Best One Piece Dual Flush Toilets in 2026: 15 Picks Compared on Specs
From a pool of 40 one piece dual flush toilet listings, the HOROW T0338W10 is our top pick for most bathrooms. It pairs a one piece body with a dual flush and a 17.3-inch ADA chair height, covering the two specs that matter to many buyers. The picks below were selected from the stated specifications in the catalogue; no unit was tested or installed, and the prices shown are live listing prices.
15 picks from 11 toilets that match this guide with a price we can quote today, made by 26 makers. The prices below are current and each carries its read time.
Quick picks
The best fit for you
- For taller users and accessible remodels: The HOROW T0338W10's 17.3-inch ADA chair height is the clearest accessibility feature in this list, and its dual flush comes in a one piece body. See pick 1
- For tiny bathrooms: The WinZo Compact 22.8 has a stated depth of 22.8 inches, the shortest in this list, and still includes a dual flush. See pick 2
- For smart bidet buyers: The Kohler Leap combines a built-in bidet, elongated bowl, quiet-close seat, and dual flush in a one piece unit. See pick 3
- For 10-inch rough-in layouts: If the floor drain offset is 10 inches, this DeerValley is one of the few compact one piece dual flush models built for it. See pick 7
Our 15 picks
1 Best overall
HOROW T0338W10 One Piece Toilet with ADA Chair Height 17.3"
- Pieces
- One-piece
- Flush
- Dual flush
- Seat height
- Chair height
The HOROW T0338W10 pairs a one piece body with a dual flush and a 17.3-inch ADA chair height, which makes it useful for the widest range of bathrooms. It is the pick to start with when the priority is an accessible seat height without giving up the dual flush layout.
Pros
- One piece construction with a 17.3-inch ADA chair height stated in the name
- Dual flush mechanism included
- Chair height suits taller users and accessibility-minded remodels
Cons
- Bowl shape is not stated by the seller
- Rough-in size is not stated by the seller
- Reduced and full flush volumes are not stated by the seller
Good fit if
- Households where one toilet will serve people of different heights
- Remodels that want an accessible chair height without smart electronics
Skip if
- Buyers who have not measured the floor drain offset
- Buyers who require an elongated bowl or a built-in bidet
Verdict: A well-rounded one piece choice when chair height is the deciding feature.
2 Best for tiny bathrooms
WinZo Compact One Piece Toilet 22.8" Depth Modern Short Design Dual
- Pieces
- One-piece
- Flush
- Dual flush
- Rough-in
- 12 in
- Compact
- Yes
The WinZo Compact 22.8 declares its depth in the model name, giving buyers a concrete dimension for a tiny bathroom. It keeps the one piece and dual flush basics while trading a longer footprint for a shorter one.
Pros
- 22.8-inch depth, the shortest stated depth among the picks
- 12-inch rough-in stated
- One piece dual flush built for small spaces
Cons
- Seat height is not stated by the seller
- Bowl shape is not stated by the seller
Good fit if
- Tiny bathrooms, powder rooms, and alcove layouts
- 12-inch rough-in drain positions
Skip if
- Buyers who need a chair height seat
- Buyers who want an elongated bowl confirmed
Verdict: The clearest compact dimension in this list for a very small bathroom.
3 Best smart bidet toilet
Kohler Leap One-Piece Elongated Smart Toilet with Bidet Built
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Bidet built in or included
- Yes
The Kohler Leap is an elongated one piece with a built-in bidet, quiet-close seat, and dual flush in one listing. It is the only pick in this list from Kohler, and it is the smart option for buyers who want the features without a separate bidet seat.
Pros
- Built-in bidet, quiet-close seat, and dual flush in one one piece toilet
- Elongated bowl specified
- Listed under the Kohler brand
Cons
- Flush volume is not stated by the seller
- Electrical requirements for the smart functions are not stated by the seller
Good fit if
- Bathrooms where an electric outlet can be placed near the toilet
- Buyers who want a bidet without a separate seat unit
Skip if
- Homes with no accessible power source near the toilet
- Buyers who prefer a tankless smart toilet
Verdict: The full-feature smart bidet pick when a one piece elongated body is required.
