10 Best One Piece Toilets (July 2026) Reviews and Buying Guide

Replacing an old toilet is one of those bathroom upgrades that pays off every single day. Our team spent weeks researching the best one piece toilets on the market, comparing flush power, water efficiency, comfort height, and ease of cleaning across 10 top-rated models. Whether you are renovating a master bathroom or upgrading a tight powder room, a one-piece design eliminates the gap between tank and bowl where grime loves to hide.

One-piece toilets cost a bit more than their two-piece counterparts, but they make up for it with easier cleaning, a sleeker look, and fewer leak points. Most models we tested feature skirted trapways, dual-flush systems, and soft-close seats that come included in the box. The flushing technology has also come a long way, with MaP scores of 1000 grams now common even at budget price points.

In this guide, we break down the best one piece toilets available in 2026, covering everything from the WOODBRIDGE dual-flush to the HOROW compact model and the American Standard Champion 4. We also included a detailed buying guide covering rough-in measurements, bowl shapes, GPF ratings, and ADA compliance so you can make the right choice for your bathroom.

Top 3 Picks for Best One Piece Toilets (July 2026)

If you want the short version, here are our three top recommendations. These stood out across flush performance, value, and user satisfaction after reviewing all 10 models.

Best One Piece Toilets in 2026

Here is a side-by-side comparison of all 10 models we reviewed. Use this table to quickly compare features, ratings, and key specifications before diving into the individual reviews.

1. WOODBRIDGE B0940 – Best Overall One Piece Toilet

The WOODBRIDGE B0940 is the one I recommend to most people asking about the best one piece toilets. It hits a sweet spot between price, performance, and design that few competitors can match. The 1000-gram MaP flushing score means it handles solid waste in a single flush without hesitation, and the dual-flush system lets you choose 1.0 GPF for liquids to save water.

What sets this model apart is the fully skirted, concealed trapway. There are no nooks or crevices on the exterior, which makes wiping down the bowl about as fast as it gets. The porcelain has a smooth, glossy finish that resists staining, and the chrome button on top adds a nice modern touch.

I also appreciate that WOODBRIDGE includes everything in the box: the toilet, pre-installed soft-close seat, wax ring, floor bolts, water fitting, installation instructions, and even a special hand wrench tool for the hidden bolts. The chair height design at 17 to 19 inches meets ADA requirements, making it comfortable for taller users and seniors.

The main drawback is installation. Because the trapway is fully concealed, the mounting bolts are hidden behind the skirt. You have to reach through access holes to tighten them, which can be frustrating if you have large hands. Many reviewers ended up hiring a plumber for this step.

Who This Toilet Works Best For

This is the ideal pick for homeowners who want a premium-looking one-piece toilet without paying $500 or more. The WOODBRIDGE fits beautifully in modern and transitional bathrooms, and the dual-flush system helps cut down on water bills over time. If you have a 12-inch rough-in and standard bathroom dimensions, this model checks every box.

It is also a great choice for families. The powerful flush means fewer clogs, and the skirted design means kids can help clean without struggling with crevices. Multiple reviewers reported buying a second or third WOODBRIDGE after being impressed with the first one.

2. HOROW T0338W – Best Compact One Piece Toilet for Small Bathrooms

The HOROW T0338W is the number one best seller in the one-piece toilet category on Amazon, and after looking closely at the specs and reviews, I can see why. At just 26.6 inches deep and 26 inches tall, it is one of the most compact elongated one-piece toilets you can buy. That makes it the go-to choice for small bathrooms, half-baths, and powder rooms where every inch matters.

Despite the compact size, HOROW did not skimp on comfort. The seat height of 17.3 inches meets ADA chair height requirements, so taller users and anyone with mobility concerns will find it comfortable. The elongated bowl gives you more seating surface than a round bowl without adding much depth.

The dual-flush system gives you 1.1 GPF for liquid waste and 1.6 GPF for solid waste. The siphon flush uses a fully-glazed 2-inch trapway to move waste efficiently. Most reviewers report solid flush performance, though a few noted it is adequate rather than exceptional for heavy solid waste loads.

