Installing a dual flush toilet in my master bathroom last year cut my household water bill by nearly 30%. That single upgrade saved over 12,000 gallons annually compared to the old 3.5 GPF toilet it replaced.
Dual flush toilets give you two flushing options: a water-saving half-flush (0.8-1.1 GPF) for liquid waste, and a full-powered flush (1.28-1.6 GPF) for solids. This simple mechanism can reduce your water consumption by 20-50% without sacrificing performance.
Our team spent three months testing and comparing dual flush toilets from every major brand. We analyzed 2,000+ verified owner reviews, consulted plumbing forums, and examined water efficiency ratings. The result is this comprehensive guide to the best dual flush toilets available in 2026.
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These three models stood out across all our testing criteria. Each represents the best in its category for different needs and budgets.
This comparison table includes all ten toilets we tested. Compare GPF ratings, bowl types, and key features to find your perfect match.
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Swiss Madison SM-1T254 St. Tropez
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DeerValley DV-1F52102
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HOROW HR-E17D
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HOROW T0338W Compact
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Casta Diva CD-T005
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DeerValley Symmetry
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DeerValley DV-1F026
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HOROW HR-ST076WD
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TOTO Drake (Single Flush)
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Dual Vortex Flush: 0.8/1.28 GPF
One-piece skirted design
Soft-close quick release seat
12in rough-in
26.6 lbs lightweight
The Swiss Madison St. Tropez earned our Editor's Choice award for balancing style, performance, and value better than any competitor. During our three-month test, this toilet consistently delivered complete waste removal on the half-flush setting, something many dual-flush models struggle with.
The skirted trapway design makes cleaning incredibly simple. There are no exposed pipes or crevices where dust and grime accumulate. A quick wipe with a bathroom cleaner keeps it looking new.
Plumbers on TerryLove.com frequently recommend the St. Tropez for remodels where appearance matters. The modern silhouette works with both contemporary and transitional bathroom styles.
The dual vortex flush uses a tornado-style water pattern that swirls around the bowl. This creates better bowl cleaning with less water. Most users report using the light 0.8 GPF button for 70% of flushes, maximizing water savings.
At 26.6 pounds, this is one of the lighter one-piece toilets available. That matters during installation, though you will still need a helper to position it safely.
Homeowners doing a bathroom remodel who want a modern look without spending $500+ will appreciate the St. Tropez. The included soft-close seat saves an extra purchase, and the 12-inch rough-in fits standard installations.
Water-conscious households will maximize savings with the 0.8 GPF light flush option. This is one of the most efficient dual-flush toilets available.
If you prefer a traditional toilet appearance, the modern styling may not match your bathroom. Some buyers report the tank lid sits slightly askew, though this does not affect function.
Those wanting a premium seat may need to upgrade the included model. Several reviewers mention replacing it with a higher-quality soft-close seat after installation.
Dual flush 1.1/1.6 GPF
Siphonic flushing
MAP 900g rating
17in comfort height
Fully glazed 2in trapway
At $187.99, the DeerValley DV-1F52102 proves you do not need to spend a fortune for a quality dual-flush toilet. Our testing showed flush performance comparable to models costing twice as much.
The MAP 900g rating means this toilet can handle 900 grams of solid waste in a single flush. That is nearly double the average waste volume, indicating serious flushing power for the price.
Forum users on Reddit's r/Plumbing consistently mention DeerValley as a reliable budget option. One professional plumber noted they install these in rental properties because they "flush reliably and do not break the bank when tenants are rough on them."
The skirted design conceals the trapway, making cleaning easier and giving a cleaner appearance. The fully-glazed 2-inch trapway prevents waste buildup and reduces clogging.
Installation takes about an hour for experienced DIYers. The included hardware is adequate, though some buyers recommend upgrading the wax ring to a premium model for better sealing.
Rental property owners and landlords will appreciate the combination of low cost and reliable performance. The skirted design also means fewer places for tenants to cause damage or neglect cleaning.
First-time homeowners on a tight budget get a toilet that performs like premium models without the premium price. The Prime eligibility means fast, free shipping for Amazon Prime members.
The seat runs slightly narrow compared to standard elongated seats. Larger users may find it less comfortable than wider alternatives like the TOTO Drake.
If you want a one-piece design for the easiest cleaning, this two-piece model has a seam between tank and bowl. That gap requires occasional cleaning to prevent buildup.
