white toilet bowl with cistern

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white toilet bowl with cistern
Photo by Jan Antonin Kolar

Replacing a toilet might sound like a job best left to the pros, but it’s actually a project most homeowners can handle with a little patience and the right tools. Whether your old toilet is cracked, leaking, or simply outdated, you can swap it out in about an hour — and save yourself a hefty plumber’s bill. Here’s how to replace your toilet step by step, without calling in help.

What You’ll Need

Before you get started, gather a few basic supplies:

  • New toilet (bowl and tank)

  • Adjustable wrench

  • Sponge or shop vac

  • Wax ring (or wax-free seal)

  • Rubber gloves

  • Putty knife

  • Old towels or rags

  • Level

Step 1: Turn Off the Water Supply

Locate the shut-off valve behind your toilet and turn it clockwise to stop the water flow. Flush the toilet to drain as much water as possible from the tank and bowl. Use a sponge or shop vac to remove any remaining water — the drier it is, the cleaner your removal will be.

Step 2: Disconnect the Water Line

Use your wrench to disconnect the water supply line from the bottom of the toilet tank. Keep a towel handy — a little leftover water may drip out. If you plan to reuse the same line, set it aside carefully; otherwise, consider replacing it to ensure a leak-free connection.

Step 3: Remove the Old Toilet

Next, unscrew the two nuts holding the toilet to the floor bolts at the base. Gently rock the toilet side to side to break the seal on the wax ring, then lift it straight up and set it on an old towel or cardboard. Use a putty knife to scrape off any remaining wax from the flange on the floor. Check that the flange isn’t cracked or damaged — if it is, replace it before proceeding.

Step 4: Install the New Wax Ring

Place a new wax ring (or a wax-free rubber seal) onto the flange. The ring is what creates a watertight seal between the toilet and the drainpipe, so make sure it’s centered properly. If you’re using a wax ring, handle it gently to avoid deforming it before installation.

Step 5: Position the New Toilet

Carefully lower the new toilet bowl over the bolts, making sure it’s aligned perfectly with the flange. Press down firmly to compress the wax ring and create a good seal. Once it’s in place, secure the nuts on each side of the base — but don’t overtighten, or you could crack the porcelain. Use a level to ensure your toilet sits evenly on the floor.

Step 6: Reconnect the Water Line

Reconnect the water supply line to the base of the tank and tighten it with your wrench. Turn the shut-off valve counterclockwise to restore water flow. As the tank fills, check for any leaks at the base or connection points. If you spot moisture, gently tighten the fittings until the leak stops.

Step 7: Test and Finish Up

Once the tank is full, flush the toilet a few times to make sure everything works properly. Check again for leaks around the base, bolts, and water line. If the toilet wobbles slightly, use plastic shims to stabilize it. Then trim the excess bolt length, snap on the decorative caps, and you’re done.

Final Thoughts

Replacing a toilet isn’t as complicated as it looks — it’s mostly about following the steps in order and taking your time. In less than an hour and for under $200 (depending on your toilet model), you can have a brand-new fixture installed and working perfectly.

So before you call a plumber, grab your wrench and a wax ring. You might be surprised by how simple — and satisfying — it is to do the job yourself.