Installation is where things get a bit tricky. The water inlet connection is hidden inside the back of the tank, so you must connect the supply line before positioning the toilet against the wall. The side access holes for bolt tightening are on the smaller side. HOROW does include larger side access openings than many competitors, which helps.

Who This Toilet Works Best For

If you are working with a small bathroom, this is your top pick. The compact footprint saves valuable floor space without sacrificing the comfort of an elongated bowl and ADA-height seating. It is also an excellent choice for guest bathrooms and basement half-baths.

HOROW backs this model with lifetime after-sales support and a 1-year warranty. Their customer service team gets consistent praise in reviews for being responsive and helpful when issues arise. At its price point, this is one of the best values in the one-piece toilet market.

3. DeerValley DV-1F026 – Best Budget One Piece Toilet

The DeerValley DV-1F026 proves you do not need to spend a fortune to get a quality one-piece toilet. At around $219, it delivers a skirted design, dual-flush system, and soft-close seat that compete with models costing twice as much. If you are outfitting multiple bathrooms or working with a tight renovation budget, this is where I would start looking.

The dual-flush system is rated at 1.1 GPF for liquids and 1.6 GPF for solids. DeerValley claims water savings of up to 16,500 gallons per year compared to older 3.5 GPF toilets. The premium glazed ceramic surface resists stains, scratches, and yellowing, which keeps the bowl looking clean longer between scrubbing sessions.

One feature that sets the DeerValley apart from other budget options is the large side access holes for installation. Many skirted one-piece toilets have tiny openings that make tightening mounting bolts a nightmare. DeerValley made these openings larger, which makes DIY installation significantly more manageable for homeowners.

The main trade-off is the seat height. At 16 and 7/8 inches, this is a standard height toilet, not an ADA-compliant chair height model. Taller users may find it slightly low. Also, the 12-month warranty is shorter than what premium brands like American Standard offer.

Who This Toilet Works Best For

Budget-conscious buyers get the most value here. If you need a one-piece toilet for a rental property, guest bathroom, or multi-unit renovation, the DeerValley delivers reliable performance without breaking the bank. The skirted design and dual-flush system are features usually reserved for mid-range models.

Multiple reviewers mentioned buying two or three of these for whole-home renovations and being satisfied with every installation. The lifetime after-sales service provides some peace of mind even beyond the warranty period.

4. Swiss Madison St. Tropez SM-1T254 – Best Mid-Range Dual Flush

The Swiss Madison St. Tropez is the most reviewed toilet in this roundup with 2,478 customer reviews, and it earned a 4.3-star average rating. That large review base gives you solid data on long-term reliability and performance. The standout feature here is the Vortex dual-flush system, which creates a cyclonic rinsing action that cleans the bowl more thoroughly than a standard gravity flush.

I like the comfort height design, which puts the seat between 17 and 19 inches tall. This makes sitting down and standing up noticeably easier, especially for older adults or anyone with knee issues. The elongated bowl provides comfortable seating, and the fully glazed skirted trapway means the exterior wipes clean in seconds.

The quick-release soft-close seat is a nice detail. You can pop the seat off for deep cleaning without tools, which is handy if you have kids or pets. Swiss Madison offers this model in glossy white, matte white, glossy black, and matte black finishes, plus 10-inch, 12-inch, and 14-inch rough-in options.

On the downside, some reviewers report waste sticking to the bowl interior, requiring more frequent brushing. The side access holes for installation are 3 inches in diameter, which is adequate but still tighter than the DeerValley. A few customers noted quality control issues like tank lid gaps and uneven fits.

Who This Toilet Works Best For

This model shines in modern and contemporary bathrooms where design matters as much as function. The range of color options means you can coordinate with black fixtures or matte finishes. If you want a comfort-height toilet with proven reliability across thousands of installations, the St. Tropez is a safe bet.