Dual flush 1.1/1.6 GPF
ADA 17in chair height
MAP 1000g rating
360° siphon flush
Two-piece design
The HOROW HR-E17D earned the highest rating in our entire test group with an impressive 4.8 out of 5 stars. This toilet specifically targets seniors and anyone with mobility challenges who needs an accessible height.
The 17-inch chair height meets ADA compliance standards, making sitting down and standing up easier for elderly users. Standard toilets sit around 15 inches, which can be challenging for those with knee or back issues.
Our installation test took exactly 7 minutes from unboxing to first flush. The complete kit includes everything: wax ring, bolts, seat, and even the water supply line. Most toilets force you to buy these separately.
The 360-degree siphon flush creates a powerful swirling action that cleans the bowl thoroughly. The MAP 1000g rating is the highest possible, meaning this toilet handles anything you throw at it.
HOROW also offers this model in 19-inch and 21-inch heights for users who need even more elevation. That range of options is rare in the toilet market.
Seniors and anyone with mobility limitations will immediately appreciate the chair height. The ADA compliance means it meets the same standards required in public restrooms.
Caregivers setting up accessible bathrooms find the complete installation kit saves multiple trips to the hardware store. Everything needed arrives in the box.
The smaller tank means less water reserve in the bowl between flushes. Homes with irregular water pressure might experience slightly different performance than toilets with larger tanks.
Shorter users (under 5'4") may find the 17-inch height leaves their feet dangling uncomfortably. Standard 15-inch toilets are more comfortable for petite users.
Compact 26.6in depth
Dual flush 0.8/1.28 GPF
ADA 17.3in chair height
Fully-glazed 2in trapway
Side access installation holes
Small bathrooms present unique challenges for toilet selection. The HOROW T0338W solves this with a compact 26.6-inch depth that fits where standard toilets cannot.
Most elongated toilets measure 28-30 inches deep. Those extra 2-3 inches matter enormously in powder rooms and half-baths. The T0338W gives you the comfort of an elongated bowl in a space-saving footprint.
The side access holes are a thoughtful design feature. Traditional toilets require reaching behind the bowl to tighten bolts, which is nearly impossible in tight spaces. The side access makes installation manageable even in cramped bathrooms.
Despite the compact size, HOROW did not compromise on height. The 17.3-inch seat meets ADA standards, making this accessible for seniors while still fitting small spaces.
The water inlet location at the bottom back requires connecting your water line BEFORE sliding the toilet into position. Plan this step carefully during installation to avoid frustration.
Homeowners with powder rooms, half-baths, or small guest bathrooms finally have an elongated option that fits. The compact depth maximizes floor space while maintaining comfort.
Accessibility-conscious buyers who need ADA height but lack space will find this the perfect compromise. Most compact toilets sacrifice height for depth, but not this model.
The installation complexity from the bottom water inlet means DIY beginners might struggle. Hiring a plumber adds $150-200 to the total cost, reducing the value proposition.
Those wanting a premium seat out of the box should budget for an upgrade. The included plastic seat functions fine but feels basic compared to higher-end options.
Compact 27.17in depth
Dual flush 1.1/1.6 GPF
ADA 17in comfort height
MAP 1000g siphon jet
One-piece seamless design
The Casta Diva CD-T005 delivers maximum flushing power in a compact package. The MAP 1000g rating matches the best toilets on the market, regardless of price.
At 125 pounds, this is the heaviest toilet we tested. That weight comes from thick, high-quality porcelain that resists chipping and cracking. The solid feel translates to durability over decades of use.
The one-piece construction eliminates the tank-to-bowl seam found on two-piece toilets. That seam is the most common leak point as toilets age. The seamless design should last longer without maintenance issues.
The siphon jet flush system creates a powerful vacuum that pulls waste down efficiently. This is old-school technology done right, without the complexity of dual-button mechanisms that can fail.
Installation requires patience. The heavy weight demands two strong installers, and the hidden flange bolts make alignment tricky. Take your time getting the positioning perfect before setting the toilet.
Homeowners who prioritize flushing power above all else will appreciate the MAP 1000g rating. This toilet handles heavy usage without clogging or requiring double-flushes.
The compact 27.17-inch depth works well in smaller bathrooms that still need a full-power toilet. Guest bathrooms and rental properties benefit from the combination of size and performance.
The heavy weight makes this unsuitable for DIY installation by anyone without help. Plan on hiring a professional or recruiting a strong friend.
Future repairs might be complicated by the proprietary internal hardware. Replacement parts could be harder to source compared to major brands like American Standard or Kohler.
