Complete Toilet Buying Guide 2026: Everything You Need to Know

Why Replacing or Buying a New Toilet Matters More Than You Think

A toilet is the single most-used plumbing fixture in a home -- flushed an average of 5 times per person per day according to the EPA. An older 3.5 GPF or 5 GPF model wastes thousands of gallons annually compared to a modern 1.28 GPF WaterSense-certified unit. Beyond water savings, the right toilet affects daily comfort, clog frequency, cleaning ease, and long-term maintenance costs. This guide covers every decision point so you can choose confidently.

Recommended toilets in this guide

TOTO

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Kohler

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American Standard

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Woodbridge

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What Are the Key Measurements Before You Buy a Toilet?

Rough-In Distance

Measure from the finished wall (not baseboard) to the center of the closet flange bolts. Most replacement toilets are designed for a 12-inch rough-in. If your measurement falls between 11.5 and 12.5 inches, a standard 12-inch model will fit. If your rough-in is 10 inches or 14 inches, you need a model specifically designed for that dimension -- fewer options exist, but TOTO, American Standard, and Kohler all manufacture models in non-standard rough-in sizes.

Bowl Footprint and Tank Projection

Check the distance from the wall to the front of the bowl (typically 28 to 31 inches for elongated, 25 to 28 inches for round). Verify there is at least 18 inches of clear space from the bowl centerline to any side wall or obstruction per standard building codes, and 24 inches of clearance in front of the bowl for comfortable use.

Rim Height

Standard toilets have a rim height of 14 to 15 inches. Comfort height (also called ADA height or chair height) models measure 16 to 18 inches to the top of the rim, making sitting and standing easier for taller users, older adults, and people with mobility limitations. Most new toilet sales skew toward comfort height.

How Does Flush System Type Affect Performance?

Gravity-Feed (Siphon Flush)

The dominant residential flush technology. Water released from the tank creates a siphon effect in the trapway that pulls waste through the drain. Flush performance depends on valve diameter, trapway size, and bowl geometry. Modern gravity toilets like the TOTO Drake II achieve MaP scores of 1,000 grams -- the maximum rating -- at just 1.28 GPF. Repairs are DIY-friendly: flappers, fill valves, and flush valves are inexpensive and widely available.

Pressure-Assist

Pressure-assist systems (Flushmate is the dominant manufacturer) use water supply pressure -- typically 25 to 80 PSI -- to compress air inside a plastic vessel. When the flush handle is pressed, the compressed air drives water into the bowl at high velocity. These systems are common in commercial settings and high-traffic homes. They work best with municipal water supply pressure above 25 PSI; homes on well systems with variable pressure may experience inconsistent performance. Noise is the primary drawback: flushing sounds like a compressed-air release, which can be jarring at night.

Dual-Flush

Dual-flush toilets offer two buttons or levers: a partial flush (typically 0.8 or 1.0 GPF) for liquid waste and a full flush (1.28 or 1.6 GPF) for solid waste. The TOTO Aquia IV is among the best-reviewed dual-flush models, using a 0.8/1.28 GPF split with TOTO's Tornado Flush technology. EPA WaterSense certifies dual-flush toilets based on average flush volume weighted by typical usage ratios. Real-world water savings from dual-flush depend on user behavior -- households that consistently use the partial flush see meaningful savings; those who always use the full flush do not.

Tornado / Cyclone Flush

TOTO's Tornado Flush system uses two nozzle ports to create a centrifugal water flow that coats the entire bowl surface while generating flush force, instead of the traditional rim holes found in older designs. This improves cleaning coverage and reduces mineral buildup under the rim. Kohler's AquaPiston flush valve uses a 3-inch canister valve (360-degree water flow) rather than a traditional flapper, reducing seal failures and increasing flush volume consistency.

What Bowl Shape Should You Choose: Round or Elongated?

One-Piece vs. Two-Piece Toilets: Which Is Better?

Two-Piece Advantages

Lower purchase cost (typically $100 to $400 less than equivalent one-piece models), lighter individual components for easier installation by one person, and widely available replacement parts. If the tank cracks, you replace only the tank rather than the entire unit. The TOTO Drake (two-piece) and Kohler Highline (two-piece) are perennial best-sellers precisely because they offer excellent MaP performance at accessible prices.

One-Piece Advantages

Seamless appearance, easier exterior cleaning (no tank-to-bowl junction), and often a lower overall profile that suits contemporary bathroom designs. The TOTO UltraMax II and Woodbridge T-0001 are popular one-piece options that consistently earn high owner satisfaction ratings. Skirted one-piece designs -- where the base is fully enclosed -- make floor cleaning easier but can complicate flange access if plumbing repairs are ever needed.

What GPF Rating Should You Choose, and Does EPA WaterSense Matter?