4 Best tankless smart toilet
Loniko Electric Smart Toilet with Bidet Built
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Gallons per flush
- 1.2 to 1.4 GPF
- Bidet built in or included
- Yes
The Loniko Electric Smart Toilet is tankless and includes a built-in bidet, foot sensor, and dual auto flush. Because there is no tank, the profile is slimmer and the toilet draws water directly from the supply line.
Pros
- Tankless one piece design
- Built-in bidet
- Foot sensor and dual auto flush listed
- Elongated bowl with a 1.2 to 1.4 GPF range stated
Cons
- Power supply and installation needs are not stated by the seller
- Seat heating and other smart details beyond the listed ones are not stated by the seller
Good fit if
- Buyers who want a slim, tankless profile
- Bathrooms with a nearby outlet and supply line
Skip if
- Buyers who prefer a conventional tank-and-bowl look
- Anyone who does not want electric smart functions
Verdict: The tankless smart one piece option when a foot sensor and bidet are required.
5 Best rimless chair height design
Satin Gold Tone Toilet
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Gallons per flush
- 1.2 to 1.4 GPF
- Seat height
- Chair height
- Rough-in
- 12 in
The Los Flexi is the only pick in this list with a rimless swirl flush and a satin gold finish. It also carries a 17.3-inch ADA comfort chair height and an elongated bowl, so the style does not come at the cost of accessibility.
Pros
- 17.3-inch ADA comfort chair height stated
- Rimless swirl flush specifically stated
- Elongated bowl with a 12-inch rough-in stated
- Satin gold finish described
Cons
- Flush volume is stated only as a 1.2 to 1.4 GPF range
- No smart features are included
- The finish may not match a conventional white bathroom
Good fit if
- Design-led bathrooms where the fixture is part of the decor
- Users who want chair height, elongated, and rimless in one toilet
Skip if
- Buyers who want a white or neutral fixture
- Buyers who need a reduced and full flush split stated
Verdict: A distinctive rimless chair height option for a design-forward bathroom.
6 Best elongated chair height
St. Tropez Comfort Height One-Piece Elongated Toilet
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Gallons per flush
- 1.5 to 1.6 GPF
- Seat height
- Chair height
The St. Tropez Comfort Height is an elongated chair height one piece with a vortex dual flush and a 1.1/1.6 GPF split in the name. It is the chair height pick for buyers who want the larger bowl shape that the HOROW pick does not state.
Pros
- Chair height and elongated bowl in the same unit
- Vortex dual flush with 1.1/1.6 GPF stated in the name
- White hardware version described
Cons
- Rough-in size is not stated by the seller
- Seat material and soft-close behavior are not stated by the seller
Good fit if
- Users who need chair height and prefer an elongated bowl
- Conventional bathrooms where white hardware fits
Skip if
- Buyers with a non-12-inch rough-in until they confirm the fit
- Buyers who require a soft-close seat confirmed in the listing
Verdict: The elongated chair height pick when the bowl shape matters as much as the seat height.
7 Best compact for a 10-inch rough-in
DeerValley Compact One Piece Toilet Standard Seat Height for Small
- Pieces
- One-piece
- Flush
- Dual flush
- Gallons per flush
- 1.5 to 1.6 GPF
- Seat height
- Standard height
- Rough-in
- 10 in
- Compact
- Yes
$215.00 (as of 10/15/2026 22:57 PDT - Details)
This DeerValley is compact, standard height, and one piece, but the standout spec is the 10-inch rough-in. It gives small-bathroom buyers a model for a drain offset that many standard toilets do not cover.
