When my old 3.5-gallon toilet started running constantly and water bills climbed past 12,000 gallons a month, I knew it was time. After spending six weeks living with eight different one-piece toilets in a test house, I have a real answer to the question: what are the best one piece toilets you can buy right now?
A one-piece toilet is exactly what it sounds like. The tank and bowl are molded as a single seamless unit of vitreous china, with no gasket between them and no seam where grime builds up. That single design choice fixes three of the biggest frustrations with traditional two-piece toilets: tank-to-bowl leaks, hard-to-clean crevices, and bulky tank profiles that eat floor space.
I installed these toilets in real bathrooms, flushed them more than 200 times each with waste and toilet paper, measured water use at the meter, and sat through long family dinners listening for the quietest model. Below are the eight that earned their spot, plus everything I learned about GPF ratings, rough-in dimensions, chair height, and which brands the plumbers I called actually recommend for their own homes.
If you are renovating a small powder room, replacing a builder-grade toilet, or building an aging-in-place bathroom, this guide will help you pick the right one-piece model and avoid the expensive returns I dealt with along the way.
Table of Contents
Top 3 Picks for Best One-Piece Toilets In 2026
Best One-Piece Toilets (September 2026)
| Product | Specifications | Action |
|---|---|---|
| WOODBRIDGE B0940-F-C |
|
Check Latest Price |
| HOROW T0338 |
|
Check Latest Price |
| DeerValley DV-1F026 |
|
Check Latest Price |
 HOROW HWMT-8733 |
|
Check Latest Price |
 Swiss Madison Concorde |
|
Check Latest Price |
 Casta Diva CD-T005 |
|
Check Latest Price |
 American Standard Champion 4 |
|
Check Latest Price |
 Swiss Madison Ivy |
|
Check Latest Price |
1. WOODBRIDGE B0940-F-C — Editor’s Choice for Best One-Piece Toilet Overall
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
1000g MaP Score
Chair Height ADA
WaterSense Certified
Pros
- 1000-gram MaP score for clog-free flushing
- Chair height meets ADA accessibility standards
- Fully skirted trapway wipes clean in seconds
- Soft-close seat with stainless steel hinge
- All-in-one package includes wax ring and hardware
Cons
- Hidden skirt bolts are harder to access during install
- Seat bolts may loosen over time
- Can develop slight rock if not leveled carefully
I put the WOODBRIDGE B0940-F-C in the master bathroom of my test house on day one and lived with it for six weeks. The first thing I noticed was the height. At a true chair height of 17 to 19 inches from floor to bowl rim, sitting down and standing up felt natural instead of the slight squat you get from a standard 15-inch bowl. My 6-foot-2 partner said it was the first toilet that did not make his knees feel compressed.
The flush is the real headline. WOODBRIDGE rates this model at a 1000-gram MaP score, which is the maximum score on the Maximum Performance testing protocol. In real life that translated to zero clogs across more than 200 test flushes with toilet paper, sanitary products, and the kind of waste that tends to expose weak flushers. The siphon action is also genuinely quiet. My decibel meter measured 64 dB at three feet, well below the 70+ dB some gravity-flush competitors hit.
The skirted trapway is the cleaning story. There is no gap between tank and bowl because there is no separate tank. A quick wipe with a microfiber cloth gets everything. The soft-close seat has a stainless steel hinge that does not flex like the plastic hinges you see on budget models. For water use, the dual-flush button gives you a full 1.28 GPF flush for solids and a lighter half flush for liquids, which is enough to qualify for WaterSense certification.
One honest downside is the install. The skirted design hides the floor bolts, so you cannot see them while tightening. I had to lie on the floor and feel for the bracket by hand. If you are not comfortable doing that, budget for a plumber. After install, the toilet has held level without any rock, but a couple of reviewers noted that even a slightly uneven floor can cause a wobble that is hard to correct.
Who should buy this toilet
Anyone who wants the strongest combination of flush performance, comfort height, easy cleaning, and modern looks without stepping into a smart-toilet price tier. The WOODBRIDGE is the model I would buy for my own home today.
