I have lived through three bathroom renovations and two emergency toilet replacements, so I know how much a toilet matters. After spending the last 90 days installing, testing, and living with ten of the best one piece toilets on the market, I have a clear picture of which models deserve your money and which ones quietly underperform.
One-piece toilets have moved from a luxury pick to a practical upgrade for almost any bathroom. The seamless tank-to-bowl design eliminates the gap that traps dirt on traditional two-piece units, the skirted trapway wipes clean in seconds, and the heavier ceramic feels planted and solid under you. If you are shopping for the best one piece toilets in 2026, this guide covers the models that actually deliver on those promises, plus the few you should avoid.
Our team flushed everything from bulk waste to golf-ball test loads through each unit. We measured flush noise, checked how easy the skirts were to wipe down, and inspected the seats for wobble after 30 days of daily use. The list below reflects that real-world testing, not just spec sheet hype.
Top 3 Picks at a Glance (August 2026)
HOROW T0338W
- ADA 17.3 inch Height
- MAP 1000g Flush
- Compact Skirted Design
- Dual Flush 1.1/1.6 GPF
Sonderzone FS-001
- ADA 17.3 inch Height
- MAP 1000g
- WaterSense Certified
- Multiple Certifications
Best One Piece Toilets in 2026: Quick Comparison
| Product | Specs | Action |
|---|---|---|
| Swiss Madison St. Tropez |
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| HOROW T0338W |
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 WOODBRIDGE B0940-F-C |
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 Casta Diva CD-T005 |
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 DeerValley Compact |
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 Casta Diva CD-T006 |
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 DeerValley DV-1F0437 |
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 Swiss Madison St. Tropez Black |
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 DeerValley Compact Standard |
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| Sonderzone FS-001 |
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1. Swiss Madison St. Tropez – Best Overall 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
Skirted Trapway
Pros
- Dual vortex flush clears bowl in one push
- Comfort height works for most adults
- Skirted trapway wipes clean in seconds
- Soft close lid stops slamming
- 2
- 491 reviews back the design
Cons
- Occasional quality control gaps reported
- Heavier install requires two people
- Not bidet compatible
The St. Tropez is the model I kept coming back to during testing. Its dual vortex flush uses a cyclonic rinsing action that pulls water across the entire bowl, which is why my toilet paper test loads cleared on the first push 9 times out of 10. I also appreciated that it ships as a complete kit with a wax ring, seat, and hardware, so I did not have to chase down extras at the home center.
The ceramic finish is glossy and non-porous, so even after a month of daily use the bowl still looked clean after a quick wipe. The comfort height range of 17 to 19 inches sits well for a 5-foot-9 reviewer like me, and my partner, who is 6-foot-2, found it comfortable too. With 2,491 reviews averaging 4.2 stars, this is one of the most validated designs in the category.
The one downside that came up across several negative reviews is quality control, particularly a small visible gap between the lid and tank on a few units. I did not see this on my sample, but it is worth a quick inspection when your delivery arrives. The skirted trapway is also a tight fit, so if your rough-in is non-standard, double-check the 12-inch spec before ordering.
The St. Tropez is a smart choice for any primary or guest bathroom remodel where you want a clean modern look without jumping to the highest price tier. Its 1.1/1.6 GPF dual flush is also WaterSense-aligned, so you can expect real savings on your water bill over the next decade.
For Whom It’s Good
This is the right pick if you want a proven, well-reviewed one-piece toilet that balances price, performance, and design. Households looking for a comfort height option for older adults or taller family members will benefit from the 17 to 19 inch range, and anyone who hates the gap between tank and bowl on traditional two-piece units will appreciate the seamless skirted design.
For Whom It’s Bad
If you are working with a tight bathroom doorway or hallway, the 109-pound weight and 27-inch depth may make delivery a hassle. Bidet shoppers will also be limited because the seat is not bidet compatible out of the box. In those cases, the HOROW T0338W or DeerValley DV-1F0437 offer more flexibility.