Pros
- Compact one piece body
- 10-inch rough-in stated
- Dual flush with a 1.1/1.6 GPF split in the name
- Standard seat height
Cons
- Seat height is standard, not chair height
- Bowl shape beyond the compact description is not stated by the seller
Good fit if
- Small bathrooms with a 10-inch rough-in
- Buyers who prefer standard seat height
Skip if
- Homes with a 12-inch rough-in
- Users who need a chair height seat
Verdict: The compact one piece pick when the drain offset is 10 inches.
8 Best for a 14-inch rough-in
St. Tropez One-Piece 14" Rough-in 1.1/1.6 GPF Dual Top Flush Elongated
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Gallons per flush
- 1.5 to 1.6 GPF
- Rough-in
- 14 in
A 14-inch rough-in filters out most toilets, and this St. Tropez is the only pick in this list specified for it. It pairs the uncommon offset with an elongated bowl, a dual top flush, and a 1.1/1.6 GPF split.
Pros
- 14-inch rough-in explicitly stated
- Elongated bowl
- Dual top flush with 1.1/1.6 GPF in the name
- Glossy white finish
Cons
- Seat height is not stated by the seller
- The 14-inch rough-in limits this toilet to that specific drain position
Good fit if
- Homes with a measured 14-inch rough-in
- Buyers who want an elongated bowl with a dual flush
Skip if
- Homes with a standard 12-inch or 10-inch rough-in
- Users who need a chair height seat
Verdict: The go-to pick when the floor drain is 14 inches from the wall.
9 Best wall-hung smart toilet
Signature Hardware 955252-E Glinda 1.28 GPF Dual Flush Wall Mounted One
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Gallons per flush
- 1.2 to 1.4 GPF
- Wall-hung
- Yes
- Bidet built in or included
- Yes
The Signature Hardware Glinda is the wall-hung option in this list, with an elongated one piece bowl, smart features, and a 1.2 to 1.4 GPF range. Mounting the toilet on the wall frees the floor area and gives the bathroom a different visual line.
Pros
- Wall-hung one piece design
- Elongated bowl specified
- Smart toilet features listed
- Low 1.2 to 1.4 GPF range stated
Cons
- Listing says bowl only, so the carrier, tank, and mounting hardware are not included
- Wall-hung installation needs a supporting carrier and wall access
- Reduced and full flush split is not stated
Good fit if
- Bathrooms where freeing floor space matters
- New construction or remodels with an accessible wall cavity
Skip if
- Existing bathrooms with no wall carrier system
- Buyers who want a complete ready-to-install kit from one listing
Verdict: The wall-hung smart pick when a full floor-mount toilet is not the goal.
10 Best macerating toilet for basements
WinZo Upflush 900W Macerating Toilet System for Basement
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Seat height
- Chair height
- Macerating (upflush)
- Yes
The WinZo Upflush is a macerating toilet system with a 900W pump and a rear outlet, which answers basements and rooms without a gravity drain. It is an elongated one piece with a 17-inch comfort seat height, so it keeps normal toilet features in a nonstandard installation.
Pros
- 900W macerating system stated
- Elongated one piece with a rear outlet
- 17-inch comfort seat height
- Dual flush included
Cons
- Requires an electrical supply for the pump
- Installation is more involved than a standard floor-mount toilet
- Not a direct replacement for a normal gravity drain toilet
Good fit if
- Basements and lower levels without a sewer drain below the fixture
- Buyers who know they need a macerating pump system
Skip if
- Standard bathroom remodels with an existing floor drain
- Buyers who do not want a powered toilet
Verdict: The best fit for a basement toilet when a standard drain is not available.
11 Best low-water dual flush
Casta Diva Compact One Piece Toilet for Bathrooms
- Pieces
- One-piece
- Flush
- Dual flush
- Gallons per flush
- 1.2 to 1.4 GPF
- Compact
- Yes
The Casta Diva listing states 0.8 and 1.28 GPF flush volumes, the lowest reduced flush figure among the picks. It is also a compact one piece, so the low-water design fits small bathrooms as well.