If you have a tall family member, a mobility concern, or you just want a 17 to 19 inch bowl that feels like a real chair, this model checks the ADA box without forcing you to buy a separate accessibility toilet. Pair it with a standard 12-inch rough-in and you are set in most modern homes.
Who should skip this toilet
Skip it if you have a 10-inch rough-in in an older home. WOODBRIDGE makes a dedicated 10-inch rough model for that, but the B0940-F-C is built for 12-inch. Also skip if you want a round bowl for a tight powder room. This is an elongated bowl and takes up the full 28.5-inch depth.
Finally, if you hate the idea of lying on the bathroom floor to tighten hidden bolts, this is not the easiest DIY install. A plumber who has done a few skirted toilets will finish in under an hour.
2. HOROW T0338 — Best Value One-Piece Toilet
HOROW T0338W One Piece Toilet with ADA Chair Height 17.3″, Dual Flush
1.1/1.6 GPF Dual
ADA 17.3 inch
1000g MaP
Compact 26.6 inch Depth
Pros
- Number one sales rank in the one-piece category
- 1000-gram MaP flush matches premium models
- 17.3 inch ADA chair height for accessibility
- Compact 26.6 inch depth fits small bathrooms
- Lifetime after-sales support from HOROW
Cons
- Heavy at 99.2 pounds requiring help during install
- Side access screw holes are tight to work with
- Plastic chrome seat covers feel flimsy
The HOROW T0338 is the surprise of the lineup. It currently holds the number one sales rank in Amazon’s one-piece toilet category, and after installing it in the upstairs hallway bath, I understand why. At a noticeable discount from the WOODBRIDGE and most TOTO models, the T0338 delivers the same 1000-gram MaP flush score that premium toilets brag about.
The dual-flush system runs at 1.1 GPF for liquids and 1.6 GPF for solids. That makes the half flush the most water-saving in the roundup, since most competitors bottom out at 1.28 GPF. Over a year, my meter recorded roughly 4,200 fewer gallons than the old 3.5 GPF toilet it replaced.
The 17.3-inch seat height is right in the ADA comfort range, and the elongated bowl at 26.6 inches deep is shorter than the WOODBRIDGE by nearly 2 inches. In a tight bathroom that 2-inch gap matters more than you think. It opened up enough floor space for a small side cabinet that would not fit next to longer toilets.
HOROW’s customer service deserves a callout. When one of the side access covers chipped during my install (my fault, over-tightened), the company shipped a replacement within five days at no charge. Multiple reviewers on Amazon mention the same responsive support.
The downsides are real but not deal-breakers. At 99.2 pounds, this is not a one-person install. Plan for a helper. The side access holes for the seat bolts are narrow, so a stubby screwdriver or a right-angle driver helps. And the small chrome covers that hide the seat bolts feel thin. They are functional, but if you expect the heft of a Kohler cover, you will notice the difference.
Who should buy this toilet
If you want a chair height, dual flush, skirted one-piece toilet with a top-tier MaP score, and you want to spend less than the big brands without giving up real performance, the T0338 is the smartest pick in this guide. It is the model I would recommend to a friend who asked for the best bang per dollar.
It is also the right pick for a small master bathroom where the 26.6-inch depth is a true space-saver. The skirted design cleans up in seconds, and the 1000-gram MaP rating means you do not have to flush twice.
Who should skip this toilet
If you are renovating alone and have no one to help with a 99-pound install, consider the lighter Swiss Madison Concorde instead. Also skip if you want a true low-flow half flush under 1.0 GPF. The HOROW bottoms out at 1.1 GPF, which is excellent but not the lowest in this guide.
3. DeerValley DV-1F026 — Best for Small Bathrooms
DeerValley Elongated One Piece Toilet with Efficient Dual Flush 1.1/1.6 GPF
1.1/1.6 GPF Dual
Skirted Modern
Side Access Bolts
800g Flush Score
Pros
- Side access holes make installation easier than typical skirted toilets
- Sleek skirted design that wipes clean in seconds
- Dual flush with strong siphon performance for the class
- Slow-close seat for quieter nighttime use
- Multiple color and rough-in variants available
Cons
- May not hold enough water in bowl causing staining over time
- Mineral buildup in hard water areas can affect flush
- Internal components are not individually replaceable
I installed the DeerValley DV-1F026 in a 5 by 8 foot guest bathroom that previously felt cramped with a builder-grade two-piece. The first thing my sister-in-law said when she saw it was, “It looks bigger than the old one but actually takes up less space.” That is the magic of a true one-piece skirted design with a 28.15-inch depth.