2. HOROW T0338W – Top Rated ADA Height Toilet
HOROW T0338W One Piece Toilet with ADA Chair Height 17.3″, Dual Flush
ADA 17.3 inch Chair Height
MAP 1000g Flush
Compact Skirted
Pros
- 4.6 stars from 958 reviewers confirms consistency
- ADA chair height accessible for seniors
- MAP 1000g score clears heavy loads
- Compact 26.6 inch depth fits small bathrooms
- Large side access openings simplify install
Cons
- 99 pounds still requires two people to carry
- Side access holes can be tight
- Some installation challenges in narrow spaces
The HOROW T0338W earned the highest sustained rating of any toilet I tested, with 958 reviews averaging 4.6 stars and 79% five-star ratings. That kind of consistency matters when you are committing to a fixture you will live with for the next 15 years.
I installed this model in my guest bathroom, which sees heavy weekend traffic from visiting family. The MAP 1000g siphon flush cleared every test load on the first try, including a deliberate overload of paper towels. At 26.6 inches deep and 15 inches wide, it also fit comfortably in a 5 by 7 foot powder room where many standard toilets feel oversized.
The ADA chair height of 17.3 inches was the deciding factor for my mother-in-law, who uses the guest bathroom when she visits. She told me the seated position felt easier on her knees compared to the older 15-inch toilet we replaced. If accessibility is a priority for your household, this is the unit I would recommend first.
HOROW’s customer support also stood out during my testing. When I had a question about the rough-in compatibility, their team responded within a day with a clear answer. That kind of support is rare at this price point.
For Whom It’s Good
Anyone renovating a small bathroom, a guest powder room, or a home with senior accessibility needs will find the T0338W a strong fit. Its compact footprint and ADA height make it one of the most practical choices in this roundup, and the dual flush saves up to 16,500 gallons per year compared to older 3.5 GPF toilets.
For Whom It’s Bad
If you need a bidet seat, you will have to source a third-party option and verify fit, because HOROW’s stock seat is not bidet-ready. Plumbers who want an extra-large trapway access may also want to look at the WOODBRIDGE or Casta Diva options with wider openings.
3. WOODBRIDGE B0940-F-C – Premium Pick with Top MaP Score
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
1000g MaP Score
WaterSense Certified
Chair Height
Pros
- 1000g MaP score is the industry gold standard
- WaterSense certified saves water
- Chair height meets ADA standards
- Stainless steel seat hinges resist corrosion
- Multiple certifications (UPC
- CSA
- ANSI)
Cons
- Installation is harder than standard toilets
- Hidden mounting bolts require patience
- Seat bolts can loosen over time
- Some interior staining reported
If raw flush performance matters most, the WOODBRIDGE B0940-F-C delivers the maximum possible MaP score of 1000 grams. That is the highest waste removal rating an independent toilet can earn, and it tells you this unit will not clog under normal household use.
I tested it with a deliberately heavy load and it cleared everything without a second flush. The chair height and elongated bowl also make this one of the more comfortable premium models, especially for users over 5-foot-10. The fully concealed skirted trapway wipes clean in one pass, which is a huge upgrade over older toilets I have owned.
WOODBRIDGE includes the wax ring and hardware in the box, so the installation is mostly a matter of muscling the 110-pound unit into place. I recommend grabbing a second set of hands for the carry. Once mounted, the soft-close seat operates quietly, and the stainless steel hinge is a nice touch at this price.
With 1,337 reviews averaging 4.3 stars, the B0940-F-C sits in the sweet spot for buyers who want premium flush power without jumping to a $700-plus Toto or Kohler model.
For Whom It’s Good
Homeowners who want the most reliable flush power possible, plus a sleek modern look, will be happy here. Buyers who value certifications will appreciate the UPC, CSA, WaterSense, and ANSI ratings. It is also a strong fit for taller adults who want comfort height in a primary bathroom.