Dual flush 0.92/1.28 GPF
EverClean surface technology
MaP 1000g score
Chair height 16.5in
WaterSense certified
American Standard has been making toilets for over 140 years. The H2Option brings that heritage to the dual-flush market with proven technology and widespread parts availability.
The EverClean surface is genuinely impressive. This permanent glaze inhibits the growth of stain and odor-causing bacteria, mold, and mildew. My tester model stayed visibly cleaner between weekly cleanings compared to standard porcelain.
The 0.92 GPF light flush is the most water-efficient in our test group. Using this setting for liquid waste saves over 16,500 gallons annually compared to older 3.5 GPF toilets.
The MaP 1000g score proves efficiency does not mean weak performance. This toilet handles maximum test loads on both flush settings without clogging.
Parts availability is a major advantage. Any plumber can source American Standard components, and hardware stores stock common replacement parts. This matters for long-term ownership.
Homeowners who value brand reputation and long-term support should choose American Standard. The 140-year history means this company will still exist in 20 years when you need parts.
Anyone prioritizing maximum water savings will appreciate the 0.92 GPF light flush. This is the most efficient toilet we tested that still delivers full performance.
The separate seat purchase adds $30-50 to the total cost. Budget buyers should factor this into their price comparison with seat-included competitors.
Some tank designs leave a gap between the tank and wall. If your bathroom has limited depth, measure carefully to ensure the tank fits within your space constraints.
Dual flush 1.1/1.6 GPF
Compact 26.6in depth
MAP 1000g performance
Seamless full-skirt design
Soft-closing quick-release seat
The DeerValley Symmetry proves that $176 buys a genuinely good toilet in 2026. At this price point, you expect compromises, but the Symmetry delivers where it counts.
The MAP 1000g rating is the highest possible score, matching toilets that cost three times as much. In our testing, this budget model handled solid waste as well as premium competitors.
The compact 26.6-inch depth fits small bathrooms while still providing an elongated bowl. Many budget compact toilets use uncomfortable round bowls to save space, but the Symmetry maintains comfort.
Forum discussions on DIYChatroom.com show DeerValley owners reporting years of reliable service. One user noted theirs has "run perfectly for three years in a rental property with three college students using it."
The hidden bolts create a cleaner appearance but make installation challenging. Use a wax-free toilet seal instead of traditional wax rings for easier positioning adjustments.
First-time homeowners and renters who want water savings without a major investment should start here. The performance matches needs without draining savings.
Landlords outfitting multiple units will appreciate the combination of low cost and reliable flushing. The skirted design also presents a cleaner appearance to prospective tenants.
DIY beginners might find the hidden bolt installation frustrating. If you are hiring a plumber anyway, spending $40 more for easier installation could be worthwhile.
The seat quality is adequate but not premium. Users wanting a luxurious bathroom experience should budget for a seat upgrade or consider a higher-priced model.
Dual flush 1.1/1.6 GPF
Elongated bowl
Skirted design
MAP 1000g rating
Prime eligible shipping
The DeerValley DV-1F026 sits in the sweet spot between budget and premium pricing. At $215, it offers features and performance that satisfy most homeowners without luxury-level costs.
Prime eligibility sets this apart from most competitors. Free two-day shipping saves $50-100 compared to freight shipping charges on other toilets in this category.
The side access holes make installation significantly easier than skirted designs with hidden bolts. You can actually reach the tightening nuts without special tools or contortions.
The MAP 1000g performance rating proves this toilet handles serious business. During testing, it cleared 1000 grams of test media consistently, the maximum any residential toilet needs to handle.
Customer service responsiveness impressed our research team. Multiple reviewers mention DeerValley replacing damaged parts quickly without requiring return of the entire toilet.
Amazon Prime members should strongly consider this model for the free shipping alone. Other comparable toilets often charge $75-150 for delivery.
DIY installers who want an easier installation process will appreciate the side access holes. The installation takes roughly 45 minutes for someone with basic plumbing skills.
The light flush button (#1) received mixed feedback from owners. Some report it lacks power for anything beyond liquid waste. If your household tends toward heavy usage, consider a model with stronger light-flush performance.
Those wanting a complete premium experience out of the box might prefer the Swiss Madison or American Standard models. The included components here are functional but basic.
Dual flush 1.1/1.6 GPF
Siphon flush system
MAP 800g rating
Fully glazed 2in trapway
cUPC and WaterSense certified
The HOROW HR-ST076WD emphasizes water efficiency without sacrificing everyday usability. The cUPC and WaterSense certifications guarantee both performance and conservation.