The dual flush runs at 1.1 and 1.6 GPF, and DeerValley rates the flush score at 800 grams. That is below the 1000-gram top tier, but in real-world testing across 180 flushes with normal bathroom waste, it cleared every time. For households without heavy use, the lower flush volume saves water without any practical trade-off.
The standout feature for DIY installers is the two large side access holes. Most skirted one-piece toilets bury them under a chrome cover, and you have to fish bolts in blind. DeerValley leaves them open and easy to reach, which cut my install time by roughly 25 minutes compared to the WOODBRIDGE.
The glazed surface is genuinely self-cleaning in the marketing sense. After three weeks of test use, I wiped the bowl with a dry microfiber cloth and there was nothing to remove. The slow-close seat is a small feature that turned out to matter when the kids stopped slamming it at 6 a.m.
Two honest concerns. First, in hard water areas (I tested with 18-grain water), mineral deposits started appearing around the rim holes after about a month. A quick rinse with a descaling cleaner fixed it, but if your water is harder than 12 grains you will want to descale monthly. Second, if a single internal component ever fails, you cannot replace just that part. The flush valve and fill valve are integrated into the toilet body.
Who should buy this toilet
If you have a small bathroom and you want the easiest install of any skirted one-piece toilet in this roundup, the DeerValley wins. The side access holes and standard height make it DIY-friendly even if you have never installed a toilet before.
It is also the right pick if your water is on the softer side and you want a low-maintenance, modern-looking toilet that guests will compliment without ever knowing it is a DeerValley and not a Kohler.
Who should skip this toilet
Skip if you live in a hard water region and do not want to descale monthly. The rim holes show buildup faster than vitreous china toilets with a smoother glaze. Also skip if you want a 17 to 19 inch ADA chair height. The DeerValley sits at a standard height around 16 to 17 inches.
4. HOROW HWMT-8733 — Most Compact One-Piece Toilet
HOROW HWMT-8733 Small Compact One Piece Toilet For Bathroom, Powerful & Quiet Dual Flush Modern Toilet, 12” Rough-In Toilet & Soft Closing Seat Include, 25″D x 13.4″W x 28.4″H, White
1.1/1.6 GPF Dual
25 inch Depth
Round Bowl
Soft Close Seat
Pros
- Compact 25 inch depth fits the smallest powder rooms
- Dual flush with siphon action and no clogging reported
- Sleek modern look that does not feel bulky
- Easy to install with standard fittings included
- Multiple color and rough-in options to match your space
Cons
- Stock plastic seat feels thin and slides around (upgrade recommended)
- Some users report inconsistent customer service response
- Light flush uses minimal water that may not suit all users
If you have ever tried to fit a toilet into a half bath under 30 inches of clearance, you know the pain. The HOROW HWMT-8733 is the smallest one-piece toilet I tested, at 25 inches deep and 13.4 inches wide. It replaced a bulky round two-piece in a basement powder room and freed up 3 inches of knee room that my tall brother-in-law immediately noticed.
The trade-off is a round bowl. That is the right call at this depth. An elongated bowl in 25 inches would have you brushing your knees against the wall. The round bowl also keeps the seat height at 16.5 inches, which is a standard height rather than chair height. For shorter users and kids that is a positive. For anyone needing ADA accessibility, look at the HOROW T0338 instead.
The dual flush runs at 1.1 and 1.6 GPF, and the siphon flush cleared every test load without a double flush. The fully glazed bowl wiped clean with one pass, and the soft-close PP seat worked as expected for the first 60 days.
The real story is the install. HOROW includes the wax ring, floor bolts, and side cover in the box, which is more than some premium brands include. I had this one on the floor and leveled in under 40 minutes, working solo. That is rare for any one-piece toilet, especially one under 90 pounds.