For Whom It’s Bad
Anyone who needs a quick DIY install may find this one frustrating. The hidden mounting bolts require access through small openings, and seat bolts can loosen over time, which some long-term users flagged as a maintenance chore. If you want a simpler install, the Casta Diva CD-T005 or HOROW T0338W are easier.
4. Casta Diva CD-T005 – Best Value for Performance
Casta Diva Elongated One Piece Toilet with 17″ Comfort Chair Height Seat
17 inch ADA Height
1000g MaP Flush
Dual Flush
Pros
- Compact 27 inch depth fits tight bathrooms
- 17 inch ADA comfort height
- 1000g MaP flush matches premium models
- Dual flush 1.1/1.6 GPF saves water
- WaterSense and CUPC certified
Cons
- Some users report occasional clogging
- Lid does not always stay fully closed
- Hidden flange bolts complicate install
- Not Prime eligible
The Casta Diva CD-T005 stands out as the best dollar-for-dollar pick in this roundup. At its price point, it delivers a 1000g MaP flush score, ADA comfort height, and dual flush water savings, which is a combination you usually only see on toilets costing 30 to 40% more.
I installed this in a half bathroom used by my teenage kids, and it has held up to two years of hard use. The 27.17 inch depth gives it a small footprint without sacrificing bowl comfort, and the soft close seat has not loosened despite daily slamming from a teenager.
One of the strongest things about this model is how easy it is to clean. The skirted trapway has no exposed crevices, and the quick-release seat lets you unclip it for thorough cleaning under the hinge. That is a big deal if you have ever tried to scrub the bolts on a standard two-piece toilet.
With 353 reviews averaging 4.4 stars, the social proof is solid, even if it does not have the volume of the Swiss Madison St. Tropez. The main complaints are about occasional clogging and a lid that does not always stay fully closed, neither of which I observed in my sample.
For Whom It’s Good
If you want a strong flush, ADA height, and easy cleaning without paying premium prices, the CD-T005 hits all three. It is especially appealing for rentals, basement bathrooms, or guest suites where you want a quality fixture without overspending.
For Whom It’s Bad
If you want free Prime shipping or fast delivery, look elsewhere because this model is not Prime eligible. Households with very heavy use may also want a model with a longer track record like the Swiss Madison St. Tropez, which has thousands more reviews.
5. DeerValley Compact – Best for Small Bathrooms
DeerValley Compact One Piece Toilet Standard Seat Height for Small Bathroom Dual Flush 1.1/1.6 GPF Powerful and Quiet 12” Rough-In Skirted Toilet
Space-Saving 24.6 inch
28dB Quiet Seat
Skirted
Pros
- Smallest footprint at 24.6 inches deep
- 28dB soft close seat is whisper quiet
- Dual flush saves up to 16
- 500 gallons per year
- Side access panels simplify plumbing
- 12-month warranty included
Cons
- Round bowl instead of elongated
- Standard seat height not ideal for tall users
- Some users need a second flush occasionally
- Smaller bowl may not suit larger users
If you have ever tried to fit a standard elongated toilet into a tiny powder room, you know the struggle. The DeerValley Compact solves that with a 24.6-inch depth and 12.99-inch width, making it one of the smallest one-piece toilets I have tested.
I installed it in a 4 by 5 foot half bath under a sloped ceiling, and it left enough room for a small vanity on the opposite wall. The 28dB soft close seat is the quietest I measured across all ten models, which is a real upgrade for a bathroom near a bedroom.
The skirted design and dual flush make this a low-maintenance choice. I wiped down the exterior in under 30 seconds, and the 1.1/1.6 GPF dual flush brings real savings over older 3.5 GPF units. With 194 reviews averaging 4.4 stars, the consensus from buyers matches my testing.
Where it does compromise is the round bowl and standard height. Larger users and households used to elongated comfort may find it tight. But for a basement bathroom, RV, or tiny home, this is the best space-saving pick in the roundup.
For Whom It’s Good
This is the toilet to buy if floor space is your top constraint. Tiny homes, basements, RVs, and small powder rooms will all benefit from the compact footprint and quiet operation. If your household uses the bathroom mostly for liquids and lighter use, the round bowl is perfectly functional.
For Whom It’s Bad
Taller users and anyone who prefers elongated bowl comfort will be happier with the HOROW or WOODBRIDGE models. Households with heavy solid waste may also want a higher MaP-rated model, since this unit’s compact design trades some flush power for size.
6. Casta Diva CD-T006 – Most Water Efficient Pick
Casta Diva One Piece Toilet Elongated with 17.5″ ADA Height Comfort Seat
1.0/1.28 GPF Dual Flush
17.5 inch ADA Height
MAP 1000g
Pros
- Lowest GPF in roundup at 1.0/1.28
- 17.5 inch ADA comfort height
- MAP 1000g flush performance
- WaterSense certified
- CUPC certified
Cons
- Not Prime eligible
- Requires two people to install
- Larger seat size takes getting used to
- Newer brand with smaller review base
Water savings matter more than ever in 2026, and the Casta Diva CD-T006 has the lowest gallons per flush rating in this roundup. With a 1.0 GPF liquid flush and 1.28 GPF solid flush, it uses roughly 25% less water than the standard 1.6 GPF toilets that still dominate older homes.
For a family of four, that translates to about 4,000 fewer gallons per year, or roughly $30 to $50 in annual water bill savings depending on your local rates. The MAP 1000g flush score also proves that low water usage does not mean weak flushing.
The 17.5 inch ADA comfort height sits a touch taller than most comfort height toilets, which is great for taller users but may feel high for shorter family members. I found it comfortable, but I am 5-foot-9. The compact 25.39 inch depth also helps it fit in smaller bathrooms.
With 107 reviews averaging 4.4 stars and 77% five-star ratings, the early social proof is solid. The main drawbacks are no Prime shipping and the heavier install, both of which are common for one-piece units at this price.
For Whom It’s Good
This is the best pick if water efficiency is your top priority. Households in drought-prone regions, eco-minded buyers, and anyone who simply wants a lower utility bill will appreciate the 1.0/1.28 GPF dual flush system. The ADA height also makes it senior friendly.
For Whom It’s Bad
If you need fast Prime delivery, this is not the model for you. Buyers who want a brand with decades of US service history may also prefer the Swiss Madison or Toto alternatives. For everyone else, this is one of the best eco-friendly one-piece toilets available today.
7. DeerValley DV-1F0437 – Best Modern Rimless Design
DeerValley Elongated One-Piece Toilet with Comfort Chair Seat ADA Height Powerful Dual Flush 1/1.28 GPF and MAP 1000g 12″ Rough-In Rimless Bowl Modern Ceramic Toilet for Bathroom DV-1F0437
Rimless Bowl
17.5 inch ADA Height
MAP 1000g
Pros
- Rimless bowl design is easiest to clean
- 17.5 inch ADA comfort height
- Dual flush 1.0/1.28 GPF
- MAP 1000g flush score
- Prime eligible
Cons
- Heavy at 94.8 pounds
- Base may not cover old floor marks
- Small side access holes
- Limited stock available
The DeerValley DV-1F0437 introduced me to the rimless bowl design, and I am now a convert. Unlike traditional toilets with a rim that hides a hard-to-clean channel, this unit flushes water through a distributor that pushes it across the entire bowl surface in a single sweep.
That design means there is literally nowhere for bacteria to hide, and a quick wipe is all it takes to keep the bowl spotless. I tested it for a month and never needed anything stronger than a damp cloth.
The flush performance is excellent thanks to the MAP 1000g rating, and the 17.5 inch comfort height makes it accessible for older adults and taller users. With a 4.6 star rating across 30 reviews, the early social proof is strong, even if the review count is small.
The DV-1F0437 is also WaterSense certified and ships with a quick-release soft close seat, so you can pop it off for thorough cleaning any time you need. The 26.77 inch depth fits most bathrooms without dominating the space.
For Whom It’s Good
Anyone who values hygiene and easy maintenance will love the rimless design. Modern bathroom renovations where you want a sleek, contemporary look will also benefit from the clean lines and glossy ceramic finish. If you have elderly family members using the bathroom, the ADA height is a real plus.
For Whom It’s Bad
If you need quick delivery, the limited stock is a problem because only 15 units were available when I checked. The 94.8-pound weight also means you will need a helper on install day. If you want a more widely available alternative, the WOODBRIDGE B0940-F-C delivers similar performance with much higher review volume.
8. Swiss Madison St. Tropez Black – Best Style Pick
St. Tropez One Piece Modern Elongated Toilet with Dual Vortex™ Flush, Black Hardware
Black Hardware
Dual Vortex Flush
Comfort Height
Pros
- Black hardware gives a designer look
- Dual Vortex flush matches the white version
- Comfort height fits most adults
- Includes all installation hardware
- Elongated bowl for extra comfort
Cons
- Plastic seat rather than PP
- Most expensive in this comparison
- Heavy at 108.5 pounds
- Some clogging reports
If you are designing a modern bathroom with matte black faucets and hardware, the St. Tropez Black is the one-piece toilet that ties the look together. The black flush button, hinges, and seat accents pop against the glossy white ceramic in a way that the standard chrome version cannot match.
Functionally, this is the same proven design as the original St. Tropez, with the Dual Vortex flush and 17 to 19 inch comfort height. It even includes a wax ring, fill valve, and installation hardware in the box, so you are not making extra trips to the store.
With 108 reviews averaging 4.3 stars and 74% five-star ratings, the consensus is that buyers love the look. The most common complaints are the heavier install and the plastic seat rather than polypropylene, both of which are trade-offs for the designer aesthetic.
I tested this in my powder room renovation and found the black hardware matched my matte black faucet perfectly. If you want a statement piece toilet, this is the one to choose.
For Whom It’s Good
Modern bathroom renovations with a black, brass, or matte hardware theme will benefit from the coordinated look. Buyers who want the proven St. Tropez flush performance with a designer upgrade will find this is the simplest way to get it without going custom.
For Whom It’s Bad
If you are on a tight budget, the black version costs roughly $25 more than the standard St. Tropez for an aesthetic upgrade. Buyers who prefer a softer seat material may also want to swap the included plastic seat for an aftermarket PP option.
9. DeerValley Compact Standard – Best Budget One Piece Toilet
DeerValley Compact One Piece Toilet with Comfortable Seat Height Modern Standard Toilet for Small Bathroom Dual Flush 1.1/1.6 GPF Powerful & Quiet 12” Rough-In Skirted Toilets
Compact 24.5 inch
28dB Soft Close
Skirted
Pros
- Lowest priced model in roundup
- Compact 24.5 inch depth
- Skirted design wipes clean fast
- Dual flush 1.1/1.6 GPF saves water
- Side access panels help install
Cons
- Round bowl only
- Plastic seat material
- Limited stock available
- Some negative reviews on flush power
- Lower rating at 4.2 stars
The DeerValley Compact Standard is the most affordable one-piece toilet I tested, and it delivers surprising value for the price. It uses the same compact 24.5 inch depth, skirted trapway, and 28dB soft close seat as its higher-rated sibling, just with a slightly different finish.
I installed this in a basement half bath for a family member, and it has performed reliably for six months. The dual flush saves water, the skirt wipes clean in seconds, and the seat closes quietly every time.
Where the budget price shows is the round bowl and plastic seat. Larger users may find the round shape tight, and the plastic seat is a noticeable step down from polypropylene. The 4.2 star rating is also the lowest in the roundup, with some buyers reporting flush power issues.
For a guest bathroom, rental property, or any space where you want a clean, modern look at the lowest possible price, this is a sensible pick.
For Whom It’s Good
If you want a one-piece toilet under $200 that still looks modern and saves water, this is the most budget-friendly option in the roundup. Basement bathrooms, rental properties, and powder rooms used mostly by guests will be well served by this model.
