Planning a Toilet Upgrade—Here’s What to Know Before You Start

A bright bathroom with a white toilet, sink, and a small rug. The room has tiled walls and a window covered by a sheer curtain.
The average person spends over 4,000 minutes a year on the toilet. That’s a lot of time in one place—so why settle for a toilet that’s outdated, uncomfortable, or inefficient? A modern toilet can boost comfort, lower your water use, and bring sleek style to your bathroom. But even the best toilet won’t work properly if it’s installed incorrectly. Poor installation can lead to leaks, wobbling, water damage, and costly repairs. Thinking about installing it yourself? Before you try a DIY installation, learn what separates a smooth upgrade from a frustrating (and expensive) fix.

Why Homeowners Are Upgrading Their Toilets

Today’s toilets offer more than just flushing waste. From saving water to added comfort features, the right model can transform your bathroom experience and add value to your home.Features that make a big difference:
  • Water-Saving Designs: High-efficiency models use as little as 1.28 gallons per flush—saving up to 10,000 gallons a year compared to older 3.5–7 gallon models.
  • Smart Bidets: Enjoy hands-free cleaning, warm water, air drying, and self-cleaning nozzles. Popular for hygiene and accessibility.
  • Heated Seats: No more cold porcelain on winter mornings.
  • Comfort-Height Models: Chair Height (17-19″) toilets are easier on the knees, especially for older adults or anyone with mobility concerns.
  • Sleek Styles: Clean lines and compact models make the most of tight spaces.

Key Things to Know Before Installing a New Toilet

If you’re considering a DIY install or shopping for a new model, keep these essentials in mind:

1. Water Efficiency Impacts Your Utility Bill

Toilets can account for up to 30% of your home’s indoor water use, according to the EPA’s WaterSense program. Older units (such as those with 7-gallon tanks) might flush 13,000+ gallons per year, while new models use closer to 2,300 gallons per year. That’s a significant drop in annual water use, which means major savings on your utility bill.

2. Bowl Shape Affects Comfort and Space

There are two different toilet bowl shapes: elongated vs. round. Each option has benefits depending on comfort, space, and bathroom needs.
Elongated, Oval-Shaped Bowls:
PROS
  • Provide a larger seating area for added comfort
  • Often recommended for accessibility and ease of use
  • Can improve flushing performance
  • Offer a more modern look
CONS
  • Require more physical space than round bowls
Round Bowls:
PROS
  • Take up less room, ideal for compact bathrooms
  • Fit better in smaller or older bathroom layouts
  • Typically cost less than elongated bowls
  • Provide a classic, traditional appearance
CONS
  • Have smaller seat sizes that may feel less comfortable
Professional Tip: Both options work well, but the best choice depends on how much space is available. If your bathroom is tight on space, a round bowl might be the best choice.

3. Toilet Seat Height Should Fit Everyone in the Home

Choosing the right toilet height can make a big difference in daily comfort and usability for everyone in your home.
  • 14″ Standard Toilet Height: This traditional height fits most bathrooms and works well for children and shorter adults. Taller or older users might find that sitting down and standing up requires more effort.
  • 16″ Comfort-height models: These models are taller, closer to the height of a regular chair. This makes sitting down and standing up easier for many people.
  • 17–19” ADA-compliant models: These models meet accessibility standards and are often a smart long-term choice (even for younger homeowners) because of flexibility for mobility, guests, and future needs like aging-in-place renovations.
Professional tip: Before choosing your toilet height, consider who uses the bathroom daily and how the seat height will impact overall comfort for all users in the household.

4. Measure the Space Before You Shop

Most building codes require the following measurements:
  • A distance of at least 15 inches from the toilet’s center to the nearest wall or fixture
  • A distance of at least 24–30 inches of clear space in front of the toilet for comfortable use
It’s also smart to consider elbow room—especially in compact bathrooms or half baths, where every inch counts for comfort and ease of movement.Pro-tip: Taking accurate measurements helps ensure your new toilet fits properly without crowding the room or causing installation headaches.

5. Choose the Right Flush System

When choosing a new toilet, understanding the flushing system can help you pick one that fits your needs. Two common types are gravity-flush and pressure-assisted flush toilets.
  • Gravity-Flush Toilets: Use gravity to move waste through the trapway. They’re quieter and easier to maintain but can clog more easily than pressure-assisted models.
  • Pressure-Assisted-Flush Toilets: Use compressed air to boost flush power, clearing waste more effectively with less water. They’re louder and pricier but excel in heavy-duty performance.
Need help deciding? Our team can help you compare options based on your household needs.

Skip the DIY Risks—Use a Trusted Plumber

Toilet installation might look simple—but small mistakes can lead to major repairs. Improper seals, uneven floors, or bad flange connections can cause hidden leaks, unpleasant odors, and costly water damage.Here’s what can go wrong with a DIY installation:
  • Leaks or flooding: A poorly sealed wax ring or misaligned flange can cause water to leak beneath the toilet—damaging your subfloor, causing mold growth, or even staining ceilings below.
  • Unstable seating or rocking: Uneven floors or over-tightened bolts can lead to a toilet that rocks, loosens over time, or cracks the porcelain base.
  • Clogs or poor flushing: An improperly connected drain or vent line can lead to chronic clogging, slow drainage, or incomplete flushing—especially in low-flow models.
  • Costly repairs or replacements: DIY fixes gone wrong often require a plumber to remove and reinstall everything—doubling the cost and the hassle.
  • Voided warranties: Some toilet manufacturers require professional installation to keep warranty coverage valid.
Unless you’re comfortable handling plumbing tools, codes, and proper leveling, calling a licensed plumber can save time, stress, and expensive cleanups later.

Why Homeowners Trust McQuillan Bros

Don’t leave your toilet installation to chance. With over 135 years of experience, McQuillan Bros is Minnesota’s go-to for expert plumbing and seamless, code-compliant installs. We take the time to understand your space and plumbing setup so your new toilet fits perfectly—no shortcuts, no surprises.Need help with toilet installation or plumbing repairs? Call McQuillan Bros today. Proudly serving Twin Cities homeowners with licensed, local service you can count on.
If you or someone you know needs plumbing or sewer and drain services, contact McQuillan Bros today.
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