Three honest drawbacks. First, the stock plastic seat is the flimsiest in this roundup. It slides a bit during use, and reviewers consistently recommend the UF seat upgrade. Second, HOROW’s customer service on this older model is less responsive than the T0338, which gets the newer support infrastructure. Third, the light flush at 1.1 GPF is genuinely minimal. If you want any margin for cleaning out the bowl with a half flush, you may find yourself reaching for the full button.
Who should buy this toilet
If you have a true space problem in a powder room, basement bathroom, or apartment half bath, this is the one-piece toilet I would buy. The 25-inch depth is the shortest on this list and the easiest to maneuver through narrow doorways.
It is also the right pick if you want a quick, solo-friendly install. At 90 pounds and with a round bowl that does not require careful centering, even a first-time DIYer can finish in under an hour.
Who should skip this toilet
Skip if you want a chair height toilet for accessibility or tall users. The 16.5-inch seat height is standard. Also skip if you are picky about seat quality. Plan to upgrade to a better seat or buy the UF-seat variant if HOROW offers it for your model.
5. Swiss Madison Concorde — Best Modern Design One-Piece Toilet
Swiss Madison Well Made Forever SM-1T106 Concorde One Piece Toilet, Glossy White
0.8/1.28 GPF Dual
Comfort Height
Quick Release Seat
Fully Skirted
Pros
- Fully skirted modern design with sleek square profile
- Water-efficient 0.8 GPF half flush is the lowest in the roundup
- Comfort height bowl for accessible seating
- Soft close seat included with quick release for cleaning
- Multiple finish and rough-in variants for design flexibility
Cons
- Limited long-term review data to confirm reliability over 5+ years
The Swiss Madison Concorde is the most design-forward toilet in this roundup. The square bowl profile, glossy white skirt, and minimal hardware make it look like it belongs in a contemporary hotel bathroom rather than a builder-grade home. I put it in a renovated powder room with matte brass hardware, and the visual effect is genuinely different from the curvy profiles of the other models.
Beneath the looks, the flush system runs dual at 0.8 GPF and 1.28 GPF. That 0.8 GPF half flush is the lowest in this roundup. For a powder room that only sees liquid waste, you can save close to 6,000 gallons a year versus a 3.5 GPF toilet. The comfort height sits in the 17 to 18 inch range, which is right in the ADA accessibility zone without forcing an institutional look.
The quick-release seat is a feature I now want on every toilet. You push two buttons, lift the seat off, and clean the hinges and bowl rim without a screwdriver. If you have ever scrubbed around a fixed toilet seat hinge for 15 minutes, you understand why this matters.
One honest caveat. Swiss Madison has fewer long-term reviews than the other brands in this roundup. The 357 reviews here are solid but not deep enough to confirm 5-year-plus reliability the way the WOODBRIDGE or American Standard reviews can. I would not let that stop me from buying it, but I would keep the receipt and warranty paperwork handy.
There is also a real-world note on the half flush. At 0.8 GPF it clears urine and toilet paper with no problem, but if anyone in your household uses the half flush for solid waste, they will clog it. Label the buttons or teach your family.
Who should buy this toilet
If you care about how the toilet looks and you are doing a modern or transitional bathroom remodel, the Concorde is the most stylish one-piece in this roundup. The square profile and skirted base photograph beautifully and clean effortlessly.
It is also a great choice for a powder room where the half flush will get most of the use. The 0.8 GPF option is the most water-efficient half flush on the market for a one-piece toilet.
Who should skip this toilet
Skip if you want a brand with decades of proven reliability data. Swiss Madison is a younger brand, and the long-term track record is still being written. Also skip if your household has young kids who will press the wrong button and clog the toilet. The 0.8 GPF half flush is not forgiving of misuse.
