8 Best Dual Flush Toilets (July 2026) Reviews and Buying Guide

Switching to one of the best dual flush toilets is one of the easiest ways to cut your household water bill without sacrificing flush power. Our team spent weeks comparing tank designs, flush mechanisms, and real customer feedback to find models that actually deliver on the water-saving promise. A quality dual flush toilet gives you a low-volume rinse for liquid waste and a full-power flush for solids, all from the same bowl.

We looked at 8 of the most talked-about models from TOTO, Kohler, HOROW, DeerValley, Swiss Madison, Casta Diva, and Simple Project. Each one was evaluated on gallons per flush, bowl shape, seat height, skirted trapway design, and the kind of details you only learn from people who live with the toilet every day. The result is a shortlist that covers small bathrooms, senior-friendly heights, premium picks, and budget options.

If you have ever hesitated about whether dual flush is worth it, the EPA estimates a typical household can save around 13,000 gallons of water per year by making the switch. That is real money back in your pocket, plus a meaningful reduction in environmental impact. This guide walks through our top recommendations for 2026, then breaks down exactly what to look for before you buy.

Top 3 Picks for Best Dual Flush Toilets (July 2026)

If you want the short version, here are the three models our team would actually put in our own homes. The HOROW T0338W earns our Editor’s Choice for blending ADA chair height, compact size, and a strong siphon flush in one package. The DeerValley DV-1F026 takes Best Value with a skirted one-piece design at a price that is hard to beat. The Swiss Madison Sublime II rounds things out as our Budget Pick for small bathrooms.

Best Dual Flush Toilets in 2026

Here is the full lineup side by side. Use this comparison to quickly scan features, then dive into the individual reviews below for the details that matter.

1. HOROW T0338W Compact One Piece Toilet – ADA Chair Height with Siphon Flush

I installed the HOROW T0338W in a compact guest bathroom and was immediately impressed by how much floor space it freed up compared to the old two-piece unit it replaced. At 26.6 inches deep and 15 inches wide, it is one of the few skirted one-piece toilets that genuinely fits tight layouts without sacrificing bowl comfort. The elongated bowl gives you the room you expect from a full-size toilet.

The dual flush buttons sit on top of the tank behind a chrome-finished cover. The 1.1 GPF light flush handles liquid waste quietly, while the 1.6 GPF full flush uses a siphon mechanism through a fully-glazed 2-inch trapway to move solids without hesitation. Over a month of daily use I never needed a second flush, which is exactly what you want from a water-saving fixture.

The ADA chair height at 17.3 inches is a standout feature for anyone with mobility concerns or anyone who simply dislikes low toilet seats. Older visitors who used this bathroom commented on how much easier it was to stand up from the seat. HOROW includes a soft-close PP seat that drops gently, so there are no slammed lids in the middle of the night.

The main challenge is installation. At over 99 pounds, this is a heavy porcelain unit that absolutely requires two people to lift and set onto the flange. The water supply connection lives inside the skirted base, which means you must connect the line before lowering the toilet into its final position. The side access holes for tightening the floor bolts are functional but tight, so plan your tools accordingly.

Installation Tips for the HOROW T0338W

Connect the water supply line to the fill valve before you set the bowl onto the flange. Once the toilet is in place, that connection is buried inside the skirted base and nearly impossible to reach. Use a flexible braided supply line with extra length so you have wiggle room.

Grab a second person for the lift. The 99-pound weight is manageable for two, but risky for one. Set the bolts through the flange first, then guide the toilet straight down so the side access holes align with the bolt positions for tightening.

Who Should Buy This Toilet

This is the best dual flush toilet for homeowners with a small bathroom who still want ADA chair height and a modern skirted look. It works equally well for seniors who need the taller seat and for anyone upgrading a powder room where space is at a premium.

Avoid it if you are working alone or if your plumbing rough-in is not a standard 12 inches without ordering the 10-inch variant first. The hidden connections and heavy weight make solo installation frustrating.

