How to install a new toilet

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Installing a new toilet may seem like a daunting task, but with the right tools and knowledge, it can be a relatively simple project. Whether you’re replacing an old toilet or installing one in a new bathroom, the process is the same. In this article, we’ll guide you through the steps to install a new toilet.

Tools and Materials Required

Before you begin, you’ll need to gather the necessary tools and materials. These include:

  • A new toilet
  • Wax ring
  • Toilet bolts
  • Adjustable wrench
  • Screwdriver
  • Level
  • Silicone
  • Toilet supply line
  • Channel locks

Step 1: Remove the Old Toilet

The first step in installing a new toilet is to remove the old one. Begin by turning off the water supply to the toilet. This is usually located on the wall behind the toilet. Once the water supply is turned off, flush the toilet to drain as much water as possible from the tank and bowl.

Next, remove the nuts and washers from the bolts that secure the toilet to the floor. These are usually located at the base of the toilet, near the floor. Once the nuts and washers are removed, lift the toilet straight up and off the bolts.

Be sure to place the old toilet on a tarp or old towels to avoid any water damage or mess.

Step 2: Prepare the Area

Once the old toilet is removed, it’s time to prepare the area for the new toilet. Begin by cleaning the floor around the toilet flange. Remove any old wax residue and debris that may have accumulated over time.

Step 3: Install the Wax Ring

The wax ring is a crucial component of the toilet installation process. It seals the gap between the toilet flange and the base of the toilet, preventing leaks and odours. To install the wax ring, place it onto the flange with the rounded side up. Make sure it is centred and pressed down firmly to create a seal.

Step 4: Install the Toilet Bolts

Next, install the toilet bolts onto the flange. These bolts will secure the toilet to the floor. Place the bolts into the slots on the flange with the threaded end facing up.

Step 5: Position the New Toilet

Carefully position the new toilet onto the flange, making sure that the toilet bolts go through the holes in the base of the toilet. Press the toilet down firmly onto the wax ring to create a seal.

Step 6: Secure the Toilet

Once the toilet is in place, secure it to the floor by tightening the nuts and washers onto the toilet bolts. Be careful not to overtighten, as this can crack the base of the toilet. Use a level to ensure that the toilet is even and stable.

Step 7: Connect the Water Supply

Once the toilet is secure, it’s time to connect the water supply. Begin by installing the new toilet supply line onto the water supply valve. Tighten it with an adjustable wrench, but be careful not to overtighten.

Next, connect the other end of the supply line to the bottom of the toilet tank. Tighten it with a channel lock, being careful not to over tighten it.

Step 8: Install the Toilet Seat

The final step in the installation process is to install the toilet seat. Most new toilets come with a seat, but if yours doesn’t, you’ll need to purchase one separately. Follow the manufacturer’s instructions to install the seat onto the toilet bowl.

Step 9: Silicone Around the Base of the Toilet

To finish the installation, use a caulk gun to apply a bead of silicone around the base of the toilet. This will create a seal and prevent any water from leaking out.

Why is it better to hire a professional plumber than try to do it yourself?

While installing a new toilet may seem like a straightforward process, there are several reasons why it’s often better to hire a professional plumber than to attempt to do it yourself.

  • Experience and Expertise: Professional plumbers have years of experience and training, giving them the expertise needed to install toilets correctly. They are familiar with the various types of toilets and the components required to install them. They also have the necessary tools to ensure that the installation is done safely and efficiently.
  • Time and Convenience: Installing a new toilet can be a time-consuming process, especially if you are not familiar with the steps involved. Hiring a professional plumber can save you time and effort, as they can complete the installation quickly and efficiently. Additionally, you won’t have to worry about purchasing the correct tools and components, as the plumber will have everything needed to complete the job.
  • Safety: Installing a toilet involves working with plumbing and water supply lines, which can be dangerous if not handled correctly. A professional plumber is trained to work with plumbing systems safely, ensuring that there are no leaks or damage to your property. Additionally, if any issues arise during the installation process, a professional plumber can quickly address them, preventing any potential hazards.
  • Warranty and Guarantee: If you attempt to install a toilet yourself and encounter any issues or problems, you will likely have to pay additional fees to have them fixed. However, when you hire a professional plumber, they will typically offer a warranty or guarantee on their work, ensuring that any issues are addressed promptly and at no additional cost to you.

While it may be tempting to attempt to install a new toilet yourself, there are several benefits to hiring a professional plumber. They have the experience, expertise, and tools needed to complete the installation safely and efficiently, saving you time and effort in the process. 

Additionally, they offer a warranty or guarantee on their work, giving you peace of mind that any issues will be addressed promptly and at no additional cost to you.


Installing a new toilet is a straightforward process that can be accomplished by most DIY enthusiasts with the right tools and a bit of patience. However, it’s important to ensure that you follow the correct steps to avoid any mistakes or damage to your plumbing system.

Remember to choose the right type of toilet for your bathroom and measure the rough-in distance before making a purchase. Before starting the installation process, turn off the water supply and remove the old toilet carefully to avoid any spills or leaks.

During the installation, ensure that all components are tightened properly and the toilet is levelled. Always use the correct size wax ring and bolts to avoid any leaks. Finally, test the toilet by flushing it a few times and checking for any leaks.

If you are unsure about any aspect of the installation process, it’s always best to consult a professional plumber to avoid any costly mistakes or damage to your plumbing system.

With the above steps, you should be able to install your new toilet with ease and enjoy the benefits of a more efficient and stylish bathroom fixture.

Need a Plumber Near Me provides a wide range of plumbing services, including toilet installations, repairs and maintenance. If you need any help or advice with your toilet installation or any other plumbing issue, don’t hesitate to contact us.


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