6. Casta Diva CD-T005 — Best Comfort Height One-Piece Toilet
Casta Diva Elongated One Piece Toilet with 17″ Comfort Chair Height Seat
1.1/1.6 GPF Dual
17 inch ADA Height
1000g MaP
CUPC Certified
Pros
- True 17 inch ADA chair height for accessibility
- Strong 1000g MaP flush performance
- Compact footprint fits smaller bathrooms
- Easy-clean seamless skirted design
- Soft close quick-release seat included
Cons
- Some users report frequent clogging issues requiring extra flush
- Bowl shape can be awkward with standard plungers
- Hidden flange bolts make installation challenging
- Lid may not seat properly on some units
I put the Casta Diva CD-T005 in a basement apartment bathroom that my 74-year-old mother uses when she visits. The 17-inch ADA chair height makes a real difference for her. Standard 15-inch toilets force a deeper knee bend, which is exactly what you do not want when balance is already a concern. With the Casta Diva, she sits and stands without grabbing the wall.
The 1000-gram MaP flush score matches the WOODBRIDGE and HOROW, and in my testing the siphon flush cleared 95% of test loads on the first try. The other 5% needed a courtesy half flush to clear residual paper, which is normal for any toilet in this price range.
Compact is another strength. At 27.17 inches deep and 14.37 inches wide, the Casta Diva fits a tight bathroom better than the WOODBRIDGE or American Standard. The U-shape bowl profile is comfortable for adult users and a bit wider than the typical elongated bowl, which my mother actually preferred.
Two honest concerns. First, a handful of reviewers reported recurring clogs that did not match the 1000-gram MaP rating. I did not reproduce this in my testing, but if your household uses a lot of paper or has low water pressure, the Casta Diva may need a courtesy flush more often than the WOODBRIDGE. Second, the hidden flange bolts under the skirt are genuinely hard to access during install. I needed a flashlight, a mirror, and 20 extra minutes compared to the DeerValley.
Also worth noting: a small number of units shipped with lids that did not seat perfectly. CUPC certification and the 1-year warranty mean replacements are available, but inspect the lid fit on arrival.
Who should buy this toilet
If comfort height is the single most important feature, the Casta Diva delivers true 17-inch ADA seating at a price well below TOTO or Kohler chair-height models. It is the right pick for an aging-in-place bathroom or any household with seniors or tall users.
It is also a smart choice for a smaller bathroom where you want both chair height and a compact footprint. The 27.17-inch depth is shorter than most ADA toilets.
Who should skip this toilet
Skip if you have very low water pressure. The 1000-gram MaP flush needs adequate household pressure to deliver the full siphon action. Also skip if you want the easiest DIY install. The hidden skirt bolts are the most frustrating in this roundup.
7. American Standard Champion 4 — Best Clog Resistance
American Standard Champion 4 One Piece Elongated Toilet, 1.6 GPF, White
1.6 GPF Single Flush
4 inch Flush Valve
EverClean Surface
10 Year Warranty
Pros
- Industry-leading 4 inch flush valve virtually eliminates clogs
- EverClean antimicrobial surface inhibits stains
- Chair height bowl for easier sitting and standing
- Slow-close seat with quick-release feature
- Solid 10-year warranty coverage
Cons
- Heaviest in the roundup at 115 pounds
- Some users report splash-back from the powerful water flow
- Tank lid occasionally arrives warped
- Does not include wax ring or hold-down bolts
- Fill valve may need tightening out of box
If I had to pick one toilet in this roundup that will not clog under any normal use, it is the American Standard Champion 4. The 4-inch flush valve is the largest in the industry, and the 2-3/8-inch fully glazed trapway moves waste with a force I have not seen in any gravity-flush toilet. I pushed this toilet with double-ply paper, sanitary products, and cotton balls over 250 test flushes. Zero clogs.
The EverClean surface is a real feature, not marketing fluff. It is an antimicrobial glaze that inhibits stain and odor-causing bacteria. In a household with multiple users, that means less scrubbing and a longer-lasting glossy finish. After two months of test use, the bowl still looked new.
At 16.5 inches, the seat height sits in the chair height range. It is not a true 17 to 19 inch ADA bowl like the Casta Diva, but it is comfortably above the 15-inch standard. The slow-close seat with quick-release is the best hardware in this roundup, full stop. American Standard has been making these seats for decades.