Pros
- 0.8 and 1.28 GPF volumes stated in the listing
- Compact one piece body
- Dual flush mechanism
Cons
- Bowl shape is not stated by the seller
- Rough-in size is not stated by the seller
- Seat details are not stated by the seller
Good fit if
- Water-conscious households
- Small bathrooms where the compact body helps
Skip if
- Buyers who want a specific bowl shape confirmed
- Buyers who need a rough-in size confirmed
Verdict: The low-water compact pick for buyers who want the smallest flush volumes in this list.
12 Best square chair-height design
WOODBRIDGE Modern Square Design One Piece Dual Flush 1.28 GP Toilet
- Pieces
- One-piece
- Flush
- Dual flush
- Seat height
- Chair height
The WOODBRIDGE square toilet brings a different silhouette from the round and elongated picks, and it adds a chair height and soft-closing seat. The listing's 1.28 GP figure suggests a lower water use, but the split between reduced and full flush is not broken out.
Pros
- Square one piece design
- Chair height seat
- Soft-closing seat specified
- Dual flush with a 1.28 GP figure in the listing
Cons
- Reduced and full flush volumes are not broken out in the listing
- Rough-in size is not stated by the seller
Good fit if
- Bathrooms with a modern square design theme
- Users who want chair height and a soft-closing seat
Skip if
- Buyers who prefer an elongated or round bowl
- Buyers who need a confirmed rough-in
Verdict: The square one piece choice when design and seat height are the priorities.
13 Best square toilet for a 10-inch rough-in
Swiss Madison SM-1T278
- Pieces
- One-piece
- Flush
- Dual flush
- Gallons per flush
- 1.5 to 1.6 GPF
- Rough-in
- 10 in
The Swiss Madison Concorde combines a square bowl with a 10-inch rough-in, a pairing that is rare in this pool. It also uses a 1.1/1.6 GPF dual flush, so it works for a specific drain offset without giving up the dual flush feature.
Pros
- Square bowl shape
- 10-inch rough-in specified
- 1.1/1.6 GPF dual flush stated in the name
Cons
- Seat height is not stated by the seller
- Seat details are not stated by the seller
Good fit if
- Design-conscious bathrooms with a 10-inch rough-in
- Buyers who like square bowls
Skip if
- Buyers who want an elongated bowl
- Homes where the rough-in is not 10 inches
Verdict: The square 10-inch rough-in pick for buyers with that exact drain position.
14 Best black and gold style
Jastoeny Black Gold Elongated One-Piece Toilet
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Gallons per flush
- 1.2 to 1.4 GPF
The Jastoeny Black Gold is the decorative pick in this list, with a black and gold finish over an elongated one piece body. The listing gives 1.03/1.45 GPF volumes, so the reduced flush is lower than the more common 1.1/1.6 splits.
Pros
- Black and gold finish explicitly stated
- Elongated one piece body
- 1.03/1.45 GPF dual flush volumes listed
Cons
- Rough-in size is not stated by the seller
- Seat height is not stated by the seller
- Non-white finish is the only option described
Good fit if
- Bathrooms where the toilet is part of the decor
- Buyers who want an elongated bowl with a low reduced flush
Skip if
- Traditional white bathrooms
- Buyers who need a rough-in size confirmed
Verdict: The black and gold style pick with a lower reduced flush than most picks here.
15 Best compact elongated
HOROW HR-ST076WD One Piece Toilet
- Pieces
- One-piece
- Bowl shape
- Elongated
- Flush
- Dual flush
- Gallons per flush
- 1.5 to 1.6 GPF
- Rough-in
- 12 in
- Compact
- Yes
The HOROW HR-ST076WD takes the compact one piece layout and adds an elongated bowl, which is useful when space is tight but the larger seating area is still wanted. Its name states a 1.1/1.6 GPF dual flush split.
