How to Install a Toilet Step by Step

Toilet installation may seem like a daunting task, but with the right knowledge and preparation, it can be a straightforward process. Whether you're replacing an old toilet or installing a new one in a newly constructed space, understanding the steps involved is crucial to ensuring the proper functioning and longevity of the fixture. This guide aims to provide a comprehensive overview of the entire process of removing an old toilet and installing a new one, covering everything from preparing the area and gathering necessary tools to connecting the pipes and securing the toilet in place.  Let's get started!

Step 1: Instructions and Precautions:

Before embarking on toilet installation, it's crucial to assess your skill level and determine whether you're willing to tackle the job yourself. While installing a toilet doesn't necessarily require advanced plumbing knowledge, it does demand precision and attention to detail. If you lack confidence in executing the process correctly, it's best to consult a professional plumber.

The entire installation process typically takes 4 to 6 hours, including removing the old toilet and then installing the new one using sturdy brass bolts for increased durability. Skills such as soldering valves, precise positioning of the toilet, tank connection, pipe fitting, and installing the toilet seat ring are all part of this process. Additionally, you'll need to gather the necessary tools and materials, which may incur costs ranging from $100 to $300, including:

  • Cutter
  • Bolts
  • Wax ring
  • Wrench
  • Scraper
  • Sponge or rag
  • And more

Step 2: Removing the Old Toilet:

  1. Measure the Size:

Before installing the new toilet, measure the dimensions of the old toilet to ensure a proper fit in its original location and avoid unnecessary shipping costs.

Measure the Size

  1. Turn off the Water Supply:

Locate the shut-off valve situated behind the toilet and turn it clockwise to stop the water supply. Flush the toilet to drain most of the water from the tank and bowl.

Disconnect the water supply line from the bottom of the toilet tank. Keep a bucket and rags nearby to catch any remaining water.

Turn off Water Supply

  1. Remove the Tank:

Unscrew the bolts connecting the tank to the bowl. Once the bolts are removed, carefully lift the tank and set it aside.

Remove the Tank

  1. Disconnect the Bowl:

Remove the nuts from the bolts securing the toilet bowl to the floor, typically located at the base of the toilet. Use a wrench to loosen and remove the nuts.

Disconnect the Bowl

  1. Break the Seal:

The toilet bowl is sealed to the floor with a wax ring. Gently rock the toilet back and forth to break this seal. You may need to use a putty knife or scraper to assist in breaking the seal completely.

Break Seal

  1. Lift and Remove:

Once the seal is broken, lift the toilet straight up from the floor. Be prepared to tilt it slightly to drain any remaining water into the bucket.

Lift and Remove

  1. Clean and Inspect the Flange:

After removing the toilet, use a scraper or putty knife to eliminate any leftover wax from the floor flange. Thoroughly clean the area with a disinfectant cleaner.

Take a moment to inspect the flange for any damage. If it's damaged, it may require replacement.

Clean and Inspect the Flange

Step 3: Soil Pipe and Closet Flange Installation:

Begin by ensuring the area is clean and level. Utilize a spirit level to confirm and adjust the floor if necessary. Cut the pipe to the correct length using a hacksaw or tubing cutter, then smooth out any rough edges with a file. Securely attach the closet flange to the soil pipe, ensuring it sits flush against the bathroom floor and fasten it with screws.

Soil Pipe and Closet Flange Installation

Step 4: Soldering the Stop Valve:

Before soldering the stop valve, ensure to turn off the main water supply. Clean the pipe and valve fitting with a wire brush and apply flux to both surfaces. Slide the valve onto the pipe and evenly heat both parts with a blow torch. Apply solder wire to the joint, ensuring a complete seal forms. Allow it to cool undisturbed for a secure joint.

Soldering the Stop Valve

Step 5: Setting the Toilet:

Carefully lower the toilet bowl over the soil pipe, aligning the holes in its base with the bolts on the flange. Gently press down to set the toilet onto the wax ring and check for levelness using a spirit level before tightening the bolts.

Setting the Toilet

Step 6: Install and Connect the Tank:

Attach bolts and gaskets to the bottom of the tank to create a secure seal. Then, carefully lift the tank and place it onto the bowl, ensuring that the bolts align with the corresponding holes. Use a wrench to evenly secure the bolts.

Next, connect the water supply line to the bottom of the toilet tank. Choose a braided water supply line of appropriate length to ensure a snug fit without any bends or pressure on the pipes.

Installing the Tank

Step 7: Installing the Seat and Lid:

With the tank in place, you're ready to install the toilet seat and lid. Open the packaging of the new toilet seat and locate the accompanying fixing bolts. These bolts will secure the seat to the bowl. Place the seat over the edge of the toilet, aligning the holes at the back with those on the toilet bowl. Gently push down to make it sit flat on the bowl. Next, slide a washer onto each fixing bolt from underneath, then screw them into place through the aligned holes. Be careful not to tighten them too much; just ensure they are snug enough to securely fasten. Once secured, click the lid onto its corresponding hinges attached to the newly installed seat, and proceed with the lid installation. Give it a slight wiggle to ensure everything is securely fastened and there is no movement – this means you've done a great job! Now step back, admire your masterpiece, as you've successfully installed the new toilet seat and lid without the need for any plumbing services!

Supply Line and Seat Assembly

Step 8: Testing for Leaks:

After installing a toilet, it's crucial to test for leaks to ensure everything is functioning correctly. Follow these steps:

  1. Begin by turning on the water supply and allowing the tank to fill.
  2. Flush the toilet to ensure proper operation and to check for any leaks.
  3. Carefully examine the base of the toilet for any signs of water seeping out.
  4. Inspect the water supply line to ensure it remains dry.
  5. If you notice any water drips or wet spots, gently but firmly tighten all bolts. Avoid over-tightening, as it may crack the porcelain.


By carefully following these steps and adhering to safety precautions, you can successfully install the toilet and enjoy the convenience and comfort it provides for years to come. While there may be differences in brands and models, there's no need to worry because Giving Tree Home will provide detailed installation instructions with our products. You can install them according to the instructions, and if there are still any unclear areas, feel free to contact our customer service team anytime, as they will be happy to assist you!

PS: The pictures in this article are selected from superbrothers. If there is any infringement, please contact us!