, you may need to use a threaded adapter to make it fit. Threaded caps are more durable but require a few extra steps. First, locate the threaded adapters that come with the caps and choose the size that fits your bolt. Then, thread it into place evenly over the bolt.
If the old cap is stuck, try twisting and pulling it off. If that doesn't work, use a flat tool to pry it off or cut it off.











































