DIY Plumbing: How to Replace or Install a Toilet in Australia

Signs You Need a Toilet Replacement

Before you start replacing your toilet, let’s check for signs that it’s time for a toilet replacement.

Persistent Clogs That Won’t Clear

If your toilet keeps clogging despite your best efforts, it’s likely time for a new one. A toilet that constantly backs up may have issues that make it more trouble than it's worth.

Cracks or Leaks in the Bowl or Cistern

Cracks in your toilet bowl or cistern can lead to leaks. If you notice water pooling around your toilet or visible cracks, it’s time for a new toilet installation. Don’t ignore these signs, as they could lead to bigger plumbing issues down the line. If you're noticing water leaks elsewhere, we also offer professional leak detection services across Brisbane and Melbourne.

Wobbly Toilet or Water Pooling Around the Base

A wobbly toilet isn’t just annoying—it can be dangerous. If your toilet is loose, or if you notice water pooling around its base, there’s likely a problem with the wax ring seal or bolts. Both issues need fixing quickly to avoid water damage.

Older Toilets Using Excessive Water

Old toilets can waste a lot of water. If your toilet is from the pre-1990s, it’s likely using more water than necessary per flush. Upgrading to a newer, more efficient model can save you money on your water bills.

Note: A water-efficient toilet can be a good upgrade to save on future water costs.

Parts and Tools You’ll Need

Here’s a quick rundown of the parts and tools you’ll need for toilet plumbing installation.

Toilet Parts

• Closet Flange: This attaches the toilet to the drain pipe.
• Closet Elbow: Connects the flange to the waste pipe.
• Closet Bolts: Used to secure the toilet to the floor.
• Wax Ring: This ring creates a watertight seal between the toilet and drain pipe. You can choose between wax or silicone options.

Tools

• Sponge, Bucket, Towels: To clean up any remaining water.
• Adjustable Wrench, Pliers, Screwdriver: For removing bolts and tightening connections.
• Putty Knife, Hacksaw, Leveller: To remove old parts, trim pipes, and check the level of your new toilet.
• Teflon Tape, Optional Torque Wrench: For sealing pipe connections and tightening bolts.
  
  

Step-by-Step Guide to Removing Your Old Toilet

Once you have your tools ready, you can start removing the old toilet.

Step 1 – Turn Off Water Supply and Drain Toilet

Start by turning off the water supply. Then, flush the toilet to drain as much water as possible. Use a sponge and bucket to soak up any leftover water in the tank and bowl.

Step 2 – Remove the Tank

To remove the tank, unscrew the bolts that secure it to the bowl. If the bolts are stuck, apply some oil to loosen them up. If needed, use a hacksaw to cut through stubborn nuts.

Step 3 – Remove the Toilet Bowl

Now, unscrew the bolts holding the toilet to the floor. Once they’re free, tilt the toilet slightly and carefully lift it off the floor. Be careful, as toilets can be heavy!

Step 4 – Remove Old Wax Ring

With the toilet removed, you’ll see the old wax ring around the base. Use a putty knife to scrape away the wax and dispose of it safely. Make sure the area is clean before proceeding.

Installing Your New Toilet

Now comes the fun part—installing your new toilet. Here’s a step-by-step guide to get your new toilet up and running.

Step 5 – Install Closet Flange

Place the closet flange over the drainpipe and insert the closet bolts. Secure the bolts with washers and nuts. Tighten them until they’re snug, ensuring the flange is secure.

Step 6 – Set Wax Ring and Position Bowl

Place the new wax ring onto the flange, then carefully lower the toilet bowl onto it. Gently press the toilet into place, ensuring the wax ring creates a tight seal. Use a level to check that the toilet is sitting straight. You can adjust the height with coins if necessary.

Step 7 – Attach Water Tank

Now, attach the water tank to the toilet bowl. Line up the holes and attach the washers and nuts. Tighten them carefully, but avoid over-tightening as this could damage the tank.

Step 8 – Install Fill Valve (if Needed)

If your tank isn’t pre-assembled, you’ll need to install the fill valve. Thread the washers and nuts onto the valve and attach it to the tank. Ensure it’s secured tightly to avoid leaks.

Step 9 – Secure Toilet and Check Level

Once the toilet bowl and tank are in place, tighten the bolts at the base and inside the tank. Double-check the level of the toilet. If it’s off, adjust the height slightly before tightening the bolts completely.

Step 10 – Connect Water Supply

Reattach the water supply line to the tank, then slowly turn on the water. Check for any leaks around the base or tank. If you notice any, tighten the connections slightly.

Step 11 – Attach Toilet Seat

Finally, attach the toilet seat. Align it properly and tighten the screws securely, but not too tight to avoid cracking the seat.

Common Mistakes to Avoid When Replacing a Toilet

Here are a few common mistakes to watch out for:

• Overtightening Bolts: Tighten bolts carefully. Overtightening can crack your toilet or cause leaks.
• Incorrect Wax Ring Placement: Make sure the wax ring is properly placed to create a watertight seal.
• Not Checking Level: An unlevel toilet can lead to instability and leaks. Always check before securing the toilet in place.
• Reusing Old Bolts/Washers: Always replace old bolts and washers to ensure a proper, secure fit.