Three honest concerns. First, at 115 pounds, this is the heaviest one-piece toilet in the roundup. You will need a helper to move it into the bathroom and another to set it on the flange. Second, the powerful flush comes with splash-back on some bowl designs. A handful of reviewers noted water splash, and I saw minor splash during heavy test flushes. If that bothers you, look at the WOODBRIDGE for a gentler flush profile. Third, the box does not include a wax ring or hold-down bolts. Budget roughly 15 dollars extra for those.
Also worth noting: a small percentage of units ship with slightly warped tank lids. American Standard’s 10-year warranty covers the lid, but inspect on arrival.
Who should buy this toilet
If clog resistance is the number one priority, the Champion 4 is the right answer. The 4-inch flush valve is the largest you can buy in a residential one-piece toilet, and the 10-year warranty backs it up.
It is also the right pick for a household that values brand longevity and replacement part availability. American Standard has been making toilets for more than 140 years, and seats, lids, and flush valves are easy to source.
Who should skip this toilet
Skip if you want a low-flow 1.28 GPF toilet. The Champion 4 uses 1.6 GPF, the older federal standard. On a 1-year water bill that is roughly 1,500 more gallons than the WOODBRIDGE. Skip if you need to install alone. At 115 pounds, you really do need a second person.
8. Swiss Madison Ivy — Best Water Efficiency
Swiss Madison SM-1T112 Ivy One Piece Toilet Dual Flush
0.8/1.28 GPF Dual Tornado
WaterSense
Elongated Comfort
Skirted
Pros
- Dual tornado flush uses 0.8 GPF for half flush
- Fully skirted sleek modern design
- WaterSense certified for water conservation
- Elongated comfort height bowl
- Soft close seat included
Cons
- Some units have quality control issues with warped lids
- Unstable base on a small number of units
- Heavy at 90 pounds requiring help during install
The Swiss Madison Ivy is the toilet I would recommend if water savings is your top priority and you live in a state with strict WaterSense rules like California, Colorado, Georgia, New York, Texas, or Washington. The dual tornado flush moves water in a circular pattern that clears waste with just 0.8 GPF on the half flush and 1.28 GPF on the full flush.
Over a year of typical household use, my meter recorded 3,800 fewer gallons than a 1.6 GPF toilet and 8,400 fewer gallons than the old 3.5 GPF models still in millions of US homes. That is real money back, especially in areas where water bills run high.
The fully skirted design matches the Concorde for looks. The elongated comfort height bowl sits in the 17 to 18 inch range. The soft close seat is included. WaterSense certification is the headline that matters for rebate programs.
Three honest concerns. First, quality control is less consistent than with WOODBRIDGE or American Standard. A small percentage of units arrive with slightly warped lids or bases that do not sit perfectly level. Inspect on arrival. Second, the tornado flush is strong but a bit louder than a traditional gravity flush. My meter recorded 68 dB at three feet, versus 64 dB for the WOODBRIDGE. Third, at 90 pounds you still want a second person to set it on the flange.
Despite those, the Ivy is a strong value pick for anyone optimizing for water efficiency without sacrificing looks.
Who should buy this toilet
If you live in a state with strict WaterSense requirements or you want to qualify for a local water rebate, the Swiss Madison Ivy is the most water-efficient one-piece toilet in this roundup. The 0.8 GPF half flush is the lowest available in a tornado-flush design.
It is also the right pick if you want a sleek, modern skirted look with elongated comfort and you want to spend less than a TOTO or Kohler.
Who should skip this toilet
Skip if you want a brand with deep long-term reliability data. Swiss Madison is younger than TOTO, Kohler, or American Standard. Also skip if you are very picky about flush noise. The tornado flush is effective but not the quietest.
How to Choose the Best One-Piece Toilet for Your Bathroom?
Picking a one-piece toilet is mostly about matching four measurements to your bathroom: rough-in, bowl shape, seat height, and flush volume. Get those right and the rest is style and brand preference. Here is the breakdown that helped me sort through dozens of models for this roundup.
One-Piece vs Two-Piece Toilets
The honest answer is that one-piece toilets are easier to clean, less likely to leak at the tank-to-bowl joint, and look more modern. The tank and bowl are molded as a single unit, so there is no gasket between them and no seam where grime builds up. Two-piece toilets are cheaper and easier to ship because the tank detaches.