Understanding GPF Tiers

Pre-1994 toilets used 3.5 to 7 GPF. The Energy Policy Act of 1992 mandated 1.6 GPF as the federal maximum starting in 1994. EPA WaterSense (launched 2006) set a voluntary standard of 1.28 GPF or less. Some states go further: California, Texas, and other drought-affected states require 1.28 GPF or less for new construction. High-efficiency toilets (HET) are defined as 1.28 GPF or less; ultra-high-efficiency toilets (UHET) use 1.0 GPF or less.

Water Savings in Practice

Replacing a 3.5 GPF toilet from the 1980s with a 1.28 GPF WaterSense model saves approximately 22 gallons per person per day based on five flushes. For a family of four, that is roughly 32,120 gallons per year -- equivalent to more than 48 bathtubs worth of water. Many municipalities offer rebates of $50 to $200 for WaterSense toilet upgrades; check the EPA WaterSense rebate finder at epa.gov/watersense for programs in your area.

How Do You Evaluate Flush Power and Clog Resistance?

MaP Score as the Gold Standard

The MaP (Maximum Performance) testing protocol, maintained by Veritec Consulting and Kiwa, uses a standardized media to simulate solid waste loads. Toilets are tested incrementally to determine the maximum load they can flush completely in one pass. A score of 500 grams is considered minimum acceptable performance; 800 grams is high performance; 1,000 grams represents maximum performance. The American Standard Champion 4, TOTO Drake II, TOTO UltraMax II, and Gerber Viper all achieve 1,000-gram MaP ratings. Scores are publicly searchable at map-testing.com.

Trapway Size and Glazing

The trapway is the S-shaped passage built into the porcelain base that carries waste from the bowl to the drain. A 2 1/8-inch fully glazed trapway is the current industry benchmark for clog resistance. The glaze reduces friction so waste moves through with less resistance. Some manufacturers claim "oversized" trapways of 2.375 inches or larger -- the American Standard Champion 4 uses a 2 3/8-inch trapway, which contributes to its near-zero clog reputation in owner reviews. Concealed skirted trapways look cleaner but offer no performance advantage over exposed trapways of equivalent diameter.

Bowl Water Surface Area

A larger water surface area in the bowl means more of the bowl interior is covered with water, reducing skid marks and odor. The TOTO Drake II's elongated bowl has a water surface of approximately 12.4 by 7.6 inches -- larger than many competitors. High water surface area also means the siphon action begins more efficiently on flush.

Top Toilet Brands: How Do TOTO, Kohler, American Standard, Woodbridge, Swiss Madison, and Gerber Compare?

TOTO

TOTO is a Japanese manufacturer that has dominated the premium residential toilet market in North America for decades. Their SanaGloss (now CeFiONtect) ion-barrier glaze creates an ultra-smooth surface that resists waste and mineral adhesion. TOTO's Tornado Flush system, used in the Aquia IV, UltraMax II, and higher-end models, generates a centrifugal rinse pattern rather than relying on rim holes. The TOTO Drake series is consistently the best-selling toilet line in the premium segment, with the Drake II two-piece achieving a 1,000-gram MaP score at 1.28 GPF. TOTO offers a one-year limited warranty on its residential toilets, with some models extending to three years.

Kohler

Kohler is the largest American plumbing brand and offers the broadest residential toilet lineup, from the budget-friendly Wellworth ($150 range) to the Numi 2.0 smart toilet (above $5,000). The Kohler Cimarron and Highline are perennial top sellers, both featuring the AquaPiston 3-inch canister flush valve that generates 30 percent more surface coverage than a standard 2-inch valve per Kohler's published specifications. Kohler's Class Five flushing technology -- found in Cimarron and Highline Arc models -- achieves 1,000-gram MaP scores at 1.28 GPF. Kohler offers a one-year limited warranty on most residential toilets, with longer coverage on selected finishes.

American Standard

American Standard is an accessible, widely distributed brand known primarily for the Champion 4 -- arguably the best-known clog-resistant toilet in North America. The Champion 4's 4-inch accelerator flush valve (the largest of any consumer toilet) combined with a 2 3/8-inch glazed trapway delivers its 1,000-gram MaP performance. The Cadet 3 is the mid-range alternative, featuring a 3-inch flush valve and 2 1/8-inch trapway at a lower price point. The Vormax Plus adds a side-entry jet port that redirects water to the sidewalls and under the rim for improved bowl cleaning coverage. American Standard generally offers a limited lifetime warranty on porcelain and a one-year warranty on mechanical parts.

Woodbridge

Woodbridge has grown rapidly since entering the North American market with its T-0001 one-piece elongated toilet, which has become one of the top-selling one-piece models on major retail platforms. The T-0001 uses a siphon flushing system with a 3-inch flush valve and a fully glazed trapway, achieving solid MaP test results. The brand's appeal lies in its combination of skirted contemporary styling and accessible pricing relative to TOTO and Kohler one-piece models. Woodbridge offers a one-year warranty on parts and finish.

Swiss Madison

Swiss Madison (manufactured in the United States with European design influence) occupies the contemporary design niche, offering wall-hung toilets, skirted one-piece models, and dual-flush options at mid-range prices. The Ivy and Clarence models feature fully skirted bases and soft-close quick-release seats as standard. Performance is generally adequate but MaP scores are not as consistently documented as TOTO or Kohler. Swiss Madison is a strong choice when design aesthetics are the primary priority alongside acceptable flush performance.

Gerber

Gerber is a plumber-preferred brand with a reputation for durable, no-frills construction. The Gerber Viper achieves a 1,000-gram MaP score using a 3-inch flush valve and a 2 1/8-inch trapway at 1.28 GPF, and the brand's Avalanche series is known for reliability in rental properties and commercial-residential applications. Gerber toilets are less commonly found in big-box retail but are widely available through plumbing supply houses.

Special Considerations: ADA Compliance, Small Bathrooms, Septic Systems, and Smart Toilets

ADA and Comfort Height

ADA-compliant toilets require a finished seat height between 17 and 19 inches. Most "comfort height" or "chair height" toilets sold today fall in the 17 to 18 inch range and qualify. ADA compliance also requires clear floor space of at least 60 inches wide and 56 inches deep (for a floor-mounted toilet) in public or accessible bathrooms. For home use with elderly occupants or anyone with hip or knee concerns, comfort height is strongly recommended by occupational therapists. See our detailed ADA-compliant toilet guide for more specifications.

Small Bathrooms and Compact Toilets

In bathrooms under 35 square feet, consider a round-bowl toilet to recover 2 to 3 inches of floor depth, or a compact elongated design -- some manufacturers produce elongated bowls on shorter (17-inch) projections. Wall-hung toilets, where the tank is concealed in the wall and the bowl is cantilevered, free up significant floor space and make mopping easier. However, wall-hung installations require a structural carrier frame installed in the wall and add significant cost ($800 to $1,500 for the carrier alone). See our best toilets for small bathrooms roundup for specific model recommendations.

Septic Systems

Toilets with 1.28 GPF or lower reduce the load on septic systems by sending less water to the tank per flush, which extends pump intervals. All standard residential toilets are septic-safe; the concern is not the toilet itself but what goes down it. Avoid flushing wipes (even "flushable" ones), paper towels, or excessive toilet paper in households on septic. Some septic-specific toilet models use ultra-low 0.8 GPF to minimize water input, which can be appropriate in systems with limited drain field capacity. Read our septic-safe toilet guide for full recommendations.

Smart Toilets

Smart toilets (also called bidet toilets or integrated bidet seats) combine wash, dry, heated seat, and often deodorizing functions with the toilet. TOTO's Washlet series is the market leader; the Washlet+ system integrates the bidet seat and toilet so no visible cord or hose runs between them. The TOTO Neorest, Kohler Veil, and various Woodbridge models offer smart toilet features at different price points. Smart toilets require a nearby GFCI outlet for power -- check your bathroom's electrical access before purchasing. See our best smart toilets guide for a full breakdown.

Toilet Installation: DIY or Professional?

Replacing an existing toilet with a new toilet in the same footprint is one of the more accessible DIY plumbing projects. The process involves: shutting off the water supply, flushing to empty the tank and bowl, disconnecting the supply line, removing the old toilet (unbolting from the floor flange), replacing the wax ring, setting the new toilet, and reconnecting water. Tools required: adjustable wrench, putty knife, bucket, and a second person to help lift a heavy one-piece unit.

Hire a licensed plumber for: new rough-in plumbing (installing where no toilet existed), wall-hung toilet carrier installation, any repair to the closet flange (broken flange requires cutting the subfloor), or if the shutoff valve is corroded and will not close fully. Plumber installation cost for a straightforward toilet swap typically ranges from $150 to $350 in labor, not including the toilet.

How to Choose the Right Toilet Seat

Most toilets are sold without a seat, or with a basic seat that users often replace. Match seat shape precisely (round or elongated -- they are not interchangeable). Soft-close hinges that prevent seat slamming are now a standard feature on mid-range and premium seats. Quick-release hinges allow the seat to unclip entirely from the bowl for deep cleaning -- a feature worth prioritizing. Heated seats (typically requiring an outlet) are available as standalone additions. Bidet seats replace the existing seat entirely and require both a water connection and an electrical outlet.

Warranty, Longevity, and Long-Term Costs

The porcelain bowl and tank of a quality toilet can last 20 to 50 years or longer; the mechanical components (flapper, fill valve, flush valve, wax ring) wear out and require replacement every 5 to 15 years depending on water quality and usage. Hard water accelerates mineral buildup on flush valve seats and flappers, causing ghost flushing and phantom running. Toilets using universal 3-inch flapper valves are the easiest and cheapest to maintain; proprietary fill and flush valve systems (common in some TOTO models) require brand-specific parts that cost more but are still widely available online.

When evaluating total cost of ownership, factor in water savings over the expected life of the toilet. Replacing a 3.5 GPF toilet from 1990 with a 1.28 GPF WaterSense model in a household of four saves approximately $100 to $200 per year in water and sewer costs, meaning the toilet pays for itself within a few years in water savings alone.