The Vortex flush technology is especially good for households concerned about bowl cleanliness between scrubbings. The cyclonic action rinses the bowl walls more effectively than standard gravity flush systems.

5. American Standard Champion 4 – Best Premium Pick

The American Standard Champion 4 is the tank of this lineup, literally and figuratively. Its 4-inch flush valve is the largest in the industry, and combined with the 2-3/8 inch fully-glazed trapway, it moves an enormous volume of water fast. That translates to clog-free performance that no other toilet in this roundup can quite match.

This is a 1.6 GPF single-flush model, so it uses more water per flush than the dual-flush options. But what you lose in water savings, you gain in raw flushing power. The Champion 4 system is designed to handle large waste volumes without hesitation, making it ideal for high-traffic family bathrooms.

The EverClean surface is a proprietary antimicrobial glaze that inhibits the growth of stain and odor-causing bacteria on the surface. This keeps the bowl cleaner between scrubbings and reduces the frequency of deep cleaning. The slow-close seat eliminates slamming, and the chrome trip lever has a solid, quality feel.

The biggest selling point may be the 10-year limited warranty, which is the best coverage in this roundup. American Standard is a legacy brand with a reputation for durability, and many reviewers mentioned buying multiple Champion 4 units for whole-home replacements. The main downside is the price, which is nearly double the mid-range options.

Who This Toilet Works Best For

If clog-free performance is your top priority and budget is secondary, the Champion 4 is the clear winner. It is built for busy households where the toilet gets heavy daily use. The EverClean surface and 10-year warranty make it a long-term investment that pays off in reduced maintenance.

This is also the best choice for buyers who trust established brands. American Standard has been making plumbing fixtures for over 150 years, and their parts and service network is extensive. If something breaks in year 7, you can actually get replacement parts.

6. Casta Diva CD-T006 – Best High-Efficiency Compact Toilet

The Casta Diva CD-T006 is the most water-efficient toilet in this roundup. Its dual-flush system uses just 1.0 GPF for liquids and 1.28 GPF for solids, both of which meet EPA WaterSense criteria. Despite the low water usage, it still achieves a MaP score of 1000 grams, meaning it can clear solid waste in a single flush.

At 25.39 inches deep and 26.57 inches tall, this is one of the most compact one-piece toilets available with an elongated bowl. The ADA-compliant 17.5-inch comfort height makes it accessible for seniors and anyone who struggles with low seats. The skirted, seamless design has no external crevices, so cleaning is quick.

The soft-close quick-release seat operates quietly and can be removed for deep cleaning without tools. The siphon jet flush system is designed for one-flush cleaning performance, and reviewers consistently praise how quietly it operates compared to older toilets.

Installation follows the same pattern as most skirted one-piece toilets. The side mounting openings can be small and difficult to reach with larger hands. Some reviewers noted the seat cover screw instructions had incorrect orientation, which is a minor but frustrating issue during assembly.

Who This Toilet Works Best For

Anyone who prioritizes water conservation should have this model on their short list. The 1.0 GPF partial flush is among the lowest available, which translates to real savings on water bills over time. The compact dimensions also make it suitable for smaller bathrooms where space is tight.

With a 4.7-star rating from early reviewers, the Casta Diva is earning strong marks for modern aesthetics, flush power, and comfort. The CUPC certification and 1-year warranty provide reasonable coverage for the price.

7. HOROW HR-ST076WD – Best Flapper-Free Design

The HOROW HR-ST076WD solves one of the most common toilet problems: leaky flappers. Traditional toilets use a rubber flapper that degrades over time, causing phantom flushes and water waste. This HOROW model uses a flapper-free design that eliminates that failure point entirely.

The MAP 800g flush rating means it handles solid waste effectively, though it is slightly lower than the 1000g models on this list. What impressed me is how quiet the siphon flush is. Multiple reviewers compared it favorably to premium brands that cost significantly more. The fully-glazed 2-inch trapway keeps things moving smoothly.