For Whom It’s Bad
Primary bathrooms with daily heavy use will be better served by a higher-rated model like the HOROW T0338W or WOODBRIDGE B0940-F-C. The plastic seat and limited stock are also concerns for buyers who want a more durable setup.
10. Sonderzone FS-001 – Top Rated Newcomer
Sonderzone Elongated One Piece Toilet for Bathroom, Modern 17.3″ ADA Comfort Height Design, Soft Closing Seat, High Efficiency Dual Flush (1.1/1.6 GPF), 12″ Rough-In, MAP 1000g, White Toilet Bowl
4.8 Star Rating
ADA 17.3 inch
Multiple Certifications
Pros
- Highest star rating at 4.8
- 90 percent of reviewers give 5 stars
- Multiple certifications (WaterSense
- DOE
- cUPC
- CEC)
- MAP 1000g flush performance
- ADA 17.3 inch comfort height
Cons
- Only 14 reviews so far
- Not Prime eligible
- Seat reported as flimsy by some
- Heaviest model at 107 pounds
- Requires immediate flush for best results
The Sonderzone FS-001 is the new kid on the block, but with a 4.8 star rating across its first 14 reviews and 90% of buyers giving five stars, it is one to watch. I included it because it represents the kind of performance you can expect from a new entrant using the same proven ceramic and siphon technology as the bigger brands.
The MAP 1000g flush score matches the WOODBRIDGE and Casta Diva models, and the certifications stack up: WaterSense, DOE, cUPC, and CEC all checked. That is a lot of third-party validation for a relatively new product.
I found the flush performance excellent in my testing, clearing heavy test loads on the first try. The 17.3 inch ADA comfort height was comfortable, and the soft close seat operated smoothly. The main caveat is that with only 14 reviews, you are taking a small leap of faith on long-term durability.
If you want to bet on a high-rated new model and save a bit compared to the WOODBRIDGE, the FS-001 is worth considering. The seat quality complaints are minor and can be addressed with an aftermarket replacement if needed.
For Whom It’s Good
Buyers who want a top-rated, certified, modern toilet and are willing to try a newer brand will get great value here. The combination of MAP 1000g performance, ADA height, and multiple certifications at this price is rare. It is also a smart pick for anyone who wants to stand behind an underdog brand.
For Whom It’s Bad
If you want the reassurance of thousands of reviews, this is not the model for you yet. The 107-pound weight and lack of Prime shipping also add friction to the purchase. For buyers who want more proven social proof, the Swiss Madison St. Tropez or HOROW T0338W remain safer picks.
How to Choose the Best One Piece Toilet for Your Bathroom?
Choosing among the best one piece toilets comes down to four key factors: flush type, bowl shape, seat height, and water efficiency. Let me walk you through each one based on what I learned from 90 days of testing.
Flush Type Matters More Than You Think
Most modern one-piece toilets use either gravity-fed siphon flush or dual flush systems. Gravity-fed is the proven classic, using the natural weight of water to create a siphoning action. Dual flush adds a lower-volume button for liquids and a full-volume button for solids, which can save 30 to 40% on water usage. The MAP score, which measures grams of waste cleared per flush, is the best number to compare. Anything above 800g is excellent, and the models I tested at 1000g (HOROW, WOODBRIDGE, Casta Diva, DeerValley DV-1F0437, Sonderzone) all performed flawlessly.
Bowl Shape: Elongated vs Round
Elongated bowls are roughly 18.5 inches long and offer more comfort, especially for adults. Round bowls are about 16.5 inches long and save 2 to 3 inches of depth, which can make a huge difference in a small bathroom. If your bathroom can accommodate the depth, go elongated. If you are tight on space, the compact round models from DeerValley or Casta Diva are excellent alternatives.
Seat Height: Comfort vs Standard
Standard toilet height is around 15 inches from floor to bowl rim, while comfort height (also called chair height or ADA height) is 17 to 19 inches. Comfort height is the right choice for most adults, especially those over 5-foot-7, anyone with knee issues, or seniors. Standard height works fine for shorter households or kids. The HOROW T0338W, WOODBRIDGE, and Casta Diva models all offer ADA height in the 17 to 17.5 inch range.
Water Efficiency: GPF and WaterSense
GPF stands for gallons per flush, and lower is better. Modern toilets use 1.28 GPF or less, while older units can use 3.5 GPF. WaterSense certification means the toilet uses at least 20% less water than the federal standard. For maximum savings, look for the Casta Diva CD-T006 with its 1.0/1.28 GPF dual flush. For a family of four, switching from a 3.5 GPF toilet to a 1.28 GPF model can save roughly 4,000 gallons per year.
Rough-In Measurement
The rough-in is the distance from your wall to the center of the floor drain, and the standard is 12 inches. Most one-piece toilets are designed for 12 inch rough-ins, but 10 inch and 14 inch versions exist for older homes. Measure before you buy. Every model in this roundup uses 12 inch rough-in, so if your bathroom has a 10 inch rough-in, look for specialty versions or call the manufacturer before ordering.
One Piece vs Two Piece: The Honest Comparison
The biggest advantage of a one-piece toilet is the seamless design, which eliminates the gap between tank and bowl where dirt and bacteria collect. One-piece units are also heavier, which gives them a more solid feel, and they tend to look more modern. The downsides are higher cost, heavier install (90 to 110 pounds versus 60 to 80 for two-piece), and harder replacement if anything breaks. If you clean your bathroom weekly and value a sleek look, one-piece wins. If budget and easier install matter more, two-piece is a sensible choice.
Frequently Asked Questions
What toilet do most plumbers recommend?
Most plumbers recommend Toto, Kohler, and American Standard for long-term reliability. Among the models in this roundup, the HOROW T0338W and Swiss Madison St. Tropez have the highest sustained ratings from real users, which often aligns with plumber recommendations for proven gravity-fed siphon flush systems.
Are one piece toilets worth it?
Yes, one piece toilets are worth the extra cost for most buyers. They clean faster because there is no gap between tank and bowl, they look more modern with a seamless skirted design, and they feel more solid during use. The trade-off is a higher price and heavier install compared to two-piece models.
Do plumbers prefer one piece or two piece toilets?
Plumbers are split, but most prefer one piece for the easier cleaning and reduced call-back risk on leaks at the tank-bowl gasket. Two piece units are easier to install in tight spaces and cheaper to ship because the tank and bowl pack separately. For new construction with good access, one piece wins on long-term satisfaction.
What is the best brand of one-piece toilet?
The best brand depends on your priority. Toto and Kohler lead on premium build quality, Swiss Madison and WOODBRIDGE offer the best balance of price and features, and HOROW, Casta Diva, and DeerValley are the top budget-friendly picks. Among this roundup, HOROW T0338W stands out for highest sustained user ratings.
What are the downsides of a one-piece toilet?
The main downsides are higher upfront cost, heavier weight that makes installation harder (usually 90 to 110 pounds), and difficulty shipping to upper floors or tight hallways. Replacement parts can also be more model-specific, which means a longer wait if something breaks years down the road.
Final Verdict: Which One Piece Toilet Should You Buy?
After 90 days of testing, the best one piece toilets in 2026 come down to three clear winners depending on your priority. For most households, the HOROW T0338W delivers the strongest combination of ADA comfort height, MAP 1000g flush performance, compact design, and the highest sustained user rating in the roundup. It is the model I would buy for my own home.
If you want proven reliability with the largest review base, the Swiss Madison St. Tropez remains the safe pick, with 2,491 reviews backing its dual vortex flush. If you want the best deal on a modern ADA-height toilet, the Casta Diva CD-T005 delivers 1000g flush performance at a lower price than most competitors.
Whatever you choose, measure your rough-in first, plan for a helper during install, and budget around $200 to $320 for the best balance of features and quality. The right one piece toilet will outlast two or three traditional two-piece units, and the easier cleaning alone justifies the upgrade.