How to Install a Toilet

Follow the steps below to learn exactly what you need to do when installing a new toilet in your bathroom. However, as this is just a rough guide, you should always look into the product manual from the manufacturer before you begin.


First things first, you will need to note down some important measurements to ensure you are shopping for the correct size rough in. To do this, you will need to measure from the wall to the nearest bolt of its waste pipe outlet.

Find a toilet

We have numerous guides to help you find a suitable model for your requirements and dimensions. Navigate through a couple of buying guides below to find a good fit.

Highest rated toilets

Most efficient toilets

Best flushing toilets

Removal of the old toilet (if required)

If you haven’t done so already, you will need to remove the old toilet using these easy to follow steps.

  1. Ensure that the water supply is turned off.
  2. Once it’s off, you can begin emptying the contents of both the tank and bowl by flushing water away and removing it by either pumping it out or simply use a cup to lower the water levels bit by bit until empty. It has been suggested that you can soak up the last remaining drops with a dry sponge.
  3. Unscrew the nuts and bolts connecting the tank and bowl together so that you have two separated pieces – one bowl, one tank.
  4. Loosen the bolts at the base of your loo. Depending on the brand and age of your model, you may have anything between two and four bolts to loosen. You should be aiming to detach it from the floor by doing so.
  5. You may find that even after you’ve removed those bolts, the putty or max holding it in place may make the base removal that little bit more of a difficult task. You may want to do your best to scrape away said way or simply twist and rock it the best you can until it comes free.
  6. Now you will be exposed to the waste outlet pipe. You should find something to cover and plug this hole the best you can to prevent any overpowering gases from entering the area where you’re working. This is an important step, don’t skip it.
  7. Clean and scrape off the remaining wax from the base and ensure the mounting plate area is cleared of clutter ready for the installation of your new one.

Installation guide

Before you install your new toilet, always have a read through the instruction manual that comes with your product.

  1. The first job will be mounting the bowl onto the waste pipe outlet. To do so you will now need to ensure you have applied the wax ring on the rim of its waste horn underneath the bowl. Ensure that when turning the unit over to apply said wax, that you’ve padding of some form underneath to prevent unnecessary damage on the bowl.
  2. Now your ready to mount it to the flange. Turn it back over, remove the plugging you have put into the waste pipe to prevent gasses escaping and screw in the bolts and washers. You don’t need to tighten them too much at this point in time. Again, make sure you’re looking at the instructions for labels and step by step guide on where each of the washers go.
  3. Apply pressure on the bowl to help the wax ring securely hold it in place. Once you’ve done that, tighten the bolts/washers mentioned in step two.
  4. To prevent leakage and further measures to secure it in place, consider adding sealant to the outskirts of the base.
  5. Now it’s time to install the tank. Install gasket to base of tank, taking great care and reading the manufacturer’s directions.
  6. One you have installed the gasket above, you will now need to attach and mount it on the bowl. This will usually include screws and rubber washers through the bottom of the tank on the back of the bowl.
  7. Place the toilet seat on top and screw into position. Some seats require different techniques to hold them in place, so be sure to read the manual.
  8. Attach the water supply pipe to the tank.
  9. Tweak the flushing mechanism to achieve an effective flush on the lever that isn’t too tight and not too loose.
  10. You’re finished.

Please remember this is just a rough outline of what to expect at each step. You should always browse through the step by step guide that comes with it to find clear and concise, well labelled instructions that have images to back it up. Failure to do so may cost you money in the long term through repair bills.