Pros
- Compact one piece construction
- Elongated bowl, the larger seating option among compact picks
- 1.1/1.6 GPF dual flush stated in the name
Cons
- Rough-in size is not stated by the seller
- Seat height is not stated by the seller
- Seat details are not stated by the seller
Good fit if
- Small bathrooms that need an elongated bowl
- Buyers who want the 1.1/1.6 split stated
Skip if
- Buyers who need a chair height seat
- Buyers who need a confirmed rough-in
Verdict: A compact elongated pick for small bathrooms that do not want a round bowl.
Specifications side by side
| # | Toilet | Pieces | Bowl shape | Flush | Gallons per flush | Seat height | Rough-in |
|---|---|---|---|---|---|---|---|
| 1 | HOROW T0338W10 One Piece Toilet with ADA Chair Height 17.3" | One-piece | not stated | Dual flush | not stated | Chair height | not stated |
| 2 | WinZo Compact One Piece Toilet 22.8" Depth Modern Short Design Dual | One-piece | not stated | Dual flush | not stated | not stated | 12 in |
| 3 | Kohler Leap One-Piece Elongated Smart Toilet with Bidet Built | One-piece | Elongated | Dual flush | not stated | not stated | not stated |
| 4 | Loniko Electric Smart Toilet with Bidet Built | One-piece | Elongated | Dual flush | 1.2 to 1.4 GPF | not stated | not stated |
| 5 | Satin Gold Tone Toilet | One-piece | Elongated | Dual flush | 1.2 to 1.4 GPF | Chair height | 12 in |
| 6 | St. Tropez Comfort Height One-Piece Elongated Toilet | One-piece | Elongated | Dual flush | 1.5 to 1.6 GPF | Chair height | not stated |
| 7 | DeerValley Compact One Piece Toilet Standard Seat Height for Small | One-piece | not stated | Dual flush | 1.5 to 1.6 GPF | Standard height | 10 in |
| 8 | St. Tropez One-Piece 14" Rough-in 1.1/1.6 GPF Dual Top Flush Elongated | One-piece | Elongated | Dual flush | 1.5 to 1.6 GPF | not stated | 14 in |
| 9 | Signature Hardware 955252-E Glinda 1.28 GPF Dual Flush Wall Mounted One | One-piece | Elongated | Dual flush | 1.2 to 1.4 GPF | not stated | not stated |
| 10 | WinZo Upflush 900W Macerating Toilet System for Basement | One-piece | Elongated | Dual flush | not stated | Chair height | not stated |
| 11 | Casta Diva Compact One Piece Toilet for Bathrooms | One-piece | not stated | Dual flush | 1.2 to 1.4 GPF | not stated | not stated |
| 12 | WOODBRIDGE Modern Square Design One Piece Dual Flush 1.28 GP Toilet | One-piece | not stated | Dual flush | not stated | Chair height | not stated |
| 13 | Swiss Madison SM-1T278 | One-piece | not stated | Dual flush | 1.5 to 1.6 GPF | not stated | 10 in |
| 14 | Jastoeny Black Gold Elongated One-Piece Toilet | One-piece | Elongated | Dual flush | 1.2 to 1.4 GPF | not stated | not stated |
| 15 | HOROW HR-ST076WD One Piece Toilet | One-piece | Elongated | Dual flush | 1.5 to 1.6 GPF | not stated | 12 in |
How the picks were chosen
We started with a pool of 40 one piece dual flush toilet listings from the catalogue filter. We removed near-duplicate listings and kept models with meaningful differences in seat height, rough-in size, flush volume, bowl shape, and installed smart features. We then compared each remaining toilet on the specs the seller publishes: piece construction, flush type, gpf figures, dimensions, and any stated seat or rough-in measurements. Prices shown next to each pick are read live from the listing at the time displayed on the page, so they are current when published but will move. No member of the site has installed, flushed, or otherwise tested any of these units.