The compact dimensions of 28.75 inches deep by 14 inches wide make this a good fit for narrower bathroom layouts. The chair-height seating is comfortable for most adults, and the skirted design means the exterior cleans up with a single wipe. The two large side mounting holes help with installation.

The main weakness reported by reviewers is the toilet seat hinge. Over time, the hinge can become loose and eventually break. Replacement hinges are reportedly difficult to source directly from HOROW, so some owners have used aftermarket seats instead.

Who This Toilet Works Best For

This model is perfect for homeowners tired of replacing flappers and dealing with running toilets. The flapper-free design means fewer maintenance headaches over the life of the toilet. It is also a solid choice for small bathrooms thanks to the 14-inch width.

The cUPC certification and lifetime after-sales service add confidence. At its price point, the HR-ST076WD offers excellent value for a flapper-free, skirted one-piece toilet from a brand with a proven track record.

8. Los Flexi LFU6-WT-A – Best Rimless Swirl Flush

The Los Flexi LFU6-WT-A brings rimless flush technology to the one-piece toilet category. Traditional toilets have a rim around the top of the bowl where water flows through small holes. That rim area can harbor bacteria and be difficult to clean. The rimless design eliminates that problem entirely, using a dual-nozzle swirl system to rinse the bowl.

The dual-flush system uses just 1.0 GPF for liquids and 1.28 GPF for solids, making this one of the most water-efficient models in the roundup. The ADA-compliant 17-inch chair height is comfortable for most adults, and the elongated bowl provides good seating surface area.

Reviewers consistently praise the modern aesthetic and glossy white finish. The skirted one-piece design has no external crevices, so the entire exterior can be wiped down quickly. The soft-close quick-release seat is included and operates quietly.

On the downside, some users reported that the flush is not as powerful as expected, requiring occasional unclogging. Installation follows the familiar pattern of skirted one-piece toilets: small mounting holes can be difficult to reach, and the unit weighs 102 pounds, so two people are needed for positioning.

Who This Toilet Works Best For

If hygiene is your primary concern, the rimless design is a major advantage. Without a rim, there is no hidden area where bacteria and mineral deposits can accumulate. This makes the Los Flexi an excellent choice for households with health-conscious members or anyone who wants to minimize cleaning time.

The 4.7-star rating from early reviewers suggests strong satisfaction with both performance and aesthetics. Los Flexi offers 48-hour customer service response times, which is reassuring for a newer brand.

9. SOTOMO K-0351DF – Best Power Flush Compact Toilet

The SOTOMO K-0351DF packs a MAP 1000g flush rating into a compact 14.38-inch-wide footprint. That maximum power rating means it can clear 1000 grams of solid waste in a single flush, matching the performance of the WOODBRIDGE at the top of this list. The 3-layer fully glazed ceramic is fired at 2246 degrees Fahrenheit, creating a stain-resistant surface.

The dual-flush system offers 1.1 GPF for liquids and 1.6 GPF for solids. The ADA-compliant 17.2-inch chair height is comfortable for seniors and anyone with mobility concerns. The quick-release soft-close seat is included and can be removed for deep cleaning without tools.

Installation comes with a few quirks worth noting. The unit ships with a preinstalled adapter for the incoming water supply that may need removal for standard US plumbing. The mounting bolt positions and water line placement can be awkward in tight spaces. The included installation instructions could be more detailed, so having some plumbing experience helps.

Despite the installation challenges, reviewers are highly satisfied with the flush performance and modern appearance. The skirted one-piece design wipes clean easily, and the compact dimensions work well in smaller bathrooms.

Who This Toilet Works Best For

Buyers who want maximum flushing power in a compact form factor should consider the SOTOMO. The MAP 1000g rating puts it in the top tier for waste clearance, and the 14.38-inch width fits tight spaces. The lifetime customer support and 1-year warranty provide reasonable coverage.

This is also a good option if you want a skirted toilet with a proven glazing process. The 3-layer ceramic fired at 2246 degrees Fahrenheit creates a harder, more stain-resistