Dual-flush toilets put you in control. You choose a lighter flush for liquids or a standard flush for solids. This simple switch saves thousands of gallons of water annually. With so many designs on the market, finding the right fit for your bathroom layout and plumbing can be tricky.
We analyzed the market to find the most efficient and stylish options available. Here are the 7 best dual-flush toilets to upgrade your bathroom today.
- Siphonic flush
- Sleek modern style
- WaterSense-certified
- 20-inch seat height
- Helpful for limited mobility
- Possibly tax deductible
- Very smooth surface
- Reduces water waste
- Elongated bowl
- Sleek modern style
- Eco-friendly
- American-made
- Very smooth surface
- 0.8 or 1.28-gallon flush
- Minimalist modern design
- Stylish design
- WaterSense-certified
- Soft-close seat
- Class 5 flush technology
- Canister flush
- Competitively priced
Understanding Dual Flush Mechanics
Standard toilets rely on a single mechanism that uses a large volume of water regardless of the waste type. Dual flush toilets feature a split-button system on the top of the tank. One button triggers a partial flush (usually 0.8 to 1.1 gallons) for liquid waste. The second button engages a full flush (1.28 or 1.6 gallons) for solid waste.
Most modern units sold in the United States are High-Efficiency Toilets (HET). These models adhere to EPA standards. They ensure you do not sacrifice flushing power while cutting water consumption by at least 20% compared to standard 1.6-gallon models.
Top Tip
Why Make the Switch?
The EPA estimates that toilets account for nearly 30% of average indoor water consumption (1). By replacing an older, inefficient model with a WaterSense-certified dual flush toilet, the average family can save nearly 13,000 gallons of water per year.
This conservation translates directly to your wallet. Lower water usage reduces monthly utility bills. Many municipalities also offer rebates for homeowners who install WaterSense-labeled products.
How We Ranked the Best Toilets
Flush Power and Efficiency
A dual flush toilet must clear the bowl in a single attempt. We looked for toilets with high Maximum Performance (MaP) scores. This score indicates how many grams of solid waste a toilet can move in one flush.
The low-flush option must clear liquid waste completely to prevent odors and staining. We prioritized models that balance low water usage (0.8 to 1.0 GPF) with strong siphon jet action to scrub the bowl clean.
WaterSense Certification
The WaterSense label is the gold standard for eco-friendly plumbing. To earn this label from the EPA, a toilet must use 1.28 gallons or less per flush on average. This is significantly lower than the federal standard of 1.6 gallons.
We prioritized WaterSense-certified models in our review. These units guarantee water savings and are often eligible for consumer rebates from local water utility companies.
Design and Trapways
Visual appeal and ease of cleaning are vital. We evaluated three main design types:
- Two-Piece Toilets: The tank and bowl are separate. These are traditional, affordable, and easier to move during installation. However, the seam between the tank and bowl can trap grime.
- One-Piece Toilets: The tank and bowl are fused into a single unit. These offer a sleek, modern look and eliminate the gap where dirt hides. They are heavier to lift but easier to maintain.
- Skirted Trapways: Many modern dual-flush toilets feature a “skirt” that covers the curvy pipe (trapway) at the base. This creates a smooth surface that is incredibly easy to wipe down, though it can make installation slightly more difficult.
Bowl Shape and Height
Comfort is subjective, but dimensions matter. We checked for two main bowl shapes:
- Elongated Bowls: These are oval-shaped and extend about 2 inches further than round bowls. They are generally more comfortable for adults and offer a larger target area.
- Round Bowls: These are circular and compact. They are ideal for small powder rooms where every inch of floor space counts.
We also considered height. Standard rims sit about 15 inches off the floor. “Comfort Height” or “Universal Height” models sit 17 to 19 inches high (similar to a dining chair), making them easier for tall individuals and seniors to use.
Rough-In Measurements
The “rough-in” is the distance from the wall to the center of the toilet’s floor bolts. The standard distance in the US is 12 inches.
However, some older homes may have 10-inch or 14-inch rough-ins. We ensured most picks in this guide fit the standard 12-inch configuration, but you must measure your space before buying to avoid a costly return.
Product Reviews
We focused on performance, installation requirements, and water-saving metrics to help you find the perfect fixture. Here are the 7 best dual flush toilets available right now.
Woodbridge T-0001/B0940 Elongated Toilet
Best Siphonic Dual Flush Toilet
The Woodbridge T-0001 is a one-piece marvel that brings a luxury aesthetic to your bathroom without the luxury price tag. Its fully skirted trapway hides the ugly piping found on traditional toilets, creating a smooth surface that is incredibly easy to clean.
This model features a siphonic flush system. This mechanism creates a powerful vacuum to pull waste down, resulting in a quieter and cleaner flush compared to standard gravity-fed units. The dual-flush buttons offer a 1.0 GPF option for liquids and a 1.6 GPF option for solids.
What We Like
- Sleek Visuals: The one-piece, skirted design eliminates dust traps and looks high-end.
- Quiet Power: Siphonic flushing technology reduces noise while effectively clearing the bowl.
- Complete Package: It comes with a pre-installed soft-closing seat and wax ring, saving you extra trips to the hardware store.
What We Don't Like
- Tricky Installation: The skirted design blocks easy access to the mounting bolts, which can make tightening them frustrating for DIY beginners.
- Heavy Lifting: This is a solid one-piece unit that weighs over 100 pounds, so you will need a helper to move it into place.
Product Specs
| Weight (pounds) | 151 |
| Dimensions (inches) | 28.5 x 14.5 x 27.2 |
| Type | One-piece |
| Seat Height (inches) | 16.5 inches |
| Bowl Shape | Elongated |
| Price | $$ |
| Warranty | 1-year limited |
Our Ratings
Convenient Height 20-Inch Toilet
Best Convenient Height Dual Flush Toilet
The Convenient Height toilet lives up to its name with a rim height of 20 inches. This is significantly taller than standard 15-inch toilets and even exceeds most ADA-compliant “comfort height” models. It is specifically engineered to help seniors and those with mobility issues sit down and stand up safely.
Despite its unique height, it does not skimp on performance. It features a high-elevation gravity flush that uses 1.28 GPF for solids and 0.9 GPF for liquids. The structural reinforcement in the bowl allows it to support higher weight capacities than standard consumer toilets.
What We Like
- Superior Accessibility: The 20-inch height dramatically reduces strain on knees and hips.
- Strong Flush: Gravity assists the water flow due to the height of the bowl, creating a forceful flush velocity.
- Solid Construction: It feels sturdy and secure, which is essential for users who rely on the toilet for stability.
What We Don't Like
- Too Tall for Some: Users under 5’4″ may find their feet dangling, which can be uncomfortable and restrict proper circulation.
- Premium Pricing: This is a specialty medical-grade product, so it costs more than a standard hardware store unit.
Product Specs
| Weight (pounds) | 120 |
| Dimensions (inches) | 27 x 15 x 36 |
| Type | Two-piece |
| Seat Height (inches) | 20 inches |
| Bowl Shape | Elongated |
| Price | $$$ |
| Warranty | 3-year chinaware and 1-year mechanical parts |
Our Ratings
American Standard H2Option Dual Flush Toilet
Dual Flush Toilet With the Best Flushing Power
The American Standard H2Option is a powerhouse for households that struggle with frequent clogs. It utilizes a PowerWash rim that scrubs the bowl with pressurized water with every flush.
This two-piece model is highly efficient, using just 0.92 GPF for liquids and 1.28 GPF for solids. It features American Standard’s EverClean surface, a permanent glaze that inhibits the growth of stain and odor-causing bacteria. This keeps the mirror-like finish looking new with less scrubbing on your part.
What We Like
- EverClean Glaze: The antimicrobial surface stays cleaner longer and resists hard water stains.
- MaP Performance: It has a high waste-removal rating, meaning fewer clogs and no need for double flushing.
- Budget Friendly: It offers commercial-grade performance at a price point accessible for most residential renovations.
What We Don't Like
- Seat Sold Separately: You must purchase a toilet seat independently, which adds a small hidden cost to the project.
- Standard Design: It lacks the skirted trapway of modern units, making the base harder to dust and clean.
Product Specs
| Weight (pounds) | 32.8 |
| Dimensions (inches) | 15 x 29.75 x 30 |
| Type | Two-piece |
| Seat Height (inches) | 15 inches |
| Bowl Shape | Elongated |
| Price | $ |
| Warranty | Lifetime warranty on the chinaware and 5-year limited mechanical parts |
Our Ratings
Woodbridge T-0019 Cotton White Toilet
Best Dual Flush Toilet for Modern Bathrooms
The Woodbridge T-0019 is the slightly more robust cousin of the T-0001. It maintains that signature seamless, one-piece design that defines modern bathroom luxury. The square, geometric lines on the tank give it a contemporary edge that suits minimalist decor.
Functionally, it offers a comfort height seating position and a powerful siphon flushing system. It is WaterSense certified, averaging 1.28 gallons per flush. The package is all-inclusive, shipping with a high-quality soft-close seat and the necessary floor bolts.
What We Like
- Architectural Design: The clean lines and skirted base make this a centerpiece fixture rather than just a utility.
- All-In-One Kit: Woodbridge includes the seat, wax ring, and bolts, streamlining the buying process.
- US Support: The company provides US-based customer service, which is helpful if you need replacement parts or installation advice.
What We Don't Like
- Access Issues: Like most skirted toilets, reaching the bolts behind the toilet to tighten them is physically difficult.
- Flush Volume: The full flush hits the 1.6 GPF mark (maximum allowed), making it less water-efficient than competitors like TOTO or Swiss Madison.
Product Specs
| Weight (pounds) | 152 |
| Dimensions (inches) | 31 x 18 x 28 |
| Type | One-piece |
| Seat Height (inches) | 18 inches |
| Bowl Shape | Elongated |
| Price | $$ |
| Warranty | 5-year limited porcelain and 1-year mechanical parts |
Our Ratings
TOTO Aquia IV Elongated One-Piece Toilet
Easiest to Clean Dual Flush Toilet
The TOTO Aquia IV represents the pinnacle of Japanese toilet engineering. It features the proprietary Dynamax Tornado Flush. This system sends 100% of the water through the rim, creating a centrifugal cyclonic action that scours the entire bowl.
This toilet also uses CeFiONtect ceramic glaze. This is an incredibly smooth, ion-barrier surface that prevents debris from adhering to the ceramic. It allows the toilet to clear waste effectively using only 1.28 GPF or 0.8 GPF, making it one of the most efficient models on our list.
What We Like
- Tornado Flush: The rimless design and cyclonic water action clean the bowl better than traditional rim holes, which often get clogged with mineral deposits.
- Ceramic Technology: The ultra-smooth glaze drastically reduces the need for harsh chemical cleaners and manual scrubbing.
- Universal Height: The seat height is optimized for a wide range of users, improving accessibility.
What We Don't Like
- Adapter Required: If you have a 10-inch or 14-inch rough-in, you must buy a separate TOTO Unifit adapter, which adds to the cost.
- High Price Point: You pay a premium for TOTO engineering and brand reputation.
Product Specs
| Weight (pounds) | 119 |
| Dimensions (inches) | 27.5 x 15.5 x 29.5 |
| Type | Two-piece |
| Seat Height (inches) | 17.5 inches |
| Bowl Shape | Elongated |
| Price | $$$ |
| Warranty | 1-year limited |
Our Ratings
Swiss Madison Well Made Forever SM-1T254 St. Tropez
Best Water-Saving Dual Flush Toilet
The Swiss Madison St. Tropez is a favorite for interior designers working with modern spaces. It features a bold, fully skirted design with a slim tank that fits well in narrow bathrooms.
Beyond its looks, it is a serious water saver. The dual-flush mechanism offers a 0.8 GPF light flush and a 1.28 GPF heavy flush. It uses “Vortex” flush technology, which swirls water around the bowl to ensure full coverage. The quick-release seat is a nice feature, allowing you to pop the seat off instantly for deep cleaning.
What We Like
- Stunning Aesthetics: The seamless porcelain design rivals toilets that cost three times as much.
- Compact Depth: The slim tank and elongated bowl design fit well in tighter bathroom layouts without sacrificing seat comfort.
- Quick-Release Seat: You can remove the seat with a button press, making it easy to clean the hard-to-reach area between the seat bolts.
What We Don't Like
- Installation Difficulty: The side holes for installation are small, making it challenging to secure the bolts without special tools or patience.
- Quality Control: Some users report minor cosmetic blemishes or shipping damage, so inspect the ceramic immediately upon delivery.
Product Specs
| Weight (pounds) | 120 |
| Dimensions (inches) | 26.6 x 15 x 31 |
| Type | One-piece |
| Seat Height (inches) | 15.5 inches |
| Bowl Shape | Elongated |
| Price | $$ |
| Warranty | 1-year limited |
Our Ratings
Kohler K-3987-0 Wellworth Toilet
Best Dual Flush Toilet for Preventing Clogs
The Kohler Wellworth brings a different technology to the table: the canister flush valve. Unlike traditional flappers that hinge open, a canister valve lifts straight up. This allows water to rush into the bowl from 360 degrees instantaneously, creating a forceful punch that clears heavy waste.
This round-front toilet is ideal for smaller bathrooms or powder rooms where an elongated bowl might block a door or cabinet. It uses a trip lever rather than top buttons, which many users find more ergonomic and familiar.
What We Like
- Canister Valve: This design is more durable than standard flappers and resists warping, preventing those annoying “ghost flushing” leaks.
- Class 5 Flushing: Kohler’s rating system certifies this toilet for bulk waste removal, reducing the need for a plunger.
- Compact Footprint: The round front saves precious inches in small half-baths.
What We Don't Like
- Seat Not Included: You will need to buy a round-front seat separately.
- Traditional Look: The exposed trapway and two-piece design look a bit dated compared to the skirted models on this list.
Product Specs
| Weight (pounds) | 86.3 |
| Dimensions (inches) | 29.25 x 18 x 27.75 |
| Type | Two-piece |
| Seat Height (inches) | 20 inches |
| Bowl Shape | Round |
| Price | $$ |
| Warranty | 1-year limited |
Our Ratings
| Product | Best | Weight | Dimensions | Type | Seat Height | Bowl Shape | Warranty |
| Woodbridge One-Piece Toilet | Siphonic | 151 lbs | 28.5 x 14.5 x 27.2″ | One-piece | 16.5″ | Elongated | 1-year limited |
| Convenient Height 20-Inch Toilet | Convenient Height | 120 lbs | 27 x 15 x 36″ | Two-piece | 20″ | Elongated | 3-year |
| American Standard H2Option Toilet | Flushing Power | 33 lbs | 15 x 29.75 x 30″ | Two-piece | 15″ | Elongated | Lifetime warranty |
| Woodbridge T-0019 Cotton White Toilet | Modern Bathrooms | 152 lbs | 31 x 18 x 28″ | One-piece | 18″ | Elongated | 5-year limited |
| TOTO Aquia IV Elongated One-Piece Toilet | Easiest to Clean | 119 lbs | 27.5 x 15.5 x 29.5″ | Two-piece | 17.5″ | Elongated | 1-year limited |
| Swiss Madison Well Made Forever St. Tropez | Water-Saving | 120 lbs | 26.6 x 15 x 31″ | One-piece | 15.5″ | Elongated | 1-year limited |
| Kohler K-3987-0 Wellworth Toilet | Preventing Clogs | 86 lbs | 29.25 x 18 x 27.75″ | Two-piece | 20″ | Round | 1-year limited |
Dual Flush Toilet FAQs
Do Dual Flush Toilets Really Save Money?
Yes, they reduce water bills significantly over time. A standard single-flush toilet uses 1.6 gallons every time you pull the handle. A dual-flush model allows you to use as little as 0.8 gallons for liquid waste. For a family of four, this reduction can save over 10,000 gallons of water annually, which translates to noticeable savings on your monthly utility bill.
What Does “Rough-In” Mean?
The rough-in is the distance from the finished wall behind the toilet to the center of the floor drain (where the bolts go). The standard measurement in the United States is 12 inches. However, older homes might have 10-inch or 14-inch rough-ins. You must measure this distance before buying, or your new toilet might not fit.
Are Dual Flush Toilets Hard to Install?
Standard two-piece dual flush toilets install exactly like traditional toilets. However, many modern dual-flush models feature “skirted” trapways. These look great but can be trickier to install because you cannot easily reach the floor bolts. If you are buying a skirted model, check if it uses a specific mounting bracket system, and consider hiring a pro if you are not a confident DIYer.
Do Dual Flush Buttons Break Easily?
Dual flush buttons are generally reliable, but they do have more moving parts than a simple gravity lever. If the buttons stick or fail, the entire button assembly is usually easy and cheap to replace. Most major brands sell replacement cartridges that you can swap out in minutes without tools.
Do Dual Flush Toilets Clog More Often?
No, provided you buy a quality model. Early dual-flush toilets struggled with bulk waste, but modern designs with siphonic jets and glazed trapways handle solids effectively. Just ensure you use the “full flush” button for solid waste; using the “half flush” button for solids is the primary cause of clogs in these units.
How Do I Clean a Dual Flush Toilet?
Clean the bowl exactly as you would a standard toilet, using non-abrasive cleaners to protect the ceramic glaze. For the tank, avoid dropping “blue tablets” or bleach pucks inside. These chemicals can warp the rubber seals on the dual-flush canister or tower, leading to leaks and “ghost flushing.”