Picking the right one for you
One piece vs two piece
A one piece toilet is cast with the tank and bowl as a single unit. The practical result is a smooth exterior with no tank-to-bowl seam, which gives you fewer crevices to clean and a lower profile than many two piece toilets. The tradeoff is usually weight: a one piece body is a larger single piece to get through a doorway and into position.
Why dual flush matters
Dual flush toilets give you two flush volumes: a reduced flush for liquid waste and a full flush for solid waste. EPA's WaterSense program says a dual flush toilet can save more water when the reduced mode is used. When comparing models, look for two GPF numbers in the listing. For example, a 1.1/1.6 GPF model uses roughly 1.1 gallons for the reduced flush and 1.6 gallons for the full flush.
Seat height and accessibility
Seat height changes how the toilet feels for people of different sizes and mobility levels. Chair height models place the seat close to the height of a standard chair, and several listings in this pool state a 17.3-inch ADA chair height. The ADA's 2010 Standards set the accessibility requirements for toilet seats; if that is a factor in your household, look for an explicit chair height figure rather than assuming one.
Rough-in: the measurement that decides the fit
The rough-in is the distance from the finished wall behind the toilet to the center of the floor drain. The listings in this pool include 10-inch, 12-inch, and 14-inch rough-ins, and a one piece toilet only fits the size it is built for. Measure from the wall to the center of the drain before you buy, and skip any listing that does not state a rough-in if the size is not already known.
Smart features and tankless designs
Smart one piece toilets add electric features such as a bidet, heated seat, automatic lid, foot sensor, or tankless water supply. A tankless model draws water directly from the supply line rather than from a tank, which changes the plumbing and electrical requirements. Before choosing a smart toilet, confirm where the power connection will come from and what the listing says about included components.
Compact bodies and bowl shapes
Compact one piece toilets are made for small bathrooms, powder rooms, or alcoves, and some listings give a specific depth such as 22.8 inches. Bowl shape also affects the footprint: elongated bowls offer more seated length but need more front-to-back space, while round bowls are shorter. Square bowls are a design choice and show up in a few picks here, so decide whether the shape is for comfort or for style.
Questions
What does dual flush mean?
A dual flush toilet has two flush settings. One setting uses less water for liquid waste and the other uses more for solid waste. Listings usually show the two volumes as GPF numbers, such as 1.1/1.6 or 0.8/1.28. EPA notes that a dual flush toilet can save more water when you use the reduced mode for liquid waste.
How much water does a one piece dual flush toilet use?
It depends on the model. The current federal standard for a standard toilet is 1.6 gallons per flush, and WaterSense labeled toilets are certified to use 1.28 gallons per flush or less. Many dual flush listings give a reduced number and a full number, so the reduced flush can be well under 1.28 while the full flush stays near 1.6.
Is a one piece toilet better than a two piece?
One piece toilets combine the tank and bowl into a single ceramic body, which removes the tank-to-bowl seam. That makes the outside easier to wipe and gives the toilet a lower profile. They can be heavier to carry and may need more care when moving through doorways, but for cleaning and a streamlined look, the one piece layout is the point of this category.
What is chair height?
Chair height refers to the seat being close to the height of a standard chair. Many brands use ADA chair height when a model meets the accessibility range, and the HOROW T0338W10 and Los Flexi picks in this guide list 17.3 inches. The ADA's 2010 Standards set the accessibility requirements for toilet seats.
What rough-in size do I need?
The rough-in is the distance between the finished wall and the center of the toilet's floor drain. The listings in this pool include 10-inch, 12-inch, and 14-inch rough-ins. Measure from the finished wall to the center of the drain before buying, because a toilet built for the wrong rough-in will not align with the drain without moving the plumbing.
Do all dual flush toilets save water?
Dual flush saves water only if the reduced flush is used for liquid waste. Toilets account for nearly 30 percent of indoor water in a typical home, according to EPA, so the setting matters. The full flush can still use close to 1.6 gallons per flush, so compare the two GPF numbers in the listing before choosing.
Revision notes
- : First published.