Can You Install a Toilet Yourself?

Absolutely. Toilet installation is one of the most commonly performed DIY plumbing projects, and with the right preparation it's straightforward. Most homeowners can complete the job in 2–3 hours. This tutorial covers removing your old toilet and installing a new one from start to finish.

Tools and Materials You'll Need

  • New toilet (with tank, bowl, seat, and hardware)
  • Wax ring (with horn, if your flange is recessed)
  • Adjustable wrench
  • Putty knife
  • Sponge and bucket
  • Hacksaw (for trimming closet bolts if needed)
  • Level
  • Rag or old towel
  • Plumber's putty or silicone caulk
  • New supply line (braided stainless recommended)

Step 1: Turn Off the Water and Empty the Tank

Locate the shutoff valve on the wall behind the toilet and turn it clockwise to close it. Flush the toilet to empty the tank and bowl. Use a sponge to remove any remaining water from both the tank and the bowl, and place a towel or bucket nearby to catch drips.

Step 2: Disconnect and Remove the Old Toilet

  1. Disconnect the water supply line from the bottom of the tank.
  2. Remove the plastic caps at the base of the toilet and unscrew the closet bolts (also called flange bolts) with an adjustable wrench.
  3. Rock the toilet gently side to side to break the wax seal, then lift it straight up and off the floor flange. Toilet bowls are heavy — get help if needed.
  4. Stuff a rag into the drain opening to block sewer gases while you work.

Step 3: Prepare the Flange

Use a putty knife to scrape away all remnants of the old wax ring from the floor flange. Inspect the flange for cracks or damage. A damaged flange must be repaired or replaced before proceeding — installing on a broken flange leads to leaks. Install new closet bolts in the flange slots, positioning them at equal distances on each side.

Step 4: Set the Wax Ring

Press the new wax ring onto the toilet horn (the outlet at the bottom of the bowl) with the plastic horn facing down toward the drain. Some plumbers prefer setting the wax ring on the flange — either method works. Do not reuse an old wax ring.

Step 5: Set the Toilet Bowl

Remove the rag from the drain. Carefully lower the toilet bowl straight down over the closet bolts, aligning the bolt holes in the base with the bolts. Press down firmly and evenly — the wax ring must compress fully to create a watertight seal. Do not rock the toilet once the wax has made contact.

Step 6: Secure the Bowl and Attach the Tank

Place the washers and nuts on the closet bolts and hand-tighten them. Alternate sides as you tighten to keep the bowl level. Use a wrench to snug them up — do not overtighten, as porcelain can crack. Use a hacksaw to trim any bolt that protrudes more than about ½ inch above the nut, then press on the plastic bolt caps.

If your toilet has a separate tank, attach it to the bowl by following the manufacturer's instructions, typically involving a rubber gasket, two bolts, and a nut tightened from below.

Step 7: Connect the Water Supply and Test

Attach the braided supply line to the fill valve at the bottom of the tank and to the shutoff valve on the wall. Hand-tighten, then snug with a wrench. Slowly turn the water supply back on and let the tank fill. Flush several times and check all connections for leaks.

Step 8: Apply Caulk and Install the Seat

Run a thin bead of silicone caulk around the base of the toilet where it meets the floor to prevent moisture from getting under the base. Leave the back uncaulked — this allows you to notice a leak if the wax ring ever fails. Install the toilet seat according to the package instructions.

You're Done!

A properly installed toilet should feel solid, flush cleanly, and show no signs of leaking at the base or supply line connections. If you see water pooling at the base after a few uses, the wax ring may not have seated correctly and will need to be reset.