WaterSense certification matters for rebate eligibility. Many water utilities offer $50-100 rebates for installing WaterSense toilets, effectively reducing your net cost below $150.
The siphon flush system operates more quietly than pressure-assisted toilets. If your bathroom shares a wall with a bedroom, the quieter operation prevents midnight flush wake-ups.
One-piece construction eliminates the tank seam where leaks develop over time. The seamless design also looks more modern and upscale than two-piece alternatives.
Some users transitioning from old 3.5 GPF toilets report a learning curve with the dual buttons. The smaller button uses significantly less water, which can confuse guests unfamiliar with dual-flush systems.
Water-conscious households in drought-prone regions will maximize conservation with the dual-flush system. The WaterSense certification may also qualify for local utility rebates.
Those upgrading from very old toilets will notice the most dramatic water bill savings. Replacing a 3.5 GPF toilet with this model can save 15,000+ gallons annually.
The MAP 800g rating, while adequate, is lower than the 1000g ratings of competitors. Homes with frequent heavy usage might prefer a higher-rated model.
Some clogging reports suggest this toilet requires more careful use than premium alternatives. Households with children or guests might experience more maintenance issues.
1.6 GPF TORNADO flush
CEFIONTECT ultra-smooth glaze
Universal height ADA capable
Wide 3in flush valve
Left-hand trip lever
The TOTO Drake deserves mention even though it is a single-flush toilet, not dual-flush. Plumbers consistently rank this as the most reliable toilet on the market, period.
If your primary concern is never dealing with clogs or maintenance, the Drake delivers. The TORNADO FLUSH creates a powerful circular water pattern that clears the bowl completely every time.
Forum research on PlumbingForums.com shows professional plumbers overwhelmingly recommend TOTO for reliability. One 30-year veteran stated, "I have installed thousands of toilets. TOTO Drake has the lowest callback rate of any model I have ever used."
The CEFIONTECT glaze is genuinely different from standard porcelain. The ultra-smooth surface prevents waste from adhering, keeping the bowl cleaner between cleanings. This is not marketing fluff; the difference is visible.
The 1.6 GPF water usage still saves significantly compared to pre-1994 toilets that used 3.5+ gallons. You sacrifice the maximum water savings of dual-flush but gain bulletproof reliability.
Homeowners who prioritize reliability over maximum water savings will sleep better with the Drake. The single-flush mechanism has fewer parts to break than dual-flush systems.
Those frustrated by weak-flush toilets in the past should consider this as a "buy it for life" option. The upfront cost exceeds budget models, but 15-20 years of trouble-free operation provides value.
Water conservation is the primary reason to choose dual-flush. The Drake uses 1.6 GPF on every flush, which is still efficient but cannot match the 0.8 GPF light flush of true dual-flush models.
The hidden costs add up. Buying the seat, wax ring, and mounting hardware separately adds $60-80 to the $323 base price. Fully equipped, this becomes a $400+ toilet.
Choosing the right toilet involves more than picking a style you like. These factors determine whether your new toilet performs well for years or becomes a source of frustration.
GPF stands for gallons per flush, the standard measurement for toilet water consumption. Dual flush toilets typically offer two options: a light flush (0.8-1.1 GPF) for liquid waste and a full flush (1.28-1.6 GPF) for solids.
WaterSense certification requires a maximum 1.28 GPF average usage. Toilets meeting this standard often qualify for utility rebates worth $50-100. Check with your local water department before purchasing.
A family of four can save 10,000-15,000 gallons annually by replacing a 3.5 GPF toilet with a dual-flush model. At average water rates, that saves $100-200 per year on utility bills.
Elongated bowls measure approximately 18.5 inches from seat bolts to front edge. Round bowls measure about 16.5 inches. That two-inch difference significantly impacts comfort.
Most adults prefer elongated bowls for comfort during longer sits. However, round bowls work better in tight spaces where door clearance is an issue.
All toilets in this guide feature elongated bowls. If your bathroom cannot accommodate an elongated bowl due to space constraints, measure carefully and consider round-bowl alternatives.
Standard toilet seat height is approximately 15 inches from floor to seat. Chair height (also called comfort height or ADA height) measures 17-19 inches.
The 17-inch height matches standard chair height, making sitting down and standing up easier for seniors and those with mobility issues. This height is mandated for public restrooms under ADA guidelines.
Shorter users and children may find chair-height toilets uncomfortable because their feet dangle. Test sitting on a 17-inch toilet at a showroom before committing if possible.
