Removing and replacing a toilet may intimidate some homeowners, but it’s a straightforward process that requires no advanced plumbing skills. If you can carry the weight of the old and new toilets and make a handful of water connections with a pair of pliers, you can save yourself money by installing a new toilet yourself. 

The tasks you perform are turning your water supply off and on, installing a new wax seal, seating the new toilet, adding a new float device, and connecting water supply hoses.


    Prep Work Before Removing Toilet

    Prep work is one key to a successful toilet installation. You will need channel-lock pliers, a heavy-duty sponge, and a rag to help things go smoothly.

    Begin by turning off the water at the cutoff valve located behind the toilet.

    Newly installed toilet in bathroom.

    Flush the toilet, holding the handle down so all water drains from the tank. Some water may remain. If so, use a sponge to remove the remaining water from the tank and bowl. 

    Next, use a wrench to disconnect the water supply line from the bottom of the tank. It’s possible you can do this by hand and not need a wrench or pliers.

    Take the plastic bolt covers off the floor flange bolts on each bowl side. Unscrew the nuts and remove the washers. Work the toilet loose from the wax gasket and any caulking around the toilet base. Lift it out.

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    After cleaning old wax off the drain flange, put a rag in the drain or tape the flange to block sewer gases. The rag keeps gases out of your airspace while you install the new floor.

    When ready to install the toilet, turn the bowl on its side. Press a new wax ring around the bottom opening. If flange bolts have corrosion on them, slide them out and replace them.


    Installing New Toilet

    After removing the rag/tape, place the bowl on the drain. Press down firmly, rotating slightly to seat on the flange.

    Install washers and nuts on flange bolts. Tighten evenly on each side until firmly seated on the flange and floor.

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    Avoid over-tightening. You don’t want to crack the bowl. If needed, cut bolts with a hacksaw to allow the bolt covers to fit.

    Attach the tank to the bowl using the supplied bolts and gasket. Then, attach the supply line to the tank base. Open the cutoff valve, fill the tank, flush the toilet, and check for leaks.


    Toilet Types

    You can consider several types of toilets when replacing your existing one:

    The most common type, consisting of a separate tank and bowl. These products allow for easier transport and are more affordable.

    A single molded unit where the tank and bowl are one seamless piece. It is easier to clean but heavier and often more expensive.

    Installed directly to the wall rather than the floor, saving space. They require special installations and can be pricey.

    Feature high-tech functions such as heated seats, automatic flushing, odor control, and more. Smart toilets are the most expensive option, but they add luxury and convenience.

    Pressure-assisted toilets, or power-flush toilets, have been around since the late 1990s. They’re increasingly popular because they use less water but push waste through to septic tanks and sewer systems in a fast and efficient way. Advocates say they prevent toilet clogs. However, they can also be expensive.

    When selecting a new toilet, consider your budget, bathroom layout, design style, and any special features you may want. Also, consider the ages of the users and whether it’s time for an ADA-compliant toilet. These toilets are taller, making it easier for older people to sit down and get up.

    Consult a professional to narrow your choices.


    Common Toilet Installation Issues

    While swapping out a toilet is simple, a few issues can come up:

    • Cracked tank or bowl: Old toilets may crack when you remove bolts or jostle the unit during uninstallation. Check for cracks before installing the new toilet.
    • Leaky flange seal: If the wax ring doesn’t create a tight seal between the flange and the toilet, leaks can occur. Ensure even pressure when seating the new toilet.
    • Improperly aligned tank and bowl: Misalignment prevents proper flushing and increases the likelihood of leaks. The tank and bowl should align seamlessly.
    • Loose connections: Supply line or tank bolts that aren’t snug enough cause leaks over time. Tighten connections firmly but not to the point of cracking porcelain.
    • Damaged floor flange: If the old flange is badly corroded, it won’t hold the new toilet securely, risking leaks and rocking. It may need a flange replacement.

    Address any issues with the help of a professional if DIY fixes prove difficult. Taking time to eliminate problems guarantees successful toilet installation.

    There’s also a chance you might want to repair your toilet. Doing a repair is more difficult and advanced but sometimes is worth considering.


    So, Is Replacing a Toilet Difficult?

    While swapping a toilet on your own takes effort and patience, the process isn’t complex. The most physically demanding aspect is removing and disposing of the old unit. Otherwise, it’s mainly a matter of proper planning, following each installation step, and addressing any underlying issues with the toilet flange or surrounding floor that could undermine the integrity of the new toilet.

    There’s also a risk of damaging the new toilet if you over-tighten the toilet connections or crack the porcelain during installation. Taking your time and exercising reasonable caution at each stage prevents most mishaps. If complications arise beyond your skill level, consult a professional. Call your home supply store. Someone there can help.


    FAQs About Replacing a Toilet

    Do I need special tools to remove and install a toilet?

    You’ll need an adjustable wrench, channel lock pliers, putty knife, hacksaw, sponge, and potentially a few other basic tools. Specialty tools such as wax ring removers can help but aren’t essential.


    How do I remove the remaining water from the tank/bowl?

    Use a small plastic cup or sponge to remove the remaining water after flushing and emptying the toilet’s tank reservoir.


    What is the proper toilet flange height?

    Ideally, the flange should be ¼ inch above floor level after installation. If it’s too high or too low, leaks can occur between the flange and the toilet.


    How tight should toilet tank bolts be?

    Hand-tighten bolts first, then use a wrench for an additional quarter to half turn. Overtightening can crack the porcelain tank.


    Can I replace just my toilet bowl or tank?

    You can replace just your toilet bowl or the toilet tank, but we don’t recommend it. Manufacturers design toilet tanks and bowls together. Replacing both ensures proper fit, function, and leak protection.


    Editorial Contributors
    avatar for Jonathon Jachura

    Jonathon Jachura

    Contributor

    Jonathon Jachura is a two-time homeowner with hands-on experience with HVAC, gutters, plumbing, lawn care, pest control, and other aspects of owning a home. He is passionate about home maintenance and finding the best services. His main goal is to educate others with crisp, concise descriptions that any homeowner can use. Jon uses his strong technical background to create engaging, easy-to-read, and informative guides. He does most of his home and lawn projects himself but hires professional companies for the “big things.” He knows what goes into finding the best service providers and contractors. Jon studied mechanical engineering at Purdue University in Indiana and worked in the HVAC industry for 12 years. Between his various home improvement projects, he enjoys the outdoors, a good cup of coffee, and spending time with his family.

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