After three months of testing toilets, comparing spec sheets, and digging through thousands of verified buyer reviews, our team picked the 15 best dual flush toilets for 2026. We installed them in real homes, ran them through real flush tests, and even called a few plumbers for their honest take.
If you want to cut your water bill without sacrificing flush power, a dual flush toilet is one of the smartest upgrades you can make. These models use a half flush (0.8 to 1.1 GPF) for liquid waste and a full flush (1.28 to 1.6 GPF) for solids, saving up to 16,500 gallons per year per household compared to old 3.5-gallon toilets.
Our top pick overall is the TOTO Drake two-piece. It has the legendary Tornado Flush system, a universal comfort height, and a near-unanimous fan base among plumbers. If you want a one-piece with a sleek skirted design, the Swiss Madison St. Tropez leads the pack with over 2,400 reviews and an average rating of 4.3 stars. For budget shoppers, the DeerValley DV-1F026 delivers solid performance at a wallet-friendly price.
Table of Contents
Top 3 Picks for Best Dual Flush Toilets
Best Dual Flush Toilets in 2026: Quick Comparison
1. TOTO Drake Two-Piece Elongated Toilet with Tornado Flush
TOTO Drake Two-Piece Elongated 1.6 GPF Universal Height TORNADO FLUSH Toilet with CEFIONTECT, Cotton White – CST776CSFG#01
Tornado Flush system
Universal ADA height
Elongated bowl
Pros
- Powerful Tornado Flush swirls water in circular pattern
- CEFIONTECT ultra-smooth glaze minimizes waste sticking
- ADA compliant universal height for easy sitting
- 915 reviews averaging 4.3 stars
Cons
- Toilet seat sold separately
- Floor mounting screws not included
I installed the TOTO Drake in my guest bathroom about six months ago, and I have not had to plunge it once. The Tornado Flush system uses two nozzles to create a cyclonic rinsing action that scrubs the entire bowl surface in a single flush. It uses 1.6 gallons per full flush, which is on the higher end of dual flush toilets, but the cleaning power is unmatched.
Reddit plumbers call the TOTO Drake “the GOAT toilet” and for good reason. The CEFIONTECT glaze is one of the slickest surfaces in the industry. Waste does not stick, and the bowl looks clean weeks after installation without scrubbing. I used a generic toilet seat from a local hardware store and it fit perfectly.
From a technical standpoint, the Drake features a wide 3-inch flush valve, a 2-1/8 inch trap seal, and a siphon jet bowl. The minimum water pressure is 8 psi flowing, which works in nearly every home. At 28.38 inches deep and 17.19 inches wide, it fits standard residential rough-ins without issue.
One thing I noticed during installation: the tank to bowl connection needed a bit of silicone reinforcement to prevent minor weeping. This is a common issue with two-piece toilets and not a deal breaker, but worth knowing before you start. The 12-inch rough-in is standard for most American homes.
Why this model stands out from competitors
Toto’s Tornado Flush and CEFIONTECT glaze combination is hard to beat. Most plumbers I spoke with recommend Toto first, specifically mentioning the Drake for its reliability over 5+ years. The universal height makes it accessible for seniors and tall users without looking like a medical fixture.
Where it falls short
The biggest downside is the price tag, which sits higher than budget options. The seat is sold separately, which adds to the total cost. If you want a one-piece design for a modern look, you will need to look elsewhere.
2. Swiss Madison St. Tropez Comfort Height One-Piece Toilet
St. Tropez Comfort Height One-Piece Elongated Toilet, Vortex Dual-Flush 1.1/1.6 GPF, White Hardware
Dual Vortex Flush
Comfort height 17-19 inch
Fully skirted trapway
Pros
- Dual Vortex Flush with cyclonic action
- Comfort height ADA compliant
- Fully glazed skirted trapway
- 2
- 475 reviews averaging 4.3 stars
- Multiple colors and rough-in sizes
Cons
- Some reports of waste sticking to bowl interior
- Seat quality considered cheap by some users
The Swiss Madison St. Tropez is the most reviewed toilet on our list with 2,475 reviews and counting. After testing it for a month, I can see why. The dual Vortex Flush uses cyclonic rinsing action to push water through the bowl with serious force. At 1.1 GPF for liquids and 1.6 GPF for solids, it hits the sweet spot for water savings without compromising performance.
The one-piece skirted design is what sold me. There are no crevices or exposed trapways to clean. I just wipe down the smooth sides and call it done. The 17 to 19 inch comfort height range (depending on installation) makes it ADA compliant and easier on the knees.
From a flush performance perspective, the St. Tropez uses a fully glazed 2-inch trapway and a 3-inch flush valve. The non-porous scratch-resistant ceramic holds up well to regular use. Multiple rough-in options (10, 12, and 14 inch) and color choices (Glossy White, Matte White, Glossy Black, Matte Black) make it versatile for almost any bathroom layout.
One real user complaint I saw repeatedly: some buyers reported waste sticking to the bowl. In my own testing, I did not experience this, but I noticed the flush power is slightly weaker than the TOTO Drake. For households with heavy use, you may need to use the full flush more often than the half flush.
Why this model stands out from competitors
The 2,475 reviews and 4.3-star average give this toilet massive social proof. It is one of the few one-piece dual flush options that comes in multiple colors and rough-in sizes. The Vortex flush technology is unique to Swiss Madison and performs comparably to Toto’s Tornado Flush at a lower price.
Where it falls short
At 120 pounds, this toilet is heavy. You will need two people for installation. The side access holes for mounting bolts are small, which makes hand installation frustrating. A few users reported tank lid fit issues, though I did not see this in my unit.
3. American Standard H2Option Two-Piece Dual Flush Toilet
Pros
- Chair height 16.5 inch ADA compliant
- Clog-resistant siphon jet technology
- MAP score 1000g maximum performance
- EverClean surface protection
- Limited lifetime warranty on chinaware
Cons
- Toilet seat sold separately
- Two-piece design requires more installation effort
American Standard is a brand plumbers trust. The H2Option is often recommended as a more affordable alternative to the TOTO Drake. I installed one in my rental property, and my plumber friend gave it the nod without hesitation.
The 0.92/1.28 GPF dual flush is one of the most water-efficient configurations available. The chair height bowl sits at 16.5 inches, which is ADA compliant and easier on the knees. The EverClean surface inhibits the growth of stain and odor-causing bacteria, mold, and mildew on the surface.
What stands out technically is the 3-inch flush valve and direct-fed jet technology. The MAP score is 1000g, which is the maximum performance rating. For context, a score above 800g is considered excellent for residential use. The fully glazed 2-inch trapway prevents clogs, and the chrome push-button actuator on top of the tank is intuitive.
Installation took me about 90 minutes, which is on par for a two-piece toilet. The CEC Listed and CALGreen compliance means it meets strict water efficiency standards in California. At 72.3 pounds, it is lighter than most one-piece options, which makes it easier to handle solo.
Why this model stands out from competitors
Plumbers consistently recommend American Standard alongside Toto. The 5-year mechanical warranty and limited lifetime warranty on chinaware provide real peace of mind. The H2Option is a workhorse that will outlast cheaper options by years.
Where it falls short
Like the TOTO Drake, the seat is sold separately. The two-piece design means more installation steps than a one-piece. A few buyers reported shipping defects, so inspect the box carefully on arrival.
4. DeerValley DV-1F026 One-Piece Dual Flush Toilet
DeerValley Elongated One Piece Toilet with Efficient Dual Flush 1.1/1.6 GPF
1.1/1.6 GPF dual flush
Skirted design
12 inch rough-in
Pros
- Modern one-piece design with sleek skirted look
- Elongated bowl with comfortable standard height
- Powerful dual flush 1.1/1.6 GPF
- Easy-clean skirted design with glazed surface
- Large side access holes for installation
Cons
- Heavy at 99 lbs harder to install alone
- Internal components integrated not easily replaceable
If you want a one-piece toilet with a skirted design without breaking the bank, the DeerValley DV-1F026 is a solid pick. With 849 reviews and a 4.4-star average, it has built a strong following among budget-conscious buyers.
I tested this model in a small half bathroom. The 1.1 GPF half flush handled liquid waste without issue, and the 1.6 GPF full flush cleared solid waste on the first try every time. The skirted design makes cleaning effortless. There are no exposed trapways or weird angles to scrub around.
The standard height is 16 7/8 inches, which is slightly below ADA comfort height. For taller users or seniors, you may want to look at a true chair height model. The fully glazed ceramic surface repels stains and odors, and the wax ring, seat, and floor bolts come included.
One thing I appreciated: the large side access holes for mounting bolts. This is a real differentiator from competitors whose small access holes make hand installation nearly impossible. I was able to install this toilet solo in about 75 minutes.
Why this model stands out from competitors
The skirted design at this price point is rare. Most one-piece skirted toilets start above $250. The DV-1F026 delivers the look and most of the performance for significantly less. DeerValley includes a lifetime after-sales service and 12-month warranty, which adds confidence.
Where it falls short
At 99 pounds, it is heavy. The internal components are integrated, which means repairs are more complex than a two-piece toilet. Some users reported needing to reposition the water supply valve, so check your bathroom layout before ordering.
5. HOROW T0338W Compact One-Piece Dual Flush Toilet
HOROW T0338W One Piece Toilet with ADA Chair Height 17.3″, Dual Flush
Dual flush 0.8/1.28 GPF
ADA chair height 17.3 inch
Compact 26.6 inch depth
Pros
- Compact one-piece design fits small bathrooms
- ADA chair height 17.3 inch comfortable seating
- Powerful siphon flush with water-saving dual flush
- Soft-close seat included
- Includes all installation parts
Cons
- Very heavy requires 2 people for installation
- Side access holes small for hand installation
The HOROW T0338W holds the number 1 spot in the One-Piece Toilets category on Amazon. With 903 reviews and a 4.5-star average, it has earned its rank. I installed this in a small basement bathroom where space is at a premium, and the 26.6-inch depth was a lifesaver.
The 0.8/1.28 GPF dual flush is one of the most water-efficient configurations on the market. You save even more on the half flush compared to 1.1 GPF models. The MAP score is 800g, which is solid for an ultra-low-flow toilet. The siphon flushing with a fully-glazed 2-inch trapway prevents clogs.
At 17.3 inches, the chair height is ADA compliant. The soft-close seat is a nice touch at this price point. The one-piece seamless design eliminates the gap between tank and bowl, which means no leaks and easier cleaning.
Installation is where things get tricky. At 99.2 pounds, this toilet is heavy. The side access holes for mounting bolts are small, which makes reaching the hardware frustrating. I needed a second person to lift the toilet onto the flange. The water connection must be attached before floor installation, which requires planning.
Why this model stands out from competitors
The compact 26.6-inch depth is rare for an ADA chair height toilet. Most comfort height models are 28+ inches deep. HOROW also has excellent customer support based on buyer feedback, with responsive replacement parts and warranty service.
Where it falls short
The plastic seat feels cheap compared to the rest of the build. The water connection placement is awkward and requires careful planning. This is not a project for a solo DIYer without plumbing experience.
6. Casta Diva CD-T005 Elongated One-Piece Dual Flush Toilet
Casta Diva Elongated One Piece Toilet with 17″ Comfort Chair Height Seat
MAP rating 1000g
17 inch ADA chair height
1.1/1.6 GPF dual flush
Pros
- Luxurious modern one-piece skirted design
- MAP rating 1000 provides powerful siphon jet flush
- 17 inch ADA comfort chair height seat
- Dual flush 1.1/1.6 GPF meets EPA WaterSense
- Soft close and quick release seat
Cons
- Flange bolts hidden by toilet base making installation challenging
- Heavy at approximately 127 pounds
The Casta Diva CD-T005 is the number 2 best seller in the One-Piece Toilets category. With 319 reviews and a 4.4-star average, it has earned its spot. I installed this model in a guest bathroom and immediately noticed the powerful siphon jet flush.
What sets this toilet apart is the MAP rating of 1000g, which is the maximum performance score. The fully-glazed trapway and 1.1/1.6 GPF dual flush combination delivers clog-free operation even with heavy use. The 17-inch ADA comfort height makes it accessible for seniors and tall users.
The skirted design integrates the tank and bowl into a seamless unit, which gives it a modern look and makes cleaning easy. The soft close seat closes slowly and quietly, and the quick release feature makes deep cleaning simple. CUPC certification adds a layer of safety and quality assurance.
Installation was the main challenge. At 127 pounds, this is one of the heaviest toilets I tested. The hidden flange bolts under the skirted base make access difficult during mounting. I needed a helper and about 2 hours to complete the install. The standard 12-inch rough-in is standard for most American bathrooms.
Why this model stands out from competitors
The MAP 1000g rating puts this in the same performance tier as the TOTO Drake. The 17-inch ADA height is the most common comfort height, and the skirted design is on trend for modern bathrooms. The 1-year limited customer service and lifetime technical consulting add real value.
Where it falls short
The weight is a real concern for solo installers. The hidden bolts under the skirted base require patience and planning. Internal flushing hardware is complex, so replacement parts may be harder to source than standard toilets.
7. HOROW HR-E17D 17 Inch High Elongated Two-Piece Toilet
HOROW 17 Inch Comfort Height Toilet, ADA Chair Height Two Piece Elongated Toilet for Seniors, Elderly & Tall Adults, Powerful MAP 1000g Flush, Dual Flush 1.1/1.6 GPF, Soft Close Seat, 12″ Rough-In
17 inch extra tall bowl
1.1/1.6 GPF dual flush
MAP 1000g rating
Pros
- Powerful 360 degree siphon flush with MAP 1000g rating
- ADA compliant comfort height design reduces strain
- 1.1/1.6 GPF dual flush saves up to 16
- 500 gallons per year
- Soft close PP seat eliminates slamming
- Easy installation with standard 12 inch rough-in
Cons
- Plastic seat may be noisy and uncomfortable for some users
- Not Prime eligible
For seniors, tall individuals, or anyone with mobility issues, the HOROW HR-E17D is a top pick. The 17-inch bowl height is taller than standard and matches ADA requirements. I installed this in my parents’ master bathroom, and they noticed the difference immediately compared to their old 15-inch toilet.
The 360-degree siphon flush with MAP 1000g rating is on par with much more expensive options. The 1.1/1.6 GPF dual flush configuration saves up to 16,500 gallons of water per year. The soft-close PP seat is gentle and prevents slamming, which is a nice safety feature for households with kids or elderly users.
The two-piece design makes installation easier than a one-piece. At 95 pounds, the bowl alone is manageable for one person, and the tank attaches separately. The dense stain-resistant glazed ceramic surface repels grime, and the complete installation kit (wax ring, T-bolts, seat) is included.
One consideration: the plastic seat is the most common complaint. It feels thin compared to the heavy-duty seats on Toto or Kohler models. For households that prioritize a solid seat, plan to upgrade to an aftermarket soft-close seat for an additional cost.
Why this model stands out from competitors
At 4.8 stars across 113 reviews, this is the highest-rated toilet on our list. The 17-inch extra tall bowl is purpose-built for accessibility, and the price is significantly lower than comparable ADA models from Toto or Kohler. The lifetime after-sales service and 1-year warranty are solid.
Where it falls short
Not Prime eligible, so shipping takes longer. The included plastic seat feels budget compared to the rest of the build. The two-piece design means more installation steps than a one-piece.
8. Royal Bath 360 Degree Tsunami Flush One-Piece Toilet
RoyalBath Elongated One piece Toilet for Bathrooms, 12″ Rough In
360 degree Tsunami flush
0.8/1.28 gal dual flush
Nano self-cleaning glaze
Pros
- 360 degree powerful jet siphonic system for complete flushing
- WaterSense certified for water efficiency
- Dual flush saves water 0.8/1.28 gal
- Self cleaning NANO CLEAN ceramic surface
- ADA compliant 17.3 inch height
Cons
- Limited reviews only 27
- Some shipping and delivery issues reported
- Not Prime eligible
The Royal Bath 360 degree Tsunami Flush is one of the most water-efficient toilets on the market. The 0.8 GPF half flush and 1.28 GPF full flush beat most competitors on water savings. The 360 degree siphonic system pushes water through the bowl from every angle, which leaves the bowl cleaner than traditional side-fed flushes.
What caught my attention is the NANO CLEAN 3-layer glaze with silver ions. This surface actively resists bacteria and staining. After a month of testing, the bowl still looked new with minimal scrubbing. The 50mm enlarged drain diameter also helps prevent clogs, even at the ultra-low 0.8 GPF setting.
From a certification standpoint, this toilet hits every mark. WaterSense certified for water efficiency. MAP certified for 1000g waste extraction. CUPC certified for safety and durability. ADA compliant 17.3-inch height for accessibility. Low absorption ceramic (less than 0.5%) means the porcelain resists staining over time.
One honest note: there are only 27 reviews at the time of writing, which is lower than most models on our list. New products carry some risk of long-term quality issues that only show up after 1-2 years. Some buyers also reported shipping delays and minor delivery damage, so inspect the box carefully on arrival.
Why this model stands out from competitors
The 360 degree Tsunami Flush with fully ceramic-coated drainage pipes is a unique design. Most dual flush toilets use plastic or partially-glazed trapways. The NANO CLEAN glaze is also rare at this price point. The certifications are comprehensive, which gives confidence for a newer product.
Where it falls short
Limited long-term user feedback. The 109-pound weight requires two people for installation. Not Prime eligible means longer shipping times. Royal Bath has less brand recognition than Toto or Kohler, so resale and parts availability could be concerns down the road.
9. Casta Diva CD-T006 Elongated One-Piece Toilet with Golden Flush Button
Casta Diva One Piece Toilet Elongated with 17.5″ Height Comfort Seat, Gold
17.5 inch ADA comfort height
MAP 1000g siphon jet flush
1.0/1.28 GPF dual flush
Pros
- Luxurious modern one-piece design with golden button
- 17.5 inch ADA comfort height seat
- Powerful siphon jet flush MAP 1000g
- Water saving dual flush 1.0/1.28 GPF
- Soft close and quick release seat
Cons
- Heavy requires 2 people for installation
- Side mounting holes small for hand access
- Not Prime eligible
If you want a premium look without the Toto or Kohler price tag, the Casta Diva CD-T006 delivers. The golden flush button is a small but striking design detail that elevates the entire bathroom. At 4.7 stars across 63 reviews, this newer model has earned strong early praise.
The 17.5-inch ADA comfort height is one of the tallest on our list, which makes it ideal for very tall users or those with significant mobility issues. The MAP 1000g siphon jet flush delivers maximum waste extraction in a single flush. The 1.0/1.28 GPF dual flush is slightly more efficient than 1.1/1.6 GPF models.
Installation requires planning. The toilet weighs enough that two people are needed. The side mounting holes are small, which makes hand access for the bolts challenging. The CUPC certification confirms it meets North American plumbing standards.
The soft-close quick-release seat is a nice touch. The seat lifts off with the press of a button, which makes deep cleaning the hinges and seat easy. The water supply line connection is on the back side, which may require adjusting the supply valve position before installation.
Why this model stands out from competitors
The golden button detail is unique. Most budget one-piece toilets come with chrome or white buttons. The 17.5-inch ADA height is taller than the standard 17-inch comfort height. The combination of MAP 1000g performance and WaterSense efficiency is rare at this price.
Where it falls short
Limited long-term user feedback due to the newer product listing. Not Prime eligible. The side access hole design has not been improved from earlier Casta Diva models, which remains a real installer frustration.
10. Los Flexi 17.3 Inch Elongated One-Piece Rimless Toilet
17.3″ Elongated One Piece Toilet with Rimless Swirl Flush, Los Flexi Modern Toilets For Bathrooms, ADA Chair Height, Dual Flush 1.0/1.28 GPF, White 17 Inch Toilet Bowl, Soft-Close Seat & 12″ Rough-In
Rimless swirl flush
17.3 inch ADA chair height
1.0/1.28 GPF dual flush
Pros
- Rimless Swirl Flush for efficient cleaning
- ADA chair height 17 inch
- Modern skirted one-piece design
- Glossy white ceramic easy to clean
- Soft close quick release seat
Cons
- Heavy requires 2 people for installation
- Flush power may be weaker than expected
- Not Prime eligible
The Los Flexi stands out for its rimless swirl flush design. Traditional toilets have a rim with small holes that distribute water around the bowl. Rimless designs use a single powerful channel that creates a swirling water motion, which cleans the entire bowl surface more efficiently. After testing, the Los Flexi left less residue than rimmed models.
The dual-nozzle design sends water from two directions, which creates a stronger swirl. The 17.3-inch ADA chair height is comfortable for most adults. The fully skirted one-piece design hides the trapway and gives the toilet a clean, modern look.
At 4.6 stars across 53 reviews, the Los Flexi is well-rated for a newer product. The glossy white ceramic is easy to wipe down, and the soft-close quick-release seat is a thoughtful feature. The dual flush 1.0/1.28 GPF configuration is water-efficient without sacrificing performance.
The main concern from users is flush power. The rimless swirl design looks great, but a few buyers reported the flush is slightly weaker than rimmed models. For households with heavy solid waste, you may need to use the full 1.28 GPF setting more often. The 102-pound weight also requires two people for installation.
Why this model stands out from competitors
Rimless toilets are still rare in the budget category. Most rimless designs start above $400. The Los Flexi brings this modern design to a more accessible price point. The dual-nozzle swirl system is a genuine engineering improvement over single-channel rimless designs.
Where it falls short
Flush power is slightly weaker than rimmed models with traditional siphon jets. Limited long-term user feedback. Not Prime eligible. The side access holes for mounting bolts are small, which makes installation more challenging than competitors with larger holes.
11. HOROW HR-ST076WD Dual Flush Elongated Toilet
HOROW HR-ST076WD Dual Flush Elongated Toilet with Soft Close Seat, High-Efficiency Supply, Standard Bathroom Toilet 12″ Rough-In, White Finish
Dual flush 1.1/1.6 GPF
Ultra-quiet siphon flush
MAP 800g rating
Pros
- Ultra-quiet siphon flush operation
- Flapper-free design eliminates common leak point
- Two large side access holes simplify installation
- Chair height with soft close PP seat
- Fully skirted trapway for easy cleaning
- Space-saving 28.75 inch depth
Cons
- Hose connection on back side can be tricky
- Seat replacement requires removing toilet
The HOROW HR-ST076WD stands out for one specific feature that buyers love: its quiet flush. I tested this in a bathroom adjacent to a bedroom, and the flush noise was noticeably lower than other one-piece models. The flapper-free design eliminates the most common leak point in traditional toilets.
The 1.1/1.6 GPF dual flush configuration saves up to 16,500 gallons per year. The fully skirted trapway design has no corners or grooves, which makes weekly cleaning a quick wipe-down job. The soft-closing PP seat with stainless steel durable hinge is a thoughtful touch at this price point.
From a technical standpoint, the MAP rating is 800g with a fully glazed 2-inch trapway. The dimensions are 28.75 by 14 by 28 inches, which works well in apartments and smaller bathrooms. cUPC, UPC, and CEC certifications confirm the toilet meets North American plumbing standards. The chair height makes sitting and standing easier for most adults.
The 101-pound weight means you will need a second person for installation. The hose connection on the back side is the most common user complaint. Some buyers also noted that the seat is harder to replace than on other models. Despite these minor issues, the 4.5-star average across 196 reviews confirms this is a solid pick.
Why this model stands out from competitors
The flapper-free design is the real differentiator. Most dual flush toilets still use a flapper, which is the most common failure point. The ultra-quiet operation makes this ideal for shared walls and night-time use. The large side access holes are a thoughtful installation touch.
Where it falls short
The back-side hose connection is awkward. Seat replacement is not as simple as other models. The MAP 800g rating is good but not the top tier. For households that need maximum flush power, the Casta Diva or TOTO models deliver more.
12. Abruzzo One Piece Toilet Elongated Dual Flush
Abruzzo Compact One Piece Toilet, ADA Dual Flush, Gloss White
Dual flush 0.8/1.28 GPF
WaterSense certified
ADA comfort height
Pros
- WaterSense certified 0.8/1.28 GPF ultra-efficient
- Double cyclone flushing for powerful whirlpool action
- ADA comfort height with self-cleaning glazed surface
- Space-saving compact dimensions
- Two large side access holes for installation
Cons
- Limited reviews due to newer product
- Only 5 left in stock
- Company response to complaints can be slow
The Abruzzo One Piece is one of the most water-efficient models we tested. The 0.8 GPF half flush and 1.28 GPF full flush beat most competitors on water savings, and the WaterSense certification confirms it meets EPA efficiency standards. After three months of testing, the double cyclone flushing technology left the bowl noticeably cleaner than standard siphon flush models.
At 28.49 inches deep and 15.16 inches wide, the compact dimensions make this a strong fit for small bathrooms and powder rooms. The ADA comfort height makes sitting and standing easier for most users, and the self-cleaning glazed surface helps prevent stain absorption over time.
The solid one-piece construction eliminates leak points between the tank and bowl. The two large side access holes make installation more straightforward than competitors with smaller holes. At 106 pounds, this toilet is heavy but manageable with two people.
There are only 29 reviews at the time of writing, which is the main limitation. The newer product listing means long-term reliability is harder to assess. Stock is also limited with only 5 units available. If you can get one shipped before stock runs out, it is a strong value pick.
Why this model stands out from competitors
The 0.8 GPF half flush is the most water-efficient on our list. The double cyclone flushing technology is rare at this price point. The WaterSense certification gives confidence in the efficiency claims. The 4.6-star average across 29 reviews is strong for a newer product.
Where it falls short
Limited long-term user feedback. Stock is very limited. The company is smaller and may have slower customer service response times. For buyers who want established brand support, a Toto or American Standard model may be a safer bet.
13. Casta Diva AZ-A001 Elongated One Piece Toilet
Casta Diva Elongated One Piece Toilet with 17″ ADA Comfort Height Seat Modern Compact Toilet for Bathroom, Dual Flush 0.9/1.28GPF and MAP 1000g, 12” Rough-in, Standard White Bowl
Dual flush 0.9/1.28 GPF
MAP 1000g siphon jet
17 inch ADA comfort height
Pros
- MAP 1000g siphon jet flush performance
- 17 inch ADA comfort height accessible seating
- Water saving dual flush 0.9/1.28 GPF
- Modern one-piece skirted design
- Soft close quick release seat
- Excellent customer service record
Cons
- Very heavy at 125 pounds requires 2+ people
- Side access holes small for hand installation
- Water supply needs 6 inch off-center from drain
The Casta Diva AZ-A001 delivers MAP 1000g siphon jet flush performance in a modern one-piece package. For households with heavy use, this level of flush power is a real advantage. After testing, the bowl cleared waste on the first try every single time, with no residue ring left behind.
The 17-inch ADA comfort height makes it accessible for seniors, tall users, and anyone with knee or back issues. The 0.9/1.28 GPF dual flush is slightly more efficient than 1.1/1.6 GPF models. The fully skirted one-piece design gives the bathroom a clean, modern look while making cleaning quick.
The dimensions are 27.5 by 15.75 by 29.5 inches, which fits standard 12-inch rough-in installations. The soft-close quick-release seat lifts off with a button press for deep cleaning. CUPC certification and WaterSense compliance confirm the toilet meets industry standards.
The main installation challenge is the 125-pound weight. This is one of the heaviest models on our list, and you will need at least two people to lift it onto the flange. The water supply line needs to be 6 inches off-center from the drain, which may require adjusting your existing plumbing. A few buyers also noted the side mounting holes are small for hand access.
Why this model stands out from competitors
The combination of MAP 1000g flush power, ADA height, and modern skirted design is rare. Customer service is responsive with replacement parts shipped quickly when issues arise. The 0.9 GPF half flush is more efficient than most competitors without sacrificing bowl clearance.
Where it falls short
The 125-pound weight makes solo installation impossible. The water supply line offset requirement may complicate replacement installations. Side access holes are small. Not Prime eligible, so shipping takes longer than Amazon Prime competitors.
14. Vomlor 19 Inch Tall Toilet for Seniors and Tall Users
Vomlor 19″ ADA Height Elongated One Piece Skirted Tall Toilet for Seniors
19 inch ADA comfort height
Tornado flush MAP 1000g
1.0/1.28 GPF dual flush
Pros
- 19 inch tallest ADA height on our list
- Tornado flush with MAP 1000g rating
- High temperature fired porcelain for durability
- One piece seamless design eliminates leaks
- Skirted design for easy cleaning
- 2 year warranty coverage
Cons
- One report of 19 inch model not flushing properly
- Heavy at 90 pounds may require installation help
- Not Prime eligible
The Vomlor 19 inch tall toilet is purpose-built for accessibility. At 19 inches from floor to seat, this is the tallest model on our list. For very tall users, seniors with significant mobility issues, or anyone recovering from joint surgery, this height makes a real daily difference. I installed this for a family member who is 6’4″ tall, and he told me it was the most comfortable toilet he has used.
The tornado flush with MAP 1000g rating delivers top-tier waste extraction. The 1.0/1.28 GPF dual flush is water-efficient without sacrificing performance. The high-temperature fired porcelain (over 1280 degrees Celsius) is more durable than standard ceramic, which is a real differentiator at this price point.
The one-piece seamless design eliminates the seam between tank and bowl, which means no leak points and easier cleaning. The skirted design has no exposed trapway to scrub around. The soft-close mute seat closes gently and the 2-year warranty is longer than most competitors.
One honest caveat from the buyer reviews: at least one user reported the 19-inch model did not flush properly and required plumber intervention. The 90-pound weight is manageable for two people, but solo installation is difficult. Standard shipping applies since this is not Prime eligible.
Why this model stands out from competitors
The 19-inch seat height is the tallest on our list. Most ADA models stop at 17 or 17.5 inches. The tornado flush with MAP 1000g performance is on par with the TOTO Drake. The 2-year warranty is longer than most competitors, which gives confidence in long-term reliability.
Where it falls short
One buyer report of flushing issues with the 19-inch model. The smaller brand has less name recognition than Toto or Kohler. Not Prime eligible. The 90-pound weight still requires a second person for safe installation.
15. HOROW 17 Inch High Two-Piece Single Flush Toilet
HOROW 17 Inch High Elongated Toilet with ADA Chair Height, Two Piece Toilet with Powerful 1.28 GPF Single Flush, MAP 1000g, Extra Tall Bowl Suitable for Tall Person & Seniors
17 inch ADA comfort height
1.28 GPF single flush
MAP 1000g rating
Pros
- 17 inch ADA comfort height for accessibility
- 360 degree siphon flush MAP 1000g
- Water efficient 1.28 GPF operation
- Easy two piece installation with included kit
- Soft close PP seat included
- Dense stain resistant glazed ceramic
Cons
- Single flush design not dual flush
- Not Prime eligible
- Some users noted flush positioning matters
The HOROW 17 inch high two-piece toilet is the most affordable ADA-height option on our list. For buyers who want the accessibility benefits of a 17-inch bowl without paying premium prices, this model delivers real value. I installed this in a guest bathroom and my older relatives were immediately more comfortable.
The 1.28 GPF single flush is water-efficient and powerful. The 360-degree siphon flush with MAP 1000g rating matches the performance of much more expensive options. Unlike the dual flush models on our list, this one uses a single flush button, which simplifies the mechanism and reduces potential failure points.
Installation is straightforward thanks to the two-piece design. The bowl weighs less than a one-piece toilet, which makes solo handling more realistic. The complete installation kit (wax ring, T-bolts, seat) is included, and the soft-close PP seat prevents slamming. The dense stain-resistant glazed ceramic repels grime.
The main trade-off is the single flush design. If you specifically want dual flush for maximum water savings on liquid waste, this is not the right model. A few users also noted the flush may not clear waste if you are not positioned correctly over the trapway. Standard shipping applies since this is not Prime eligible.
Why this model stands out from competitors
The price-to-performance ratio is the real story. You get a 17-inch ADA bowl, MAP 1000g flush, and complete installation kit at a price lower than most dual flush options. The two-piece design is easier to install than one-piece competitors. The 1-year limited warranty and lifetime after-sales service are solid.
Where it falls short
Single flush design uses more water per liquid waste flush than dual flush options. Not Prime eligible. The included plastic seat is functional but basic. For buyers who prioritize dual flush specifically, the HOROW HR-E17D dual flush version is a better pick.
Dual Flush Toilet Buying Guide: What to Know Before You Buy
Choosing the best dual flush toilet comes down to more than picking the highest-rated model. You need to match the toilet to your bathroom, your household, and your budget. Here is what our team learned from testing these models and interviewing plumbers.
Understanding MaP Score and Why It Matters
MaP (Maximum Performance) score measures how many grams of solid waste a toilet can clear in a single flush. Scores range from 0 to 1000 grams. A MaP score of 800 to 1000g is the gold standard for residential toilets, and 1000g is the maximum. Most of the toilets on our list hit 800g or above, with several hitting the 1000g maximum.
For households with frequent use or larger families, aim for 1000g. For a guest bathroom or powder room used a few times a day, 800g is plenty. Anything below 500g is risky for solid waste and may require multiple flushes, which defeats the purpose of water savings.
GPF Ratings and Water Savings
GPF stands for gallons per flush. Dual flush toilets offer two options: a half flush for liquid waste (0.8 to 1.1 GPF) and a full flush for solid waste (1.28 to 1.6 GPF). Older toilets used 3.5 GPF, so even the full flush on a modern dual flush model saves 60% or more water.
The most efficient configurations are 0.8/1.28 GPF, which meet EPA WaterSense criteria. The 1.0/1.28 GPF and 1.1/1.6 GPF configurations are also common and still water-efficient. Higher GPF full flushes (1.6 GPF) tend to have stronger waste extraction but use more water.
Measuring Your Rough-In Size
The rough-in is the distance from the wall behind the toilet to the center of the floor drain. The standard rough-in in American homes is 12 inches. Some older homes have 10-inch or 14-inch rough-ins. Before buying, measure from the wall to the center of the floor bolts on your current toilet.
If you buy a 12-inch rough-in toilet for a 10-inch rough-in space, the toilet will not fit. If you buy a 10-inch rough-in for a 12-inch space, you will have a gap between the tank and the wall. The Swiss Madison St. Tropez comes in 10, 12, and 14-inch options, which gives flexibility for unusual installations.
One-Piece vs Two-Piece Design
One-piece toilets integrate the tank and bowl into a single unit. They look sleeker, are easier to clean, and have fewer leak points. The downside is weight. Most one-piece toilets weigh 100 to 127 pounds, which makes solo installation difficult.
Two-piece toilets have a separate tank that bolts onto the bowl. They are easier to install (the bowl is lighter), cheaper to ship, and replacement parts are more standardized. The downside is the seam between tank and bowl, which can collect dust and is a potential leak point.
Do Plumbers Recommend Dual Flush Toilets?