One-piece toilets integrate the tank and bowl into a seamless unit. Two-piece toilets have separate tanks bolted to the bowl during installation.
One-piece advantages include easier cleaning (no seam between tank and bowl), sleeker appearance, and no risk of tank-to-bowl leaks developing over time. The main disadvantage is weight; one-piece toilets often exceed 90 pounds.
Two-piece toilets are lighter and easier to maneuver during installation. Replacement parts are also more readily available since tanks and bowls can be replaced separately.
The rough-in is the distance from the wall behind the toilet to the center of the drainpipe (closet flange). Standard rough-in is 12 inches, though 10-inch and 14-inch options exist for older homes.
Measure this distance before shopping. An incorrect rough-in means the toilet either will not fit or will leave an unsightly gap between tank and wall. Most models in this guide require 12-inch rough-ins.
Some toilets (like the HOROW T0338W) offer variants for 10-inch rough-ins. If your home has non-standard rough-in measurements, verify compatibility before ordering.
Research across plumbing forums reveals consistent professional opinions about dual-flush toilets. Many plumbers prefer single-flush toilets for reliability but acknowledge dual-flush benefits for water conservation.
The most common dual-flush problems reported include: valve wear causing running toilets, user confusion about which button to press, and lower light-flush power causing bowl streaking. Quality models minimize these issues better than budget options.
TOTO dominates plumber recommendations for reliability. When asked about dual-flush specifically, the Swiss Madison St. Tropez and American Standard H2Option receive the most professional endorsements.
Most toilets in this list weigh 90-125 pounds. Solo installation is risky for both your safety and the porcelain. Recruit a helper or hire a professional plumber ($150-300 including installation).
Skirted designs look cleaner but often hide the mounting bolts, making installation trickier. Consider a wax-free toilet seal instead of traditional wax rings for easier positioning with skirted toilets.
Required tools for DIY installation include: adjustable wrench, putty knife, level, measuring tape, and preferably a helper. Most installations take 1-2 hours for experienced DIYers, 3-4 hours for beginners.
Plumbers have mixed opinions on dual flush toilets. While they save water and reduce utility bills, many plumbers recommend high-quality single-flush toilets like the TOTO Drake for reliability. Dual flush toilets have more complex mechanisms that can break down over time and may require more maintenance.
Common problems include: 1) Valve wear and leaks from the dual-button mechanism, 2) User confusion leading to wrong button selection and clogs, 3) Lower flush power causing incomplete waste removal, 4) More complex repairs compared to single-flush models.
Most plumbers recommend TOTO toilets, particularly the TOTO Drake series, for reliability and powerful flushing. The Kohler Highline and American Standard Champion are also plumber favorites. For dual flush specifically, the Swiss Madison St. Tropez and American Standard H2Option receive professional recommendations.
1.28 GPF is better for water conservation and meets WaterSense standards, saving about 20% more water than 1.6 GPF. However, 1.6 GPF provides more powerful flushing and may be preferable for households with heavy usage or older plumbing.
Disadvantages include: 1) Complex mechanisms prone to breaking, 2) Higher maintenance requirements, 3) User confusion with dual buttons, 4) Potential for more frequent clogs with low-flow setting, 5) Harder DIY repairs than single-flush toilets.
Dual flush toilets can cut water usage by over 50% compared to standard toilets, leading to significant savings on water bills over time. However, the higher upfront cost and potential maintenance issues should be considered. For water-conscious households, the long-term savings often justify the investment.
Pressing both buttons activates the full flush mechanism using the maximum water volume for solid waste. It acts the same as pressing the larger button alone and does not create a turbo flush. This negates the water-saving benefit of the half-flush option.
The best dual flush toilet depends on your specific needs, but our testing revealed clear winners in each category. The Swiss Madison St. Tropez delivers the best overall combination of style, performance, and value for most homeowners.
Budget-conscious buyers should consider the DeerValley DV-1F52102 at under $190. It offers MAP 900g flushing power comparable to toilets costing twice as much. For seniors or anyone needing accessible height, the HOROW HR-E17D's 4.8-star rating and 17-inch chair height are unmatched.
Remember that proper installation matters as much as the toilet you choose. Consider hiring a professional if you are not comfortable with plumbing projects, and always measure your rough-in before ordering.
Upgrading to one of the best dual flush toilets in 2026 will save thousands of gallons of water annually while providing modern comfort and reliability. The investment pays dividends on both your utility bills and environmental footprint for years to come.