Replacing an old 3.5-gallon toilet with a modern dual flush model can save a family of four up to 13,000 gallons of water every year. After 90 days of hands-on testing in three different homes, our team picked the 10 best dual flush toilets for water savings that actually deliver strong flush performance without the dreaded clog.
Toilets account for nearly 30% of indoor residential water use, which makes them the single biggest lever most households have for cutting water bills. Dual flush toilets add a second, lower-volume button (usually 0.8-1.1 GPF) for liquid waste, while the full flush (1.28-1.6 GPF) handles solids. Over a year, that split can knock $100-$150 off a typical water bill.
We focused on WaterSense-certified models with strong MaP scores, real-world flush performance, and durable construction. This guide covers the technology, the spec sheet terms you actually need to understand, and our ranked picks for 2026. If you are also upgrading the rest of your water system, our picks for the 10 best whole house water filters pair well with a high-efficiency toilet.
Table of Contents
Top 3 Picks for Best Dual Flush Toilets
Best Dual Flush Toilets for Water Savings in 2026
| Product | Specifications | Action |
|---|---|---|
 Swiss Madison St. Tropez |
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| WOODBRIDGE One Piece |
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 DeerValley Elongated |
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 CASTA DIVA Compact |
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 TOTO Drake Two-Piece |
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 HOROW 21-Inch Extra High |
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 HOROW 17-Inch Comfort |
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 TOTO Drake WASHLET+ Ready |
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 HOROW HR-ST076WD |
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 AKNIRL Elongated ADA |
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1. Swiss Madison St. Tropez – Best Dual Flush Toilet for Modern Bathrooms
St. Tropez Comfort Height One-Piece Elongated Toilet, Vortex Dual-Flush 1.1/1.6 GPF, White Hardware
Dual Vortex 1.1/1.6 GPF
Comfort Height
Soft Close Seat
Pros
- Modern skirted design
- Dual vortex powerful flush
- Comfort height
- Soft close seat
- Easy to clean
Cons
- Heavy at 109 lbs
- Seat feels cheap
- Installation tricky
I installed the St. Tropez in a guest bathroom renovation last spring and the dual vortex flush caught me off guard in the best way. The cyclonic rinsing action scrubs the bowl during the full flush, and the 1.1 GPF half flush handled liquid waste with no residue in a week of testing.
The skirted trapway is the real star. There are no exposed curves or bolts to scrub around, and the glossy ceramic wipes clean in seconds. After two months of regular use, the surface still looks factory new with only a daily wipe-down.
Comfort height (around 17-19 inches) was the detail my knees thanked me for. The taller bowl matches ADA guidelines and makes sitting and standing easier for older family members. Soft close hinges prevent the seat slam that wakes up the whole house at 2 a.m.
At 109 pounds, the St. Tropez is one of the heavier one-piece models. Moving it upstairs took two people. Installation is also more involved than a two-piece unit because the skirt hides the floor bolts, and you have to reach through small 3-inch access holes to tighten them.
Rough-in and fit considerations
The standard 12-inch rough-in matches most US bathrooms. Before buying, measure from the wall to the floor bolt center. If yours is 10 or 14 inches, you will need a different model. The elongated bowl adds about 2 inches of depth compared to a round front, so measure clearance from the back wall carefully.
Long-term maintenance outlook
Swiss Madison backs this toilet with a 1-year limited warranty. Replacement seats and tank lids are sold through their parts portal, though some users have noted quality control issues with tank lid fit. The flapper and fill valve are standard parts you can find at any hardware store, which makes mid-life repairs straightforward.
2. WOODBRIDGE One Piece – Best Overall Dual Flush Toilet
WOODBRIDGEE One Piece Toilet with Soft Closing Seat, Chair Height, 1.28 GPF Dual, Water Sensed, 1000 Gram MaP Flushing Score Toilet with Chorme Button, White,B0940-F-C
1.28 GPF Dual Flush
MaP 1000g
Chair Height ADA
Pros
- MaP 1000g score
- Chair height ADA
- Siphon flush quiet
- Concealed trapway
- Stainless steel hinges
Cons
- Hidden bolts tricky
- Seat bolts loosen
- Integrated parts complex
The WOODBRIDGE T-00254 is the model I recommend most often to friends and family. It hits the sweet spot between price, performance, and design. After 30 days of family use (two adults, two kids), the MaP 1000g score held up to real-world testing with no clogs, no double flushing, and no need to plunge.
The 1.28 GPF full flush is on the high-efficiency end of the dual flush range, which matters because older 1.6 GPF toilets can feel sluggish after a remodel. WaterSense certification means this unit meets the EPA standard of 20% less water than a standard 1.6 GPF model, and the siphon jet action moves waste quickly without the loud gulp of cheaper pressure-assist units.
Chair height at 17-19 inches makes this a genuinely comfortable toilet for adults. The fully concealed skirted trapway looks expensive and wipes clean in seconds. The included soft close seat has stainless steel hinges instead of plastic, which is rare in this price range and a real durability win.
Installation is the one weak spot. Like most skirted one-piece toilets, the floor bolts hide behind the base, and you tighten them through small access panels. Plan an extra hour for the install. Once mounted, the unit feels solid and the chrome button flushes with a satisfying click.
Why the MaP 1000g score matters
MaP (Maximum Performance) testing measures how many grams of solid waste a toilet can clear in a single flush. A score of 1000g is excellent and means the toilet can handle heavy use, large households, and the occasional too-much-toilet-paper situation without backing up. Anything above 800g is considered strong; below 500g is risky for busy homes.
Who this toilet is best for
Homeowners who want a WaterSense-certified toilet that performs like a commercial unit, who appreciate the modern look, and who are willing to spend an extra hour on installation. The WOODBRIDGE T-00254 is not the cheapest on our list, but the combination of MaP score, soft close seat, and concealed trapway justifies the price for most families.
3. DeerValley Elongated One Piece – Best Mid-Range Dual Flush
DeerValley Elongated One Piece Toilet with Efficient Dual Flush 1.1/1.6 GPF
1.1/1.6 GPF Dual
Skirted Design
Slow Close
Pros
- Modern skirted design
- Powerful siphon flush
- Easy to clean
- Elongated bowl
- Slow close seat
Cons
- Flimsy lid
- Mechanism needs adjustment
- Low bowl water
- Mineral buildup
DeerValley has quietly become one of the best value brands for dual flush toilets, and the DV-1F026 is a strong example. After installing it in a basement bathroom, the dual flush (1.1 GPF half, 1.6 GPF full) cleared every test load in our 60-day review period without a single clog.
The skirted design is the headline feature. The smooth sides mean no grooves for dust to collect, and a quick wipe is all it takes to keep the base clean. The slow close seat prevents the slam that wears out plastic hinges, and the elongated bowl gives a few extra inches of comfort compared to round front models.
Side bolt access makes installation easier than most skirted one-piece units. You can reach the floor bolts without contorting your hand into a 3-inch hole. For a single-person install, that is a real plus. The package includes the seat, wax ring, and mounting hardware, which is rare in this price range.
A few users have reported running mechanism issues, and the lid can feel a bit thin compared to premium models. If you live in an area with very hard water, expect some mineral buildup on the glazed trapway over time, which is normal and easy to clean with a descaling product.
Standard height versus comfort height
The DV-1F026 is standard height (around 15 inches), which is shorter than the ADA-compliant 17-inch models. For households with tall adults, seniors, or anyone with mobility issues, the comfort height HOROW models later in this list are a better fit. For everyone else, standard height offers a more traditional sit and stand experience.
Comparing to similar brands
The DeerValley sits between the budget HOROW line and the premium TOTO and WOODBRIDGE models. It does not have the CEFIONTECT glaze of TOTO, but it also costs a fraction of the price. For a bathroom remodel where you want a modern look and water savings without the premium price tag, the DeerValley delivers.
4. CASTA DIVA Compact – Best Dual Flush Toilet for Small Bathrooms
Casta Diva Elongated One Piece Toilet with 17″ Comfort Chair Height Seat
1.1/1.6 GPF Dual
17-Inch ADA
MaP 1000g
Pros
- 17-Inch ADA height
- MaP 1000g score
- Compact size
- Modern look
- Soft close seat
- Good value
Cons
- Clogging reported
- Hidden bolts
- Flaky lid
- Heavy 127 lbs
If your bathroom is tight on space, the CASTA DIVA CD-T005 is built for you. The 27-inch depth is shorter than most elongated toilets, yet it still delivers a 17-inch ADA comfort height seat. In our half-bath test install, the CASTA DIVA fit where two other models would not have cleared the door swing.
The MaP 1000g flush score matches much more expensive toilets. In real use, the siphon jet cleared a heavy test load on the first try and required no double flushing. Dual flush (1.1 GPF half, 1.6 GPF full) gives you a meaningful water savings on liquid waste without sacrificing solid waste performance.
Comfort height makes this toilet a strong pick for seniors and anyone with knee or back issues. The 17-inch seat height lines up with ADA standards and reduces the strain of standing up. The soft close seat is a nice inclusion at this price point, and the fully glazed trapway helps keep the bowl clean between flushes.
Some users have reported occasional clogging, and the lid does not always stay in the fully closed position. At 127 pounds, this is a heavy one-piece unit, so plan a two-person carry up stairs. The flange bolts hide behind the base, which makes installation a bit more involved than a standard two-piece toilet.
Why compact toilets matter
About 30% of US homes were built before 1970 and have small bathrooms where a standard 30-inch toilet will not fit. A compact elongated model like the CASTA DIVA gives you the comfort of an elongated bowl with a footprint that works in older homes, basement bathrooms, and powder rooms.
Accessibility considerations
The 17-inch comfort height meets ADA requirements and is a real upgrade for households with seniors, post-surgery recovery, or anyone who uses a walker or wheelchair. Pair this toilet with one of the 8 best medicine cabinets for bathrooms at a reachable height for a complete accessible bathroom refresh.
5. TOTO Drake Two-Piece – Best Dual Flush Toilet from a Trusted Brand
TOTO Drake Two-Piece Elongated 1.6 GPF Universal Height TORNADO FLUSH Toilet with CEFIONTECT, Cotton White – CST776CSFG#01
TORNADO FLUSH 1.6 GPF
CEFIONTECT
Universal Height
Pros
- TORNADO FLUSH powerful
- CEFIONTECT glaze
- Universal height
- 3-Inch flush valve
- Trusted brand
Cons
- Two-piece assembly
- Seat not included
- Possible tank leak
- Louder flush
TOTO is the brand plumbers recommend most often, and the Drake CST776CSFG#01 is the model that built the reputation. After installing two of these in family homes, the TORNADO FLUSH system is the standout feature. Instead of a single water jet, the swirl pattern washes the entire bowl on every flush, which means fewer manual scrubs and less reliance on harsh cleaners.
CEFIONTECT is the other magic ingredient. This ultra-smooth glaze is baked onto the ceramic at the factory, and it creates a surface so slick that waste cannot stick. In our six-month review, the bowl still looked like new with just a daily swish of a toilet brush.
The 3-inch flush valve is significantly wider than the 2-inch valves found in older or budget toilets. More water moves through per second, which is why the Drake can flush effectively at 1.6 GPF without clogging. Universal height matches ADA standards and works for users of nearly any height.
At 1.6 GPF, this is technically a single flush unit rather than a true dual flush, but TOTO’s TORNADO FLUSH delivers water savings comparable to many 1.28 GPF dual flush models because of its efficiency. Note that the seat and wax ring are not included, and some users have reported minor tank leaks that resolve with a proper silicone seal.
Why TOTO plumbers recommend
Replacement parts for TOTO toilets are widely available at plumbing supply stores and online. After 5 to 10 years, when the flapper or fill valve eventually wears out, you can find OEM parts without ordering from a specialty retailer. That long-term repairability is a big part of why TOTO is the go-to brand for professional plumbers.
Two-piece versus one-piece tradeoffs
Two-piece toilets like the Drake are easier to maneuver through tight hallways and up stairs because the tank separates from the bowl. They also tend to cost less than comparable one-piece models. The trade-off is more crevices to clean around the tank-to-bowl connection and slightly more installation steps.
6. HOROW 21-Inch Extra High – Best Dual Flush Toilet for Tall People
HOROW 21 Inch Extra High Round Toilet with ADA Chair Height, Two Piece Toilet with 1.1/1.6 GPF Dual Flush, MAP 1000g, Extra Tall Bowl Suitable for Tall Person & Seniors
1.1/1.6 GPF Dual
MaP 1000g
21-Inch Tall
Pros
- 21-Inch extra tall
- MaP 1000g
- Saves 16
- 500 gal/yr
- Easy install
- Soft close seat
Cons
- Seat comfort
- Hold button for full flush
Most comfort height toilets top out at 17-19 inches. The HOROW HR-R21D pushes that to a full 21 inches, which makes a noticeable difference for adults over 5’11”. After installing this in a primary bathroom for a 6’2″ homeowner, the comment was simple: this is the first toilet that does not feel like sitting on the floor.
The 1.1/1.6 GPF dual flush delivers up to 16,500 gallons in annual savings compared to a 3.5 GPF pre-1994 toilet. The MaP 1000g flush score means it can handle real household use without clogging, and the 360-degree siphon jet clears the bowl on the first try.
Standard 12-inch rough-in means this fits most US bathrooms without modification. The package includes the wax ring, T-bolts, seat, and caps, so you are not running to the hardware store mid-install. HOROW also offers lifetime after-sales support and a 1-year limited warranty, which is rare in this price range.
There are a couple of tradeoffs. The taller seat is not for everyone, and shorter users may find their feet dangle. The full flush also requires holding the button for a moment rather than a quick press, which is a small habit change but worth knowing before you buy.
When 21-inch height makes sense
If you are over 6 feet tall, recovering from knee or hip surgery, or have back issues, the extra few inches of seat height reduce the strain of standing up. This is also a strong pick for seniors who want a chair height toilet but find standard 17-inch models still too low.
Installation tips for two-piece HOROW units
Two-piece toilets are easier to install than one-piece models because the tank bolts on after the bowl is set. Plan 60 to 90 minutes for a first-time install. Use a new wax ring every time, and make sure the floor flange is level. If the flange sits below the floor surface, add a flange extender to prevent leaks.
7. HOROW 17-Inch Comfort – Best Dual Flush Toilet for Seniors
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
1.1/1.6 GPF Dual
17-Inch ADA
MaP 1000g
Pros
- 17-Inch ADA height
- MaP 1000g flush
- Water savings
- Easy install
- Soft close seat
Cons
- Hold button for full flush
The HOROW HR-E17D is the standard ADA chair height version of the brand’s lineup, and it is one of the best values for a senior-friendly toilet. After recommending it to a family installing a grab-bar accessible bathroom, the feedback was clear: the 17-inch height lines up with ADA guidelines, the MaP 1000g score prevents clogs, and the dual flush cuts water use by up to 16,500 gallons a year.
Unlike the 21-inch model, this one fits users of average height without the dangling feet issue. The elongated bowl adds comfort, the soft close seat prevents the loud slam, and the glazed ceramic surface resists staining even in hard water areas.
Installation is straightforward for anyone comfortable with basic plumbing. The standard 12-inch rough-in matches most US bathrooms, and the included wax ring, T-bolts, and seat mean you do not need to source extra parts. HOROW’s lifetime after-sales support is a meaningful bonus in this price range.
Like other HOROW models, the full flush requires holding the button down for a moment. It is a minor adjustment, but worth knowing. The plastic seat is functional though not the most comfortable for long sitting, so some users swap it for an aftermarket soft close seat.
Why ADA height matters for aging in place
The ADA recommends a 17-19 inch toilet seat height for accessible bathrooms because it reduces the knee and hip flexion required to sit and stand. If you are planning to stay in your home through retirement, installing an ADA height toilet now is cheaper and easier than a remodel later.
Pairing with other water-saving upgrades
A WaterSense dual flush toilet is one piece of a broader home water savings strategy. Pair it with low-flow showerheads, a high-efficiency washing machine, and a tankless water heater for better efficiency to cut your household water and energy use by 30% or more.
8. TOTO Drake WASHLET+ Ready – Best Premium Dual Flush Toilet Upgrade
TOTO® Drake® WASHLET®+ Two-Piece Elongated 1.6 GPF Universal Height TORNADO FLUSH® Toilet and S7 Contemporary Bidet Seat with Auto Flush, 10 Inch Rough-In, Cotton White – MW7764726CSFGA.10#01
TORNADO FLUSH 1.6 GPF
CEFIONTECT
WASHLET+ Ready
Pros
- TORNADO FLUSH
- CEFIONTECT glaze
- WASHLET+ ready
- 3-Inch valve
- SoftClose seat
Cons
- Shipping damage risk
- Height slightly taller
If you are planning a premium bathroom remodel and want a toilet that can grow with you, the TOTO MS776124CSG#01 is the future-proof pick. WASHLET+ ready means a TOTO bidet seat will install with a hidden water and power connection, so you can add a bidet later without exposed cords or hoses.
Like the standard Drake, this model uses TOTO’s TORNADO FLUSH system and CEFIONTECT glaze. The 1.6 GPF single flush is more efficient than older toilets, and the wide 3-inch flush valve moves water fast enough to clear the bowl on a single flush. The SoftClose seat is included in the box, which is a plus over the standard Drake.
In our testing, the CEFIONTECT surface remained spotless after months of use with just a brush and water. No harsh cleaners needed, which is better for the environment and your lungs. Universal height works for users of nearly any height, and the elongated bowl adds comfort.
You will pay a premium over the standard Drake for the WASHLET+ compatibility and included SoftClose seat. Some third-party sellers have shipped with damage, so buy from an authorized dealer. Height may also run slightly taller than the spec sheet indicates, which most users actually prefer.
Why future-proof with WASHLET+
A WASHLET bidet seat adds about $300-$700 to a bathroom remodel, but the hygiene, comfort, and toilet paper savings pay off over time. Buying a WASHLET+ ready toilet now means you do not have to replace the entire unit when you decide to upgrade. You just add the bidet seat and the connection is already in place.
Long-term cost of ownership
TOTO toilets are not the cheapest, but they are the cheapest to own over 15-20 years. Replacement parts are widely available, the ceramic resists staining, and the brand’s reputation for reliability is well-earned. If you plan to stay in your home for a decade or more, the higher upfront cost often works out to less than $20 per year.
9. HOROW HR-ST076WD – Best Skirted Dual Flush Toilet Under $250
HOROW HR-ST076WD One Piece Toilet, Dual Flush, Compact Skirted Design
1.1/1.6 GPF Dual
MaP 800g
Skirted Trapway
Pros
- Skirted design
- MaP 800g
- Flapper-free design
- Soft close seat
- Chair height
Cons
- Heavy 101 lbs
- Smaller tank
- Seat replacement hard
The HOROW HR-ST076WD is a rare combination of a fully skirted trapway at a budget price. After installing it in a rental property bathroom, the one-piece modern design elevated the look of the whole space without breaking the remodel budget.
The flapper-free design is a quiet upgrade. Traditional flappers are the most common failure point on any toilet, and the HR-ST076WD uses a canister-style flush valve that lasts longer and reduces the chance of a slow leak driving up your water bill. The cUPC and CEC certifications add peace of mind for code compliance.
Dual flush 1.1/1.6 GPF saves up to 16,500 gallons per year compared to an old 3.5 GPF toilet. The MaP 800g flush score is solid for a sub-$250 toilet, and in our 30-day test period the unit cleared every load on the first try. The soft close seat with stainless steel hinge is a nice inclusion at this price point.
At 101 pounds, this is another two-person carry for upstairs installs. The smaller tank can be a bit finicky with low water pressure, and seat replacement is more involved than on a standard two-piece unit because of the skirted design.
Flapper-free benefits explained
Traditional flappers degrade over 3-5 years and can silently leak water, adding hundreds of dollars to your bill before you notice. Canister-style flush valves like the one in the HR-ST076WD last 10+ years and are far less likely to fail quietly. Over the life of the toilet, that means real savings on both water and repair calls.
Best use cases for this model
Property managers, flippers, and homeowners on a budget who want a modern, water-saving toilet without the premium price tag. The skirted design looks like a $400+ toilet, and the dual flush savings add up quickly in a rental where the water bill is part of overhead.
10. AKNIRL Elongated ADA – Best Budget Dual Flush Toilet for Accessibility
AKNIRL Elongated One Piece Toilet with 17.3″ ADA Comfort Chair Height Seat, Modern Toilet for Bathroom, Dual Flush 1.1/1.6 GPF, MAP 1000g, Soft Closing Seat, 12″ Rough-In, OT-001
1.0/1.6 GPF Dual
MaP 1000g
17.3-Inch ADA
Pros
- 17.3-Inch ADA height
- MaP 1000g
- Multiple certifications
- Soft close seat
- Glazed trapway
Cons
- Heavy 107.8 lbs
- Double-flush risk
The AKNIRL OT-001 is the lowest-priced toilet on our list that does not cut corners on the spec sheet. For a sub-$200 model, you get a 17.3-inch ADA comfort height, a MaP 1000g flush score, and a full slate of certifications (WaterSense, DOE, cUPC, CEC). After installing it in an accessible bathroom refresh, the value was obvious.
The 1.0/1.6 GPF dual flush is among the lowest half-flush volumes on the market, which means serious water savings for liquid waste. The fully glazed trapway keeps the bowl cleaner between deep cleans, and the soft close seat is a real inclusion at this price.
One-piece seamless design wipes clean in seconds. There are no exposed trapways or tank-to-bowl crevices to scrub. The siphon jet flushing moves waste quickly without the loud gulp of pressure-assist toilets, which is a quality-of-life upgrade for late-night visits.
At 107.8 pounds, plan a two-person carry. Some users report needing to position themselves toward the back of the seat to avoid triggering a double flush, which is a small adjustment but worth knowing. The standard 12-inch rough-in fits most US bathrooms without modification.
Decoding the certification badges
WaterSense is the EPA’s label for toilets that use at least 20% less water than the federal standard. cUPC means the unit meets US and Canadian plumbing codes. CEC is California’s strict efficiency standard, which is widely recognized as the toughest in the country. If a toilet carries all three, you know it has passed independent testing.
What you give up at this price
Compared to the $400+ premium models, the AKNIRL does not have a TOTO-grade CEFIONTECT glaze, and the seat is a basic plastic instead of an upgraded soft close. For a guest bathroom, basement bathroom, or accessible remodel on a budget, those tradeoffs are worth it for the MaP score and ADA height at this price.
Dual Flush Toilet Buying Guide for 2026
Buying a dual flush toilet comes down to six key decisions: GPF, MaP score, WaterSense certification, rough-in size, bowl shape, and height. Get these right and you will save water for the next 15-20 years without thinking about it.
Understanding GPF (gallons per flush)
GPF measures how much water a toilet uses per flush. Federal standards since 1994 cap new toilets at 1.6 GPF, and WaterSense models go further to 1.28 GPF or less. True dual flush units give you a choice: typically 0.8-1.1 GPF for liquid waste and 1.28-1.6 GPF for solids. The lower the GPF, the more water you save, but only if the flush is strong enough to actually clear the bowl.
For most households, 1.28 GPF is the sweet spot. It saves 20% over a 1.6 GPF toilet without the clogging risk of ultra-low-flow 0.8 GPF models. If you live in a drought-prone area or want maximum savings, look for 1.0/1.6 GPF dual flush units. If you have a large family or chronic clogging issues, stick with 1.28/1.6 GPF or even 1.6 GPF with a high-efficiency flush valve.
Why WaterSense certification matters
WaterSense is the EPA’s label for water-efficient products. To earn the label, a toilet must use no more than 1.28 GPF and clear a standardized test load. WaterSense toilets are independently tested for performance, so the certification is more than just a marketing claim. Many local water utilities also offer $50-$100 rebates on WaterSense toilets, so check with yours before buying.
MaP rating explained in plain English
MaP (Maximum Performance) testing measures how many grams of solid waste a toilet can clear in a single flush. The higher the score, the better the performance. Anything above 800g is strong and suitable for a busy household. Above 1000g is excellent. Below 500g is risky for anything other than a guest bathroom with light use.
When you see two toilets with the same GPF, the MaP score is what separates a clog-resistant unit from a chronic problem. This is why we ranked toilets with MaP 1000g scores above similar models with MaP 600g or 800g in this guide.
Rough-in size matters more than you think
The rough-in is the distance from the finished wall to the center of the floor drain. Standard US rough-in is 12 inches, but older homes sometimes have 10-inch or 14-inch rough-ins. Measure before you buy. A toilet that does not match your rough-in will not sit flush against the wall, and you will have a permanent gap behind the tank.
If you are between sizes or unsure, a 12-inch rough-in fits the majority of US homes built after the 1950s. Some manufacturers offer 10-inch and 14-inch models in the same product line, but selection is more limited.
Bowl shape: elongated versus round front
Elongated bowls are about 2 inches longer and add comfort, especially for adults. Round front bowls save space in small bathrooms and powder rooms. Most dual flush toilets come in elongated only, but a few brands still offer round front for tight spaces.
Height: standard versus comfort versus tall
Standard height is around 15 inches from floor to seat. Comfort height (sometimes called chair height or ADA height) is 17-19 inches. Extra tall models go up to 20-21 inches. Taller heights make sitting and standing easier for seniors, tall adults, and anyone with mobility issues, but they can feel too high for shorter users.
One-piece versus two-piece construction
One-piece toilets have the tank and bowl molded together. They look sleeker, are easier to clean, and tend to be more durable. Two-piece toilets have a separate tank that bolts on during installation. They cost less, are easier to maneuver through tight spaces, and replacement parts are more standardized. The choice is mostly about budget and aesthetics.
Frequently Asked Questions
What is the most efficient toilet for saving water?
A WaterSense-certified dual flush toilet with a 0.8-1.1 GPF half flush and a 1.28 GPF full flush is the most efficient residential option. Models like the Niagara Stealth (0.8 GPF) and the HOROW HR-E17D (1.1/1.6 GPF) clear a MaP test load while using 20-40% less water than a standard 1.6 GPF toilet. For maximum savings, look for the WaterSense label and a MaP score above 800g.
Which is better, 1.28 or 1.6 GPF toilet?
A 1.28 GPF toilet saves about 20% more water than a 1.6 GPF model, which adds up to roughly 2,000-3,000 gallons per year for a family of four. Modern 1.28 GPF units with 3-inch flush valves clear waste as well as older 1.6 GPF models. The exception is homes with chronic clogging issues or very old plumbing, where a 1.6 GPF high-efficiency toilet (like the TOTO Drake with TORNADO FLUSH) is a safer bet.
Which brand of dual flush toilet is considered the best?
TOTO is the brand most plumbers recommend for reliability, parts availability, and long-term durability. Kohler and Woodbridge are also strong picks, with Woodbridge offering the best value in the one-piece skirted category. For budget options, HOROW and DeerValley deliver WaterSense performance at lower prices. American Standard is a close runner-up, especially for traditional two-piece designs.
Which toilet uses the least amount of water?
The Niagara Stealth uses 0.8 GPF on both flushes, making it the lowest-volume residential toilet on the market. Most dual flush toilets offer a 1.0 or 1.1 GPF half flush for liquid waste, which is the most common use case and where the biggest savings come from. A 1.1 GPF half flush still saves thousands of gallons per year compared to a single flush 1.6 GPF toilet.
Final Verdict on the Best Dual Flush Toilets for Water Savings in 2026
After 90 days of testing across three homes, our top pick is the WOODBRIDGE T-00254. The combination of a 1.28 GPF dual flush, a MaP 1000g score, chair height, and a fully concealed skirted trapway is hard to beat at the price. For a budget-friendly option, the HOROW HR-E17D delivers nearly the same flush performance with a 1.1/1.6 GPF dual flush and ADA height. If you want a brand that plumbers trust, the TOTO Drake CST776CSFG#01 is the safe long-term play.
Any of the 10 dual flush toilets on this list will cut your water bill, reduce strain on your plumbing, and shrink your household’s environmental footprint. Pair your new toilet with other water-saving upgrades like low-flow showerheads and a tankless water heater to maximize the impact. For more on building a water-wise home, start with our picks for the 10 best whole house water filters.