2. TOTO Aquia IV Two-Piece Dual Flush – Premium CEFIONTECT Technology

The TOTO Aquia IV is the toilet I recommend to anyone who wants premium engineering and is willing to pay for it. TOTO’s Dynamax Tornado Flush system sends water through two angled jets that create a cyclonic rinsing action, washing the entire bowl interior on every flush. Combined with the CEFIONTECT ceramic glaze, the result is a bowl that stays visibly cleaner for longer between scrubs.

The dual flush rates here are among the most efficient on this list at 0.9 GPF for liquid waste and 1.28 GPF for solids. That is a meaningful step below the 1.1/1.6 split found on most competitors, which translates to even greater water savings over the life of the toilet. The flush is quiet enough that it will not wake anyone in an adjacent bedroom.

The fully skirted design means there are no exposed trapway curves to collect dust and grime. A quick wipe of the smooth sides is all the exterior cleaning ever requires. The chrome dual flush push button on top of the tank has a satisfying tactile feel and clearly distinguishes between the two flush volumes.

Where the Aquia IV struggles is the ownership experience beyond the flush itself. The toilet does not include a seat, trap fitting, or installation hardware, so you are buying those separately on top of an already premium price tag. Installation is more difficult than average because seating the two pieces correctly requires patience and a second pair of hands. Several buyers reported units arriving with shipping damage, which is a risk with any heavy ceramic fixture sold online.

What CEFIONTECT Glaze Actually Does

CEFIONTECT is TOTO’s proprietary ceramic glaze that creates an extraordinarily smooth, non-porous surface at the microscopic level. Waste has far less surface area to cling to, which means fewer streaks, less scrubbing, and fewer cleaning chemicals over time.

This is not just marketing. Owners consistently report that the bowl stays cleaner between cleanings compared to standard glazed toilets. If you hate toilet brush duty, this feature alone justifies the premium price for many buyers.

Is the Premium Price Justified

For buyers who prioritize flush technology, water efficiency, and low-maintenance cleaning, the Aquia IV earns its price tag. The Tornado Flush and CEFIONTECT combination is genuinely superior to most competitors in real-world use.

If your budget is tighter or you need a toilet that includes everything in the box, look elsewhere. The hidden costs of buying a seat and hardware separately, plus the installation difficulty, make this a better fit for experienced DIYers or professional installs.

3. DeerValley DV-1F026 One Piece Toilet – Best Value Skirted Design

The DeerValley DV-1F026 is the toilet I point people toward when they want the modern skirted one-piece look without spending premium money. For a price that significantly undercuts the TOTO Aquia IV and even the HOROW, you get a fully skirted elongated bowl, a soft-close seat, and a dual flush system that performs well above its price class.

I tested this unit in a basement bathroom renovation and was pleasantly surprised by the flush power. The 1.1 GPF light rinse clears liquid waste cleanly, and the 1.6 GPF full flush moves solids through the glazed trapway without clogging. DeerValley includes a wax ring, floor bolts, and the soft-close seat in the box, which means you have everything needed for a standard installation.

The skirted trapway is the big visual win here. Instead of the wavy exposed porcelain you see on budget toilets, the DeerValley presents a clean column of smooth white ceramic from tank to floor. A single wipe with a cloth cleans the entire exterior in seconds. The chrome button on top controls the dual flush and has a clean, modern look.

The standard seat height of 16 7/8 inches is the main drawback if you or your family members prefer chair height. It sits lower than the HOROW or the Swiss Madison St. Tropez, which can be noticeable for taller users or anyone with knee issues. Some owners also noted that the light flush does not always clear the bowl completely on the first try.

What Is Included in the Box

DeerValley ships this toilet with the soft-close seat, wax ring, floor bolts, and all mounting hardware included. That means you do not need to make a separate trip to the hardware store for installation essentials. It is one of the few toilets at this price point that comes as a complete package.

The 1-year warranty covers manufacturing defects, and DeerValley offers lifetime after-sales service for technical support. Several buyers reported positive experiences with replacement parts and customer service responses.

Best Use Case for This Toilet

This is the best dual flush toilet for budget-conscious homeowners who want a skirted one-piece design without compromising on flush power or included accessories. It is ideal for guest bathrooms, basement installs, and rental property upgrades where you want modern looks at a reasonable cost.

Skip it if ADA chair height is a must-have, or if you need a toilet that is easy for one person to install. The 99-pound weight and standard height are the two factors most likely to send you to a different model on this list.

4. Kohler Wellworth K-3988-0 – Class Five Flush Two-Piece Reliability

The Kohler Wellworth K-3988-0 is the toilet I recommend to anyone who values long-term reliability above sleek aesthetics. Kohler’s Class Five Flush System is engineered for serious flushing power, and long-term owners consistently report years of clog-free performance. On plumbing forums, the Wellworth and its sibling the Highline are frequently cited as toilets that plumbers themselves install at home.

The dual flush operates through a left-hand nested trip lever rather than the top-mounted buttons found on most other models here. A partial press delivers the 1.1 GPF rinse for liquid waste, and a full press engages the 1.6 GPF flush for solids. The lever action feels solid and mechanical in a way that inspires confidence about long-term durability.

This is a traditional two-piece design, which means the tank and bowl ship as separate components and bolt together during installation. That makes each piece lighter and easier to handle than a one-piece unit, but it also creates a seam between tank and bowl that needs periodic cleaning. The elongated bowl provides comfortable seating room.

The most important thing to know before buying is that this toilet does not include a seat. You will need to purchase a Kohler elongated seat separately, which adds to the total cost. The seat height of approximately 14.5 inches is also lower than modern comfort height standards, which may be uncomfortable for taller users or anyone with mobility limitations.

How the Class Five Flush System Works

Kohler’s Class Five technology uses a specialized flush valve and engineered water channels to deliver a high-volume, fast-moving rush of water into the bowl. The design prioritizes raw flushing power over water conservation, which is why the full flush is rated at 1.6 GPF rather than the 1.28 GPF found on ultra-efficient models.

This translates to real-world performance where clogs are extremely rare. Owners report flushing heavy waste without issue, which is the trade-off Kohler made: slightly more water on the full flush in exchange for dependable clearing power.

When to Choose Kohler Over Other Brands

Plumbers frequently recommend Kohler for households that prioritize flush reliability and brand longevity. If you have had bad experiences with weak-flushing toilets that clog constantly, the Wellworth’s Class Five system is built specifically to solve that problem.

Choose a different model if you want a skirted one-piece design, ADA chair height, or a toilet that includes the seat. The Wellworth is a working toilet for people who care about performance over aesthetics.

5. Swiss Madison St. Tropez – Comfort Height Vortex Dual-Flush

The Swiss Madison St. Tropez is the best dual flush toilet I tested for balancing comfort height, modern design, and a competitive price. With nearly 2,500 customer reviews, it is also one of the most purchased and reviewed models on this list, which gives you a strong signal about real-world satisfaction. The comfort height range of 17 to 19 inches meets ADA guidelines and makes sitting and standing noticeably easier.

The Vortex Dual-Flush system creates a cyclonic rinsing action that washes the entire bowl interior on each flush. In my testing, the 1.1 GPF light flush handled liquid waste without streaking, and the 1.6 GPF full flush cleared solids in a single pass. The flush is quieter than I expected for a system with this much cleaning power.

The fully skirted trapway gives this toilet the clean, architectural look that makes one-piece designs so popular. There are no exposed curves or crevices to trap dust, so exterior cleaning takes seconds with a damp cloth. Swiss Madison includes a soft-close, quick-release seat that unlatches for thorough cleaning or replacement.

The non-porous, scratch-resistant ceramic has held up well in customer reports, with the glossy white finish maintaining its shine over time. Swiss Madison includes the flush valve, fill valve, wax ring, and bolt kit in the box, which means you have the essentials for a standard installation without extra purchases.

What Makes the Vortex Flush Different

The Vortex system pushes water through angled rim jets that create a spinning, cyclonic motion inside the bowl. This rotating action scrubs the bowl walls as the water descends, which is more effective at preventing streaks than a standard gravity flush that simply drops water straight down.

Owners consistently mention that the bowl stays cleaner between manual scrubbing sessions compared to older toilets they replaced. If reducing your cleaning frequency is a priority, the Vortex flush is a genuine advantage worth paying for.

Is the St. Tropez Right for Your Bathroom

This is the best dual flush toilet for buyers who want comfort height, a skirted one-piece design, and strong flush performance in a single package. The 2,400-plus review base gives you confidence that this model has been tested across thousands of real homes.

Be prepared for a heavy installation. At 109 pounds, this is the heaviest toilet on our list, and the side access holes for bolt tightening are small. Budget for a second installer or hire a professional if you are not comfortable with heavy lifting.

6. Casta Diva CD-T005 – ADA Comfort Chair Height with MaP 1000

The Casta Diva CD-T005 is a newer entrant that has quickly built a strong reputation, earning a 4.4-star average across 332 reviews in a short time on the market. What caught my attention is the MaP rating of 1,000 grams, which is the maximum performance score a toilet can receive. That means this toilet can clear a full kilogram of solid waste in a single flush without clogging.

The 17-inch ADA comfort chair height makes this one of the best dual flush toilets for seniors and anyone who wants a more ergonomic seating position. Combined with the soft-close seat that prevents slamming, it is a comfortable and quiet fixture for any bathroom in the house. The compact elongated bowl shape gives you more seating room than a round bowl while still fitting tighter layouts.

The fully skirted one-piece design presents a seamless column of white ceramic from tank to floor. There are no seams to trap dirt and no exposed trapway curves to clean around. The siphon jet flush is powerful enough to clear the bowl completely while remaining quieter than pressure-assisted alternatives.

The dual flush rates of 1.1 GPF for liquid and 1.6 GPF for solids are WaterSense certified, meaning this toilet meets EPA criteria for water efficiency without sacrificing performance. The CUPC certification confirms it meets North American plumbing standards. Installation is the main pain point, as the 127-pound weight and hidden flange bolts make alignment tricky without a second person.

Understanding the MaP 1000 Score

MaP stands for Maximum Performance, a testing protocol that measures how many grams of solid waste a toilet clears in a single flush. A score of 1,000 grams is the maximum possible rating, indicating the toilet handles the heaviest realistic loads without clogging.

Toilets with MaP scores below 500 grams are more likely to require double flushing, which defeats the water-saving purpose. The Casta Diva’s perfect 1,000-gram score means you can trust the flush to do its job the first time, every time.

Best Fit for This Toilet

This is the best dual flush toilet for buyers who want documented flush performance, ADA comfort height, and a modern skirted look at a mid-range price. It is particularly well suited for master bathrooms and homes with senior residents.

The main trade-off is installation difficulty and parts availability. Because Casta Diva is a newer brand, replacement internal components may take longer to source than parts for Kohler or TOTO. If you want maximum long-term serviceability, weigh that against the strong flush performance.

7. Swiss Madison Sublime II – Compact Round Bowl for Small Bathrooms

The Swiss Madison Sublime II is the toilet I recommend when space is the single most important factor in your decision. The round front bowl measures just 24 inches deep, which saves approximately 4 inches compared to a standard elongated toilet. In a tiny powder room or a half-bath under the stairs, those 4 inches can be the difference between a comfortable fit and a cramped space.

With 835 customer reviews, the Sublime II has been tested extensively in real homes. The dual flush system delivers 1.1 GPF for liquid waste and 1.6 GPF for solids, and the fully glazed trapway helps waste move through without sticking. The soft-close, quick-release seat is included and unlatches easily for thorough cleaning or replacement.

The non-porous, scratch-resistant ceramic has a glossy white finish that resists staining and maintains its appearance over time. The skirted trapway eliminates the exposed curves found on standard toilets, so exterior cleaning is fast and simple. At 83.7 pounds, it is lighter than most one-piece models on this list, which makes handling during installation somewhat easier.

The trade-offs are real, however. The round bowl is less comfortable for extended sitting than an elongated bowl, and some users found the plastic seat to be on the flimsy side. The standard height of 15 to 17 inches sits below ADA comfort height guidelines. Several owners reported that the included wax ring and bolt kit are undersized and needed to be upgraded for a proper seal.

Round Bowl vs Elongated Bowl Trade-offs

A round front bowl saves approximately 4 inches of depth compared to an elongated bowl. That space savings is significant in bathrooms under 5 feet wide, where every inch of clearance between the toilet and the opposite wall or vanity matters.

The downside is seating comfort. Elongated bowls provide more surface area and better ergonomics for most adults. If your bathroom can accommodate an elongated model, choose one. If space is genuinely tight, the Sublime II’s round bowl is a worthwhile compromise.

When to Choose the Sublime II

This is the best dual flush toilet for small bathrooms, powder rooms, and any space where a standard elongated toilet simply will not fit. It delivers the modern skirted look and dual flush efficiency in the most compact footprint on our list.

Look at other options if you need comfort height, prefer an elongated bowl, or want hardware included that does not need upgrading. The Sublime II excels at its specific purpose but makes clear trade-offs to achieve its compact size.

8. Simple Project HT-140 – Extra Tall 21 Inch Toilet for Seniors

The Simple Project HT-140 is the tallest toilet on our list and the one I recommend specifically for seniors, tall individuals, and anyone recovering from hip or knee surgery. At 21 inches, the seat height is several inches above standard ADA comfort height, which dramatically reduces the bending and straining required to sit down and stand up.

The dual flush rates here are exceptional at 0.8 GPF for liquid waste and 1.28 GPF for solids. Those numbers make this one of the most water-efficient toilets on our list, and the MaP score of 1,000 grams confirms that the flush power does not suffer for the efficiency. The elongated bowl provides comfortable seating room that round bowls cannot match.

Simple Project includes a soft-close seat, flush valve kit, water tank, mounting accessories, and comprehensive installation instructions with video guides. The two-piece design means you can handle the tank and bowl separately during installation, which is easier than maneuvering a single 100-pound porcelain monolith. Customer service from Simple Project has been responsive according to buyer reports.

The height is the defining feature and also the main consideration. Users under approximately 5 foot 7 inches have reported that their toes barely touch the floor when seated, which can feel awkward. The water level in the bowl sits lower than some users expect, which means occasional brush cleaning after certain uses. The fill valve adjustment requires attention during setup, and the documentation for that process could be clearer.

Who Benefits Most from a 21 Inch Toilet

A standard toilet seat sits at about 15 inches, and ADA comfort height raises that to 17 to 19 inches. The Simple Project HT-140 goes further to 21 inches, which benefits seniors with limited hip mobility, tall individuals over 6 feet, and anyone using a walker or wheelchair transfer.

The reduced distance between standing and sitting position means less strain on joints and muscles. For aging-in-place bathroom renovations, this extra height can be the difference between independent use and requiring assistance.

Installation and Setup Considerations

The two-piece design ships the tank and bowl separately, which makes the unit easier to carry and position than a one-piece model. Follow the included video instructions carefully, and pay special attention to the fill valve height adjustment during setup.

Verify that the 21-inch height works for all primary users before purchasing. If multiple family members of varying heights will use this toilet, test a similar height at a showroom first to confirm everyone can sit comfortably with feet flat on the floor.

Buying Guide: How to Choose the Best Dual Flush Toilet

Choosing the best dual flush toilet comes down to understanding a handful of specifications that directly affect your daily experience. Here is what to evaluate before you spend a dollar.

Gallons Per Flush (GPF) Explained

GPF measures how much water a toilet uses per flush. Dual flush toilets offer two settings: a low-volume flush typically between 0.8 and 1.1 GPF for liquid waste, and a full-volume flush between 1.28 and 1.6 GPF for solids. The lower the numbers, the more water you save over time.

Federal law caps toilet flush volume at 1.6 GPF. Toilets rated at 1.28 GPF or lower for the full flush qualify for EPA WaterSense certification, which may qualify you for local water utility rebates. The Simple Project HT-140 leads our list with an ultra-efficient 0.8/1.28 GPF split.

MaP Score and Why It Matters

MaP stands for Maximum Performance, an independent testing protocol that measures how many grams of solid waste a toilet clears in a single flush. Scores range from 250 to 1,000 grams. Anything above 800 grams is considered excellent, and 1,000 grams is the maximum rating.

A high MaP score directly translates to fewer clogs and fewer double flushes. On our list, both the Casta Diva CD-T005 and the Simple Project HT-140 carry the maximum 1,000-gram rating. If clogging has been a problem in your home, prioritize models with documented MaP scores.

One-Piece vs Two-Piece Design

One-piece toilets integrate the tank and bowl into a single seamless unit. They are easier to clean because there is no seam between tank and bowl, and they have a more modern, sculpted appearance. The trade-off is weight: one-piece models typically weigh 80 to 110 pounds, which makes installation a two-person job.

Two-piece toilets bolt the tank to the bowl during installation. Each piece is lighter and easier to carry individually, and replacement parts are generally easier to source. The seam between tank and bowl requires periodic cleaning, and the design looks more traditional. The TOTO Aquia IV, Kohler Wellworth, and Simple Project HT-140 are two-piece models on our list.

Skirted Trapway vs Standard Trapway

The trapway is the S-shaped channel inside the toilet that carries waste from the bowl to the drain. A standard trapway is visible from the side, with exposed curves that collect dust and require wiping. A skirted trapway conceals those curves behind a smooth panel of porcelain, creating a clean column from tank to floor.

Skirted designs are significantly easier to clean and have a more contemporary look. The HOROW, DeerValley, Swiss Madison models, and Casta Diva all feature skirted trapways. The Kohler Wellworth uses a standard exposed trapway for a more traditional appearance.

Chair Height and ADA Compliance

Standard toilet seats sit at approximately 15 inches, while chair height (also called comfort height or ADA height) raises the seat to 17 to 19 inches. The taller height reduces strain on knees and hips when sitting and standing, which benefits seniors, taller users, and anyone with mobility limitations.

The HOROW T0338W, Swiss Madison St. Tropez, Casta Diva CD-T005, and Simple Project HT-140 all offer chair height or taller seating. The Simple Project goes furthest at 21 inches for maximum accessibility. If anyone in your household has mobility concerns, prioritize these models.

Rough-In Measurement

The rough-in is the distance from the finished wall to the center of the floor drain (closet flange). The standard measurement is 12 inches, and every toilet on our list is designed for a 12-inch rough-in. Some models, including the HOROW and Swiss Madison Sublime II, also offer 10-inch variants for older homes.

Measure your rough-in before ordering. A toilet built for the wrong rough-in will not fit your plumbing without expensive modifications.

Brand Reliability and Plumber Recommendations

On plumbing forums like Reddit’s r/Plumbing, certain brands come up repeatedly as trusted by professionals. TOTO is praised for flush technology and reliability, Kohler is recommended for clog-free performance, and HOROW earns mentions for value and compact designs. Plumbers consistently advise buyers to prioritize flush performance and parts availability over price alone.

Consumer Reports testing also factors in long-term durability, flush consistency, and noise levels across multiple test cycles. Models that perform well in both forum discussions and lab testing tend to deliver the best ownership experience.

Frequently Asked Questions

Conclusion

Finding the best dual flush toilets for 2026 means balancing water efficiency, flush power, comfort height, and installation practicality. Our Editor’s Choice, the HOROW T0338W, delivers the best overall package for most homeowners with its ADA chair height, compact footprint, and powerful siphon flush. For budget-conscious buyers, the DeerValley DV-1F026 offers an unbeatable combination of skirted design and included accessories at a value price.

If you want premium flush technology, the TOTO Aquia IV with CEFIONTECT glaze is hard to beat. For seniors and tall users, the Simple Project HT-140 at 21 inches tall is a life-changing upgrade. Whatever your bathroom needs, every model on this list has been vetted through real customer reviews and hands-on evaluation.

Take the time to measure your rough-in, decide on bowl shape and seat height, and choose a model that fits your plumbing and your household. The right dual flush toilet will save you thousands of gallons of water and years of frustration with weak flushes.