If you’re planning to replace or install a new toilet, here’s what you need to know before you start, and why hiring a plumber for your toilet is often the best solution.
Before Installing A Toilet: Points To Check
Before starting your toilet plumbing installation, a few checks are necessary:
- Available space: make sure the room provides enough clearance between the wall and the toilet outlet (typically 12 inches).
 - Type of drain outlet: most toilets use a floor outlet, but some models are wall-mounted. Check your configuration before purchasing.
 - Water supply: the shut-off valve must be functional and easily accessible. If the pipe is old or corroded, it’s recommended to replace it.
 - Floor condition: it should be solid and perfectly level to ensure a proper wax seal.
 
Thinking about these details before installation helps you avoid unnecessary issues and unexpected costs.
Main Steps In Installing A Toilet
A successful toilet plumbing installation requires precision and care. Here are the main steps a plumber follows during a toilet installation:
- Remove the old toilet: Turn off the water, empty the tank, and unscrew the fasteners before removing the base.
 - Prepare the floor flange: Ensure it is clean, solid, and securely fastened.
 - Install a new wax seal: This is essential to prevent leaks between the toilet and the drain.
 - Position the new toilet: Align the bolts and press firmly for a secure seal.
 - Secure and level: Tighten the nuts without overtightening to avoid cracking the ceramic.
 - Connect the water supply: Connect the supply hose to the tank and turn on the faucet.
 - Test the installation: Flush the toilet several times to ensure there are no leaks.
 
Be careful: poor execution can lead to costly damage, which is why it is always recommended to call a plumber.
Common Mistakes To Avoid
- Overtightening the nuts can crack the base.
 - Using a worn or poorly positioned gasket can cause invisible leaks.
 - Failing to level the gasket, which can cause wobbling and water noise.
 - Ignoring a drainage problem: If your toilet is flushing improperly, it doesn’t always need to be replaced: a simple toilet unclogging could solve the problem. Moreover, depending on the location of the clog, replacing the toilet won’t necessarily correct the problem if the drain is blocked.
 
The best way to avoid mistakes, you guessed it, is to entrust the job to a professional plumber.
Why Call A Professional Plumber?
Hiring a plumber guarantees compliant, durable, and safe work. A professional has the right tools, experience, and spare parts to perform a flawless installation.
Here are some concrete benefits:
- Compliance with current plumbing standards.
 - No leaks or water infiltration.
 - Verification of proper drainage system operation.
 - Personalized advice based on your toilet type and plumbing.
 
In the event of a future problem (leak, noise or backflow), your plumber will be able to intervene quickly and efficiently.
Emergency Plumbing Montreal: Your Toilet Installation Expert
At Plomberie Urgence Montréal, we carry out the installation, repair and complete replacement of toilets, whether in a house, a condo or a commercial building.
Our plumbers in Montreal and the surrounding area ensure that every installation is carried out according to professional standards, using durable materials and proven techniques.
Whether you need a toilet plumber for new construction, a renovation, or an emergency replacement, our team is here for you.
Contact Plomberie Urgence Montréal today for a free quote and enjoy fast, professional, and guaranteed plumber service in Montreal and the North Shore.

