Fast & Easy Toilet Installation: How to Replace a Toilet Yourself

By Max Hicks

Is your toilet giving you constant trouble? Sometimes it’s better to stop patching up small issues and simply install a new toilet. The good news? With the right tools, a little patience, and this step-by-step guide, you can handle a toilet installation on your own.

If DIY isn’t your thing, don’t worry—Reliant Plumbing is just a call away. But if you’re ready to dive in, here’s everything you need to know.

Tools & Supplies You’ll Need

Before you get started, gather the following tools and materials:

  • Flathead screwdriver (long)
  • Ratchet wrench
  • Channel locks
  • Mini level
  • Box cutter
  • Tub sealant
  • Wax ring (extra thick preferred)
  • Sponge (for smoothing sealant)
  • Plastic shims (optional, for leveling)
  • New supply line
  • Shop vac (to remove water)
  • Toilet hardware (factory or upgraded)

Step 1: Shut Off the Water

Locate the shut-off valve behind the toilet and turn it clockwise (righty-tighty). Confirm no water is flowing into the tank. Use a shop vac to remove all remaining water from the bowl and tank before moving forward.

Step 2: Remove the Old Toilet

Time needed: 15 minutes

  1. Use a box cutter to cut through the tub sealant around the toilet base.

    cutting tub sealant around the base of a toilet

  2. Pop off the bolt caps and loosen the nuts with channel locks.

    plumber unscrewing the bolts at the base of a toilet with a wrench

  3. Disconnect the supply line—keep a bucket handy to catch any leftover water.

    plumber unscrewing the plumbing supply line from beneath the toilet

  4. Carefully lift the toilet out (a “crab walk” technique works well).

    a plumber carrying an old toilet out of a bathroom

  5. Remove the old wax ring and clean the flange and floor area thoroughly.

    plumber, Max Hicks, removing the old wax ring from the toilet flange

Step 3: Install the Wax Ring & Set the Toilet

placing a thick wax ring into the drain on the floor where a new toilet will be installed
  • Place an extra-thick wax ring centered on the flange.
  • Align the toilet bolts with the holes and lower the toilet into place.
  • Press firmly to compress the wax ring and create a watertight seal.
  • Secure the bolts—snug but not overtight. Snap on the decorative caps.

Step 4: Connect & Level the Toilet

plumber carefully placing new toilet for installation
  • Reconnect the supply line. Tighten until secure (but don’t overtighten).
  • Slowly turn the water back on and check for leaks.
  • Use a mini level to ensure the toilet is even. If it wobbles, slide plastic shims under the low side.

Step 5: Seal the Base

plumber applying sealant to the base of a newly installed toilet

Apply clear tub sealant around the toilet base. Smooth it with a sponge or finger for a professional finish.

Step 6: Test Your Newly Installed Toilet

Give your new toilet a few test flushes. Make sure it’s stable, sealed, and leak-free. Congratulations—you’ve just completed your own toilet installation! 🚽✨

Prefer to Leave It to the Pros?

Not everyone has the time or desire to take on plumbing projects. If you’d rather skip the tools and guarantee a flawless installation, call the licensed plumbers at Reliant Plumbing. We’ll install your new toilet quickly, correctly, and with our service guarantee.

📞 Contact us today to schedule your toilet installation and enjoy reliable plumbing done right.

Posted in Blog, Plumbing Maintenance and tagged , ,

Leave a Comment