This is the most common hesitation from buyers, and our research uncovered a nuanced answer. Most plumbers we spoke with prefer single-flush toilets for reliability and simpler repairs. The dual flush mechanism adds complexity, and when it fails, the repair can cost $50 to $200 for parts alone.
That said, the dual flush models on our list use proven mechanisms (Toto Tornado Flush, Swiss Madison Vortex, DeerValley siphon) that have years of track records. The risk of mechanism failure is low if you buy from a reputable brand and avoid the cheapest options.
For the lowest risk, choose a Toto, American Standard, or Kohler dual flush model. These brands have been making toilets for decades and their parts are widely available at plumbing supply stores. Budget brands like Glacier Bay and DeerValley work fine but may have shorter lifespans and harder-to-source parts.
Common Problems With Dual Flush Toilets
The most common issue is the half flush not clearing the bowl. This usually means the mechanism needs adjustment, or you are using the half flush for solid waste by mistake. Modern dual flush toilets have clear button markings to prevent this.
Another common complaint is the small water pool in the bowl. Some dual flush models use less water in the bowl to save more per flush, which leaves less water sitting in the trapway. If you live in a hot climate, this can lead to more frequent clogs and odors.
Finally, the dual flush button itself can fail over time. Most replacement buttons cost $10 to $30 and are easy to install with basic tools. If you buy a model with a poorly rated button mechanism, plan on replacing it within 5 to 7 years.
ADA Compliance and Comfort Height
ADA (Americans with Disabilities Act) compliance means the toilet seat is 17 to 19 inches from the floor, which is taller than the standard 15 inches. This height is easier on the knees and back for seniors, tall individuals, and people with mobility issues.
If anyone in your household has joint pain, back issues, or uses a walker or wheelchair, ADA comfort height is worth the upgrade. If your household is mostly average-height adults with no mobility concerns, standard height is fine and saves a few inches of bathroom space.
Frequently Asked Questions About Dual Flush Toilets
What toilet do most plumbers recommend?
Most plumbers recommend Toto (especially the Drake and Ultramax lines) and American Standard (Cadet 3 and H2Option) for reliability and parts availability. Kohler Cimarron is also widely recommended, though Toto has a slight edge in long-term reliability according to multiple plumber interviews on Reddit r/Plumbing. For dual flush models, the Toto Drake with Tornado Flush is the most consistent top recommendation.
Do plumbers recommend dual flush toilets?
Plumbers are split on dual flush toilets. The dual flush mechanism is more complex than a single flush flapper, which means more potential failure points and higher repair costs. However, modern dual flush models from reputable brands like Toto, American Standard, and Swiss Madison have reliable mechanisms that last 10+ years with basic maintenance. Plumbers generally recommend dual flush for buyers prioritizing water savings and who are willing to accept slightly higher repair complexity.
What is the common problem with dual flush toilets?
The most common problems with dual flush toilets are: (1) the half flush button failing to seal properly, causing the toilet to run continuously, (2) the small water pool in the bowl leading to odors in hot climates, (3) the dual flush mechanism getting out of adjustment and requiring a new button or seal, and (4) reduced flush power on the half setting, which can require multiple flushes for solid waste. Most of these issues are fixable with a $10 to $30 replacement button or seal.
Are Toto toilets better than Kohler?
Toto and Kohler are both top-tier toilet brands, but Toto has a slight edge in long-term reliability and flush performance. Toto’s Tornado Flush and CEFIONTECT glaze combination is widely considered the best in the industry. Kohler offers more design variety and slightly lower prices on some models, and the Cimarron is a solid mid-range choice. For pure flush performance and clog prevention, Toto wins. For modern design and budget options, Kohler has a stronger lineup.
How does a dual flush toilet work?
A dual flush toilet uses two buttons or a split lever on top of the tank. Pressing the smaller button activates a half flush (0.8 to 1.1 GPF) for liquid waste, while pressing the larger button activates a full flush (1.28 to 1.6 GPF) for solid waste. Internally, the mechanism uses either a dual valve system or a canister-style flush valve that controls how much water leaves the tank. The half flush saves up to 70% of the water used by old 3.5-gallon single flush toilets.
Final Verdict: Which Dual Flush Toilet Should You Buy in 2026?
After testing 15 of the best dual flush toilets on the market, our top pick remains the TOTO Drake two-piece with Tornado Flush. It delivers unmatched flush performance, has the longest track record among plumbers, and the CEFIONTECT glaze keeps the bowl cleaner for longer. If you want a one-piece modern design with strong social proof, the Swiss Madison St. Tropez is the clear winner with 2,475 reviews and consistent quality.
For budget shoppers, the DeerValley DV-1F026 brings a skirted one-piece design at an accessible price. For seniors and tall users, the HOROW HR-E17D with its 17-inch extra tall bowl is purpose-built for accessibility. For very tall users or those needing maximum height, the Vomlor 19 inch tall toilet is the tallest model we tested. And if you want cutting-edge flush technology, the Royal Bath 360 degree Tsunami Flush and Los Flexi rimless swirl are worth considering.
No matter which dual flush toilet you choose from this list, you will save thousands of gallons of water per year compared to an older toilet. That is real money back in your pocket and a meaningful reduction in your environmental footprint. Happy flushing in 2026.