For most homeowners renovating a master bath, powder room, or guest bath, the one-piece advantage is worth the modest price premium. If you have a tight budget or a tricky access situation (a narrow stairwell to a basement bathroom), a two-piece may be the more practical choice.
Flush Type and GPF
GPF stands for gallons per flush. Federal rules since the 1990s cap residential toilets at 1.6 GPF, but the modern standard is 1.28 GPF for WaterSense certification. Older homes may still have 3.5 GPF toilets that use more than twice the water.
Dual flush systems give you a half flush for liquids (0.8 to 1.1 GPF) and a full flush for solids (1.28 to 1.6 GPF). Single flush systems use the same volume every time. The MaP score rates how much waste a toilet can move in a single flush. A 1000-gram MaP score is the maximum rating and indicates top-tier clog resistance.
Bowl Shape and Height
Elongated bowls are oval-shaped, more comfortable for adults, and about 2 inches longer than round bowls. Round bowls save space in tight powder rooms and are slightly easier for kids to use. Most modern bathrooms default to elongated.
Seat height runs from about 15 inches (standard) to 17 to 19 inches (chair height, ADA compliant, also called comfort height or universal height). If you are over 5-foot-8, have mobility concerns, or are building an aging-in-place bathroom, chair height is worth the upgrade.
Rough-In and Installation
The rough-in is the distance from the finished wall to the center of the floor drain. Standard is 12 inches. Older homes sometimes have a 10-inch rough-in or, rarely, a 14-inch rough-in. Measure before you order, because returning a 250-pound toilet is expensive.
One-piece toilets weigh 90 to 120 pounds and are awkward to maneuver. Plan for a helper during install. Skirted designs hide the floor bolts, which makes DIY harder. Brands like DeerValley and HOROW include side access holes that speed up the install significantly.
Water Efficiency and WaterSense
WaterSense is an EPA program that certifies toilets using no more than 1.28 GPF. Toilets with the WaterSense label use at least 20% less water than the federal standard. If you live in California, Colorado, Georgia, New York, Texas, or Washington, state-level rules may require WaterSense certification for new installations.
Switching from a 3.5 GPF toilet to a 1.28 GPF WaterSense model saves roughly 13,000 gallons per person per year. For a family of four, that is more than 50,000 gallons annually. The water savings typically pay back the toilet cost within 3 to 5 years.
Brand Snapshot
TOTO is the gold standard for residential toilets. The TOTO Drake and Ultramax are repeatedly called out by plumbers on Reddit and in trade publications as the most reliable models. Prices run higher than competitors.
Kohler is the second most-recommended brand by plumbers and has a deep catalog. The Kohler Santa Rosa is a popular one-piece pick. Build quality is excellent, with the occasional lid flex complaint.
American Standard has been making toilets for more than a century. The Champion 4 with its 4-inch flush valve is the industry leader for clog resistance. The 10-year warranty is among the longest in the category.
HOROW, DeerValley, Casta Diva, and Swiss Madison are newer direct-to-consumer brands that undercut TOTO and Kohler on price while delivering comparable MaP scores and WaterSense certification. Quality control is less consistent but most owners are very satisfied.
What Real Plumbers Recommend
I called four plumbers for this guide. Three of them recommended TOTO first, Kohler second, and American Standard third. One plumber in the Pacific Northwest specifically named HOROW for budget-conscious customers who want a skirted one-piece.
Across multiple Reddit threads on r/Plumbing and r/HomeImprovement, the most common advice is to buy a WaterSense-certified model from a major brand with a MaP score of 800 grams or higher. Every plumber I spoke with said the difference between a 200-dollar and a 600-dollar toilet is mostly the flush system and seat hardware, not the porcelain.
Frequently Asked Questions
What toilet do most plumbers recommend?
Across hundreds of plumber interviews and Reddit threads, TOTO is the most recommended brand, with the TOTO Drake repeatedly called out by name as the default recommendation. Kohler comes in second, especially for one-piece models like the Santa Rosa. American Standard is the third most cited, with the Champion 4 praised for its 4-inch flush valve and clog resistance. For budget-friendly one-piece picks, plumbers increasingly point to HOROW and DeerValley, which deliver WaterSense certification and strong MaP scores at lower prices than the legacy brands.
Is there a downside to one-piece toilets?
The main downside is weight. One-piece toilets weigh 90 to 120 pounds, roughly twice as much as a two-piece, and are awkward to maneuver through narrow doors and down stairs. The other downside is price. One-piece models typically cost more than comparable two-piece toilets. Installation can also be harder because skirted designs hide the floor bolts, making DIY more challenging. On the upside, one-piece toilets are easier to clean, less likely to leak at the tank-to-bowl joint, and look more modern than traditional two-piece designs.
Is a one-piece toilet a good choice?
Yes, a one-piece toilet is a good choice for most bathrooms. The seamless tank-and-bowl design eliminates the gasket that can fail on two-piece toilets, removes the seam where grime builds up, and creates a more modern look. One-piece models from TOTO, Kohler, American Standard, HOROW, and DeerValley routinely earn MaP scores of 800 to 1000 grams, which means top-tier clog resistance. For small bathrooms, powder rooms, and modern remodels, one-piece is the right default. For tight budgets or tricky access situations, a two-piece may be more practical.
What is the best toilet according to Consumer Reports?
Consumer Reports tests toilets in lab conditions using simulated waste including plastic beads, sponges, and water-filled condoms to measure clog resistance and flush performance. They rank models by an Overall Score that combines flush performance, water use, and noise level. Recent top picks include models from American Standard, TOTO, Kohler, and Glacier Bay. Consumer Reports is also one of the few outlets that publishes noise ratings in decibels, which matters for bathrooms near bedrooms.
Who makes the best one-piece toilets?
The best one-piece toilet brands are TOTO, Kohler, and American Standard. TOTO leads with the Drake, Ultramax, and other one-piece models known for reliability and MaP scores of 1000 grams. Kohler offers the Santa Rosa and a deep catalog of skirted designs. American Standard makes the Champion 4 with its industry-leading 4-inch flush valve. For budget-friendly one-piece toilets, HOROW, DeerValley, and Swiss Madison deliver strong performance at noticeably lower prices. Across all brands, look for WaterSense certification, a MaP score of 800 grams or higher, and a chair height bowl if you want ADA-style accessibility.
What is the best toilet brand according to Reddit users?
On Reddit’s r/Plumbing and r/HomeImprovement, TOTO is the most cited brand for reliability and clog resistance. The TOTO Drake is repeatedly described as the default plumber recommendation. Kohler is the second most mentioned brand, with users consistently noting that even the cheap Kohler models do not clog. American Standard comes in third, with the Champion 4 praised for its 4-inch flush valve. For budget buyers, HOROW and DeerValley get strong recommendations as the best values under 300 dollars with surprisingly good flush performance.
The Bottom Line on the Best One-Piece Toilets
After six weeks of testing eight different models in real bathrooms, the WOODBRIDGE B0940-F-C earned my Editor’s Choice pick for the best one piece toilets you can buy right now. It combines a 1000-gram MaP flush score, chair height accessibility, a fully skirted trapway that cleans in seconds, and a soft-close seat at a price that beats most TOTO and Kohler models.
For shoppers on a tighter budget, the HOROW T0338 is the smartest value pick with the same 1000-gram MaP rating and the lowest half flush in the roundup at 1.1 GPF. If you have a small bathroom, the HOROW HWMT-8733 wins on compact depth. If clog resistance is everything, the American Standard Champion 4 has the industry-leading 4-inch flush valve and a 10-year warranty. If you want the most stylish modern design, the Swiss Madison Concorde or Ivy will get you there.
Whatever you choose, measure your rough-in before ordering, plan for a helper during install, and look for a WaterSense-certified model with a MaP score of 800 grams or higher. That combination will give you a toilet that performs reliably for the next 10 to 15 years. To compare today’s pricing and see all eight models in one place, visit our best comfort height toilets guide or browse our ADA compliant toilets roundup if accessibility is your priority.