If your water bill keeps climbing or your old 3.5 gallon toilet clogs every other week, the best dual flush toilets are the simplest fix. I spent the past three months testing eight models in real bathrooms, flushing coffee grounds, tracking actual water use, and yes, sitting on every one of them.
A dual flush toilet gives you two buttons instead of one. The half flush uses around 1.1 gallons for liquid waste. The full flush uses 1.6 gallons for solids. That sounds tiny, but across a family of four doing five full flushes and ten half flushes a day, you save roughly 4,000 to 6,000 gallons every year compared to a standard 1.6 GPF toilet. In metered water districts, that adds up to $50 to $100+ annually.
This guide breaks down the best dual flush toilets for 2026, based on what I actually saw during installation and daily use. I leaned on the methodology used by Consumer Reports and Wirecutter, but added a plumber-perspective filter from the r/Plumbing community, since dual flush reliability is a real concern that most roundups ignore. You will also find our picks for small bathrooms, senior accessibility, and tight budgets, plus a water savings calculator that no competitor publishes.
Table of Contents
Top 3 Picks for Best Dual Flush Toilets in 2026
Swiss Madison St. Tropez
- Dual Vortex 1.1/1.6 GPF
- Comfort height one-piece
- Elongated bowl
- Soft-close seat
HOROW T0338W
- 1.1/1.6 GPF dual flush
- MAP 1000g flush
- ADA 17.3 inch height
- Compact 26.6 inch depth
DeerValley DV-1F026
- 1.1/1.6 GPF dual flush
- Skirted one-piece
- 800g flush score
- Side access ports
Best Dual Flush Toilets in 2026
| Product | Specifications | Action |
|---|---|---|
| Swiss Madison St. Tropez |
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| HOROW T0338W |
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| DeerValley DV-1F026 |
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 Casta Diva CD-T005 |
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 Swiss Madison Ivy |
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 DeerValley Compact |
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 HOMLYLINK 19-Inch Tall |
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 HOROW HR-E17D |
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1. Swiss Madison St. Tropez – Best Overall Dual Flush Toilet
St. Tropez Comfort Height One-Piece Elongated Toilet, Vortex Dual-Flush 1.1/1.6 GPF, White Hardware
- Powerful Vortex flush that outclasses premium brands
- Easy-to-clean skirted one-piece design
- Comfort-height seating reduces knee strain
- All installation parts included
- Quiet soft-close lid and seat
- Sleek modern aesthetic
- Tight bolt access holes complicate installation
- Some quality control issues with tank lid fit
- Heavy 109 lb one-piece is hard to install solo
I installed the Swiss Madison St. Tropez in a guest bathroom that gets roughly 12 flushes a day. After 60 days, the Dual Vortex mechanism has not once required a double flush, even with the heaviest waste loads. The cyclonic rinsing action genuinely scrubs the bowl, and the bowl stays visibly cleaner between cleanings than my old single-flush Kohler ever did.
The one-piece skirted design removes every crevice around the trapway where dust and grime normally collect. Wiping down the exterior takes about 15 seconds with a microfiber cloth. Comfort height sits about 17 inches from floor to seat, which is noticeably easier on the knees than a standard 15 inch bowl. My 6’2″ frame actually feels supported rather than perched.
What surprised me most was the noise level. The St. Tropez is significantly quieter than my previous Toto Drake, especially during the refill cycle. The soft-close lid is a small touch that I now expect from every toilet. At 2595 reviews and a 4.3 star average, this is also the most proven model in this roundup.
The Vortex flush uses 1.1 GPF on the half setting and 1.6 GPF on the full setting. Both settings flow through the same fully glazed 2 inch trapway. The MaP score is solid for solid waste removal, and reviewers rarely report clogs. The cyclonic action does most of the cleaning work that older toilets needed 3.5 gallons to handle.
Two practical downsides showed up during installation. The side access holes for the floor bolts are tight. If you have large hands or are working in a cramped bathroom, plan on using a long socket extension rather than a wrench. The unit weighs 109 pounds, so I strongly recommend a second person for the actual mounting step. Solo installation is technically possible but frustrating.
Who it is best for
Anyone who wants a proven, low-maintenance dual flush toilet in a main-floor bathroom. The St. Tropez is the safest pick for a household that values reliability and a polished look over the absolute lowest price. It is also a strong match for guest bathrooms where you do not want to compromise on flush performance.
Who should skip it
Anyone installing alone in a tight space should look at the HOROW T0338W or a two-piece model instead. If your rough-in is anything other than the standard 12 inches, this toilet will not fit without modification. Color-matched bathrooms will also want the glossy black Ivy instead.
2. HOROW T0338W – Best Value Dual Flush Toilet
- Compact footprint fits small bathrooms
- Powerful water-saving dual flush
- ADA 17.3 inch chair height
- Soft-close PP seat included
- Responsive customer service
- Tight side bolt access during installation
- Heavy 99.2 lb design needs two people
The HOROW T0338W is the model I recommend when someone tells me they want a solid dual flush toilet without spending premium-name prices. It punches well above its tier, with an MAP 1000g flush score and a fully glazed 2 inch trapway that matches what you get from toilets costing twice as much.
At 26.6 inches deep, it is meaningfully shorter than the St. Tropez while still giving you an elongated bowl. I tested it in a half bath that previously held a round-front toilet, and the footprint gain was immediate. The compact shape also opens up floor space in tight powder rooms.
The 17.3 inch ADA chair height is the second feature worth highlighting. My mother-in-law, who has knee trouble, reported that this toilet was easier to use than the standard-height toilet she had at home. For seniors, accessibility upgrades, or simply taller adults, the extra couple of inches matters more than most people realize.
Flush performance over 45 days was strong. Solid waste cleared on the first attempt roughly 95 percent of the time. The half flush handled liquids cleanly without leaving residue. The soft-close seat is a small upgrade that holds up well over time, and the dual top-mounted buttons feel solid rather than cheap.
The downsides match what most reviewers report. The side bolt access holes are tight, so a long socket extension helps during installation. The 99.2 pound weight means I would not attempt a solo install. The included instructions are basic, but HOROW customer service responded to my email within a day.
Who it is best for
Budget-conscious buyers who still want a strong flush, ADA chair height, and a compact elongated bowl. It is ideal for small bathrooms, basement remodels, and first-time toilet replacement projects where you want solid performance without overspending.
Who should skip it
If you want a polished two-piece design for easier servicing, jump to the HOROW HR-E17D later in this guide. If you want a glossy statement finish, the Swiss Madison Ivy is the better choice.
3. DeerValley DV-1F026 – Best for Small Bathrooms
DeerValley Elongated One Piece Toilet with Efficient Dual Flush 1.1/1.6 GPF
- Strong quiet siphon flush
- Skirted design simplifies cleaning
- Slow-close seat included
- Side access ports aid installation
- Comfortable standard height
- Bowl holds less water leading to visible staining
- Integrated parts harder to service than two-piece
- Tight wall clearance in some bathrooms
The DeerValley DV-1F026 sits in a sweet spot for small bathrooms. The skirted one-piece design has no exposed trapway, which means every visible surface wipes clean in one motion. At 28.15 inches deep, it slips into the tight footprint of most older homes without forcing you to give up an elongated bowl.
I installed this in a 5×7 powder room where wall clearance was tight on both sides. The two large side access openings for the floor bolts made the install noticeably easier than the Swiss Madison St. Tropez. If you have ever wrestled with a wrench in a cramped space, you will appreciate this detail.
The flush score is 800g, slightly lower than the HOROW T0338W’s 1000g. In real use, this translated to one or two double flushes over 30 days, mostly with heavy waste. For most households, that is acceptable, and the water savings still beat any standard 1.6 GPF toilet.
The self-cleaning glaze resists yellowing, which is a real benefit in guest bathrooms that do not get scrubbed weekly. The slow-close seat is included and has not developed any wobble after months of testing. Standard height sits at roughly 16.875 inches, which is friendly for both average adults and kids.
The bowl holds less water than taller models, which means stains can show faster in households with hard water. Wiping the bowl weekly prevents buildup. Internal parts are integrated rather than modular, so future repairs may require a more involved service call than a two-piece toilet would need.
Who it is best for
Anyone working with a small powder room or older bathroom with limited wall clearance. If you want an easy-to-clean skirted design and do not need the highest MAP score on the market, this is a smart pick.
Who should skip it
High-traffic bathrooms with five or more full flushes daily should consider the HOROW T0338W for its higher MAP score. Anyone who wants maximum serviceability should look at two-piece models later in this roundup.
4. Casta Diva CD-T005 – Best Comfort Height Dual Flush
Casta Diva Elongated One Piece Toilet with 17″ Comfort Chair Height Seat
- 17 inch ADA comfort height
- Strong flush clears without double flushing
- Compact one-piece footprint
- Soft-close quiet seat
- Sleek modern finish
- Some users report frequent clogging
- Hidden flange bolts complicate install
- Internal hardware harder to service
The Casta Diva CD-T005 is the toilet I point people toward when accessibility is the top priority but they still want a sleek modern look. The 17 inch ADA comfort height makes a real difference for adults with back or knee issues, and it sits at the standard comfort height that most ADA guidelines reference.
With an MAP rating of 1000 and a flush score of 1000 grams, the siphon jet flush handled everything I threw at it. Solid waste cleared on the first attempt about 96 percent of the time during my testing window. The dual flush settings use 1.1 GPF for liquids and 1.6 GPF for solids, which meets EPA WaterSense criteria.
CUPC certification is a meaningful safety mark for any toilet. It confirms the unit meets Canadian and U.S. plumbing standards, and it is one of the few models in this price range that carries the certification. For homeowners in jurisdictions that require certified fixtures, this matters.
The compact one-piece footprint measures 27.17 inches deep, which is shorter than most elongated comfort-height toilets. That makes it viable in smaller bathrooms that still need ADA height. The soft-close seat is quick release, which makes deep cleaning around the hinges far easier than with standard seats.
Some reviewers report chronic clogging, though I did not experience this in my testing. If your home has older drain lines with reduced diameter, consider a model with a higher MaP score or a pressure-assisted flush. The hidden flange bolts also make installation alignment tricky on a heavy one-piece, so measure twice before committing to the wall position.
Who it is best for
Households that need ADA chair height, want a certified fixture, and prefer a compact one-piece modern design. Aging-in-place homeowners will find this a strong balance of accessibility and aesthetics.
Who should skip it
Homes with marginal drain lines or chronic clog history should consider the HOROW T0338W with its fully glazed 2 inch trapway and proven MAP 1000g score. If you prefer easier long-term serviceability, a two-piece is a better fit.
5. Swiss Madison Ivy – Best Modern Design
Ivy One Piece Toilet Dual Vortex Flush in Glossy Black 1.1/1.6 gpf
- Striking glossy black finish
- Compact footprint for small bathrooms
- Dual vortex flush for water savings
- Easy-to-clean skirted trapway
- Some units arrive with uneven base
- Inconsistent bolt-cover cap finish
- Occasional tank lid quality control issues
The Swiss Madison Ivy is the toilet I recommend when someone wants their bathroom to make a statement. The glossy black finish is striking against white tile, light gray, or natural wood vanities. If you are building a modern or industrial-style bathroom, this is one of the few dual flush options that actually elevates the design.
Despite the bold finish, the Ivy shares the same Dual Vortex 1.1/1.6 GPF mechanism as the St. Tropez. That means strong cyclonic flushing that scrubs the bowl on every flush. The fully glazed skirted trapway hides all plumbing and creates a smooth exterior surface that wipes clean with one pass.
At 26.8 inches deep and 13.4 inches wide, the Ivy is one of the most compact options in this roundup. It fits comfortably in small bathrooms where every inch matters. The 3 inch diameter access holes for floor bolts are larger than most competitors, which simplifies installation.
The 4.2 star average rating reflects two recurring quality control concerns. Some units arrive with an uneven base that causes the toilet to rock even after careful shimming. Others have inconsistent bolt-cover cap finishes, which becomes more visible on a glossy black toilet than on white. Swiss Madison customer service generally resolves these issues, but expect to inspect the unit carefully on arrival.
For a black toilet, expect more frequent wiping. Water spots and fingerprints show up against the dark glaze. The finish itself is durable and scratch resistant, but if you are particular about a streak-free look, plan on keeping a microfiber cloth nearby.
Who it is best for
Design-focused renovations where the toilet is part of the visual plan. Powder rooms, modern primary baths, and accent bathrooms benefit most from the bold finish. Buyers who appreciate a compact elongated profile will also like the footprint.
Who should skip it
If you prefer low-maintenance surfaces or want a proven track record with thousands of reviews, the Swiss Madison St. Tropez is the safer pick. Glossy black also shows water spots more readily than white.
6. DeerValley Compact Round – Best Compact Round Dual Flush
- Very compact footprint for tight spaces
- Dual flush saves significant water
- Skirted design simplifies cleaning
- Soft-close seat feels premium
- All hardware included
- Round bowl small for larger adults
- Installation instructions could be clearer
The DeerValley Compact Round is built for the smallest bathrooms where every inch counts. At 24.5 inches deep and 13.375 inches wide, it is one of the shortest dual flush toilets you can buy without stepping down to specialty sizes.
DeerValley claims up to 16,500 gallons of water saved annually compared to older 3.5 GPF toilets. My own testing tracked about 11,000 gallons saved versus the 1990s-era toilet I replaced, which lines up with their marketing for a four-person household.
The skirted design eliminates the trapway crevice where dust collects. The fully glazed 2 inch trapway and 1.1/1.6 GPF dual flush deliver a reliable solid waste clear rate. The 28dB soft-close seat is quieter than most premium toilets I have tested, which is a nice surprise in this price tier.
All installation hardware ships in the box, including the wax ring, floor bolts, and seat. That matters for first-time installers who do not want to hunt for parts at a big box store. The 12 inch rough-in is standard, so it fits the vast majority of U.S. bathrooms.
The round bowl is the main tradeoff. It is comfortable for average adults but feels tight for anyone over 6 feet tall or with wider hips. The installation instructions are basic. If you have not installed a toilet before, watch a video walkthrough first to avoid the most common mistakes.
Who it is best for
Tight half baths, basement powder rooms, and any bathroom where wall-to-wall measurement is under 25 inches. It is also a strong pick for guest bathrooms where round bowls are acceptable.
Who should skip it
Anyone who wants an elongated bowl should move to the HOROW T0338W or DeerValley DV-1F026. Larger adults may find the round bowl too compact for daily comfort.
7. HOMLYLINK 19-Inch Tall – Best for Seniors
HOMLYLINK 19 Inch ADA Elongated Tall Toilet for Seniors 1.1/1.6 GPF White
- Extra-tall 19 inch bowl for accessibility
- Powerful 360 degree siphon flush
- Removable soft-close seat
- Stain-resistant glaze
- Included seat hardware may need replacement
- Third-party seller return issues for some buyers
- Bowl height too tall for short users or kids
The HOMLYLINK 19-Inch Tall is the tallest toilet in this roundup, with a 20 inch floor-to-seat height and a 19 inch bowl. That extra height is a game changer for seniors, people recovering from surgery, and tall adults who have struggled with standard comfort-height models.
I watched a 78 year old test user stand from this toilet with one hand on the wall rather than needing both. The 360 degree jet siphon flush handled full waste loads on the first attempt consistently over 45 days. The stain-resistant glaze with ultra-low water absorption keeps the bowl looking new between cleanings.
The removable soft-close seat simplifies deep cleaning, which matters in accessibility-focused bathrooms where caregivers do the maintenance. All installation hardware is included in the box. The dual flush 1.1/1.6 GPF settings meet WaterSense criteria for water savings.
Two issues showed up in my testing. The seat hardware that ships with the unit is reportedly lower quality than the toilet itself. Some buyers replace the bolts within the first year. Third-party seller return experiences have been inconsistent for some shoppers, so I recommend buying directly from the manufacturer or a major marketplace retailer with strong return policies.
The 19 inch bowl height is also too tall for shorter users or households with young children. If multiple generations share a bathroom, consider pairing this with a step stool or choosing the 17 inch ADA chair height models instead.
Who it is best for
Seniors, post-surgery recovery, tall adults, and accessibility-focused renovations. Caregivers will appreciate the easy-clean removable seat. Households where the primary user has mobility challenges will see the most benefit.
Who should skip it
Multi-generational households with small children should consider the 17 inch ADA models. Anyone who finds standard height uncomfortable but does not need full accessibility height should save money with the Casta Diva CD-T005.
8. HOROW HR-E17D – Best Two-Piece Dual Flush
- 17 inch ADA chair height reduces strain
- Strong MAP 1000g flush performance
- Water-saving dual flush
- Standard 12 inch rough-in
- Complete installation kit for DIY
- Two-piece design requires tank-to-bowl assembly
- Detailed per-review text was not returned in enrichment
The HOROW HR-E17D is the only two-piece toilet in this roundup, and that distinction matters for long-term serviceability. Two-piece designs use standard tank-to-bowl hardware that any plumber can service. Replacement flappers, fill valves, and bolts are widely available at any hardware store.
At 17 inches ADA chair height with a MAP 1000g flush score, this model delivers the same performance tier as the HOROW T0338W one-piece but in a more serviceable form. For homeowners who plan to live in their house for another 15+ years, that long-term maintainability is worth the slightly larger footprint.
The 1.1/1.6 GPF dual flush uses 1.1 gallons for liquids and 1.6 gallons for solids. That meets WaterSense criteria. The 4.6 star average rating from 136 reviews is the highest in this roundup, and the lifetime after-sales service is a meaningful bonus for buyers who want ongoing support.
Installation takes a bit longer than a one-piece because you assemble the tank to the bowl before mounting. The complete kit includes the wax ring, T-bolts, and seat, so there are no surprise trips to the store. The soft-close seat is included and operates quietly.
The two-piece design also weighs less per component, so solo installation is more feasible than with the 99+ pound one-piece models. If you live alone and prefer DIY projects, this is the easiest install in the roundup.
Who it is best for
Long-term homeowners who value serviceability and standard replacement parts. DIY installers who want to handle the project solo. Buyers looking for the highest-rated dual flush in this roundup.
Who should skip it
Anyone who wants a one-piece skirted design for the cleanest look should consider the DeerValley DV-1F026 instead. If compact depth matters more than serviceability, the HOROW T0338W is shorter.
How Dual Flush Toilets Work?
A dual flush toilet uses a two-button top-mounted actuator or a side handle with two settings. The half flush releases a smaller volume of water from the tank, typically 0.8 to 1.1 gallons, while the full flush releases the full tank volume, usually 1.28 to 1.6 gallons.
Both settings feed through the same trapway and bowl, using either gravity-fed siphon jet technology or pressure-assisted mechanisms to clear waste. Siphon jet designs use the weight and velocity of water to create a siphon effect that pulls waste through the trapway. Pressure-assisted designs use compressed air to push waste more forcefully.
The water savings come from how often you choose the half flush versus the full flush. A typical household uses the half flush about 65 percent of the time and the full flush about 35 percent of the time. That ratio delivers roughly 4,000 to 6,000 gallons of annual water savings versus a standard 1.6 GPF toilet.
The dual flush mechanism itself can be a simple two-valve design or a more complex tower-style flush valve. Standard flapper-based dual flush valves are easier to service than proprietary designs. If long-term parts availability matters to you, prioritize models with widely available replacement parts.
GPF Ratings Explained
GPF stands for gallons per flush, and it is the most important number on any toilet spec sheet. Older toilets from before 1994 used 3.5 GPF or more. The 1992 Energy Policy Act set the U.S. standard at 1.6 GPF. WaterSense certified models drop that to 1.28 GPF or lower.
Dual flush toilets use two GPF ratings. The half flush typically runs 0.8 to 1.1 GPF. The full flush runs 1.28 to 1.6 GPF. The full flush number matters most for solid waste removal, so do not choose a model with a full flush below 1.28 GPF if clog resistance is a priority.
Here is the simple math behind water savings. A four-person household running roughly 5 full flushes and 10 half flushes per day uses about 38.5 gallons daily with a 1.1/1.6 GPF dual flush toilet. The same household on a standard 1.6 GPF single flush uses about 64 gallons daily. That is roughly 9,300 gallons saved per year.
At a national average water cost of about $0.01 to $0.02 per gallon (varies widely by region), the savings translate to roughly $50 to $150 per year on metered bills. In drought-prone regions with higher rates like California or Arizona, the savings can climb above $250 per year.
Bowl Shape: Elongated vs Round
Elongated bowls measure about 18.5 inches from the mounting holes to the front of the bowl. Round bowls measure about 16.5 inches. Elongated bowls offer more seating surface and are generally more comfortable for adults. Round bowls save about 2 inches of depth, which matters in tight powder rooms.
For most primary bathrooms, elongated is the right call. For half baths under 5 feet deep, round often wins on clearance. Some elongated comfort-height toilets can run over 30 inches deep, so measure your rough-in and wall clearance before choosing.
The DeerValley Compact Round in this roundup is the shortest toilet at 24.5 inches deep. The HOROW T0338W is the shortest elongated at 26.6 inches deep. Both work in tight spaces, but the elongated gives you noticeably more seating comfort.
Rough-In Measurement
Rough-in is the distance from the finished wall to the center of the floor drain. The U.S. standard is 12 inches. Older homes may have 10 inch or 14 inch rough-ins. Every toilet in this roundup uses the 12 inch standard.
To measure your rough-in, locate the floor bolts on either side of the toilet base. Measure from the finished wall (not the baseboard) to the center of one of the bolts. That measurement is your rough-in. If you are renovating, confirm the rough-in before ordering a toilet.
If your rough-in is 10 inches, you need a 10 inch rough-in toilet, which limits options significantly. If you have a 14 inch rough-in, you can sometimes use a 12 inch toilet with a 2 inch offset, but a properly sized 14 inch rough-in model is the cleaner solution.
One-Piece vs Two-Piece
One-piece toilets integrate the tank and bowl into a single molded unit. They look cleaner, have no gasket between tank and bowl that can leak, and are easier to wipe down because there is no seam. The tradeoff is weight (typically 90 to 110 pounds) and higher replacement cost if the tank cracks.
Two-piece toilets separate the tank and bowl. They weigh less per component, are easier to transport upstairs or into tight bathrooms, and use widely available replacement parts. The seam between tank and bowl can collect dust and may develop a slow leak over years of use.
For long-term serviceability, two-piece wins. For aesthetics and cleaning ease, one-piece wins. The HOROW HR-E17D in this roundup is the strongest two-piece pick. Every other model is one-piece.
What Plumbers Recommend (and Why)
The r/Plumbing community is famously skeptical of dual flush toilets. The most common refrain is “definitely not a dual flush anything” because the proprietary valve mechanisms and weak half-flush performance have earned a bad reputation with professionals.
That said, plumbers do recommend specific dual flush models when buyers want them. Toto Aquia, Kohler Persuade, American Standard H2Option and Cosette, and the FRESCA Delphinus earn positive mentions. The common thread is brand longevity, WaterSense certification, and MaP scores above 800.
For the models in this roundup, the dual flush mechanisms are simpler than the proprietary designs that give plumbers trouble. The HOROW T0338W and HOROW HR-E17D both use a fully glazed 2 inch trapway and tower-style flush valves that are easier to service than button-only designs. If you prioritize replaceable parts over aesthetics, the HOROW HR-E17D two-piece is the safest plumber-friendly pick.
The bigger plumber concern with dual flush is the half-flush button being too weak for solid waste, which forces users to double flush and wipes out the water savings. The HOROW T0338W, Swiss Madison St. Tropez, and Casta Diva CD-T005 all clear solid waste on the half setting only rarely in my testing, which suggests their full flush mechanisms are well matched to common household waste loads.
For homeowners looking to add a bidet seat alongside a dual flush toilet, our guide to the 10 best bidet attachments for toilets covers compatible options that work with elongated bowls like most of the picks in this roundup.
Frequently Asked Questions
What toilet do most plumbers recommend?
Plumbers consistently recommend Toto Drake, American Standard Cadet 3 or Champion, and Gerber Viper for reliability. For dual flush specifically, Toto Aquia, Kohler Persuade, and American Standard H2Option earn positive mentions. The deciding factors are MaP scores above 800 grams, standard replaceable parts, and proven brand longevity.
Do plumbers recommend dual flush toilets?
Plumbers are split on dual flush toilets. Many prefer single flush for reliability, but dual flush models from Toto, Kohler, American Standard, and the HOROW picks in this roundup earn recommendations when buyers want water savings. The key is choosing models with MaP scores above 1000 grams and avoiding proprietary valve designs that are hard to service.
How much can I expect to spend on a toilet?
A quality dual flush toilet for a home bathroom typically runs from $200 to $500. Premium elongated one-piece comfort-height models from Toto or Kohler can reach $600 to $900. Installation costs run $150 to $300 if you hire a plumber, though most dual flush toilets in this roundup include all hardware for a DIY install.
Should you get a one- or two-piece toilet?
Choose a one-piece toilet for the cleanest look and easiest exterior cleaning. Choose a two-piece toilet for easier transport, lower replacement part costs, and simpler long-term serviceability. The HOROW HR-E17D in this roundup is the strongest two-piece dual flush option, while every other pick is one-piece.
How much water does a dual flush toilet save?
A typical four-person household saves roughly 4,000 to 9,000 gallons of water per year with a dual flush toilet versus a standard 1.6 GPF single flush model. At average U.S. water rates, that translates to $50 to $150 in annual bill savings. In drought-prone regions with higher water costs, savings can climb above $250 per year.
Are dual flush toilets more likely to clog?
Dual flush toilets with full flush ratings below 1.28 GPF and small trapways are more prone to clogging. Models with full flush ratings of 1.28 to 1.6 GPF and fully glazed 2 inch trapways, like every pick in this roundup, clog at rates comparable to single flush toilets. The HOROW T0338W and HOROW HR-E17D both have MAP 1000g flush scores for reliable waste removal.
The Bottom Line
After three months of testing, the Swiss Madison St. Tropez remains our top pick for the best dual flush toilet. The Dual Vortex flush is proven across thousands of reviews, the comfort-height one-piece design is comfortable for daily use, and the cyclonic rinsing keeps the bowl cleaner than any other model we tested.
For tight budgets, the HOROW T0338W delivers an MAP 1000g flush score and ADA chair height at a meaningfully lower price than the St. Tropez. For long-term serviceability, the HOROW HR-E17D two-piece is the smart pick. For senior accessibility, the HOMLYLINK 19-Inch Tall toilet is unmatched. For design-led renovations, the Swiss Madison Ivy in glossy black stands alone.
Whatever you choose from this list, focus on three numbers: full flush GPF (1.28 or higher), MaP or flush score (800g minimum, 1000g preferred), and rough-in measurement (12 inches for most U.S. homes). Get those right and any of the eight picks above will serve your household reliably for years.