


Installing a new toilet—or replacing an old one—can be both exciting and a bit daunting. If you’re scratching your head and thinking, “How to install a toilet?”, you might start worrying about the costs piling up.
Sure, calling a toilet repair service sounds like the easy way out, but did you know it’s actually something you can do on your own? With guidance from our expert, you’re about to become a master of all things toilet installation.
Let’s get started!
What Should You Prepare Before Installing a Toilet?
Before starting with your DIY project, make sure you have everything on hand for a smooth process. Preparing the right tools and gathering your supplies beforehand will save you time and work more efficiently.
Here’s a checklist of what you’ll need:

- Adjustable Wrench
- Screwdriver
- Bucket and Sponge
- Plumber’s Putty
- Wax Ring
- New Bolts
- Level
How to Install a Toilet?
If you’re searching for how to install a toilet in Australia, rest assured that with a few easy steps, you’ll be well on your way to a functional, leak-free fixture. Let’s walk through each step so you can approach this project with confidence!
1. Prepare the Compatible Toilet

Before you start, ensure that your new toilet is the right fit for your bathroom. Proper measurements are must-do to avoid compatibility issues, especially with the standards in Australia.
To find the correct rough-in size, measure from the wall to the centre of the drainpipe. In most Australian homes, the standard rough-in size is 140mm, so be sure your new toilet aligns with this measurement.
Taking these measurements beforehand will save you the hassle of adjustments later. Of course, you don’t want additional costs as well.
2. Turn off the Water Supply

To start, locate the valve to shut off the water, usually you can find it below the toilet cistern side. Turning off the water stops any flow to the toilet, preventing unexpected leaks or spills during the process.
Once you’ve turned off the valve, flush the toilet to drain any remaining water from the bowl and cistern. Use a sponge and bucket to soak up any leftover water so you’re working with a dry area. This initial step also applies if you’re looking to replace the toilet seat.
3. Remove the Old Toilet

Next, if you’re replacing the old toilet, it’s time to take out the old unit. Carefully detach the bolts holding it in place and lift the toilet away from the floor.
Be cautious here—an older toilet can be heavy, so you may need an extra set of hands. This step also gives you a chance to inspect and replace the toilet cistern if needed.
4. Prepare the Flange and Wax Ring

With the old toilet removed, check the flange for any damage. The flange is the pipe fitting that connects the toilet to the drainpipe and helps keep everything watertight.
Set a new wax ring onto the flange to create a strong seal. This prevents any risk of an overflowing toilet, keeping unwanted leaks at bay.
5. Install the New Toilet

Now that the wax ring is in place, you’re ready for the main step: installing the toilet. Carefully lower the new unit over the bolts, making sure it’s aligned with the flange.
Once in position, press down firmly to secure the wax ring, which will help seal the connection between the toilet and the drainpipe.
Use a wrench to tighten the bolts, being careful not to overdo it, as this could crack the porcelain.
6. Connect the Water Supply

Finally, attach the water supply line to the toilet cistern and open the shutoff valve. Allow the cistern to fill, then test for any leaks around the base or connections. Flush the toilet to check that everything is flowing as it should and to get a feel for how the toilet works in action.
And there you have it! Now you know how to install the toilet by yourself. Save the extra cost you need for a professional for another time.
FAQ about Toilet Installation
1. Do you need a plumber to replace a toilet in Australia?
Not necessarily! If you’re confident with DIY, you can definitely do it yourself. But, if plumbing feels a bit daunting, a plumber’s expertise can make it quick and precise.
2. How long should it take a plumber to replace a toilet?
Usually, about 1–2 hours. Plumbers are pros, so they’re in and out before you know it—just enough time to make a coffee and relax!
3. How much does it cost to replace a toilet in Australia?
Costs can vary, but you’re generally looking at around $150–$400 for a basic replacement. This depends on the plumber and any extras needed, so it’s always good to get a few quotes.
4. Can you replace an old toilet with any new toilet?
Almost! Just make sure the new one matches your rough-in size (140mm is common in Australia) and fits your bathroom setup. A quick measurement check will save you a lot of trouble.
Conclusion
Installing a new toilet is absolutely something you can handle on your own with the right tools and guidance. It’s a satisfying DIY project that can save you both time and money.
However, if you’re feeling hesitant or would rather leave it to the pros, don’t worry! Call Neighbourhood Plumbing—we’re always ready to lend a hand and make sure everything’s done perfectly. Call us today!
About the Author
From unclogging the toughest drains to repairing leaking toilets, Ricky is a seasoned plumber who has brought his craftmanship to homes across Melbourne. He is passionate about sharing plumbing tips just as much as he is about fixing your plumbing issues. So, when your taps or pipes begin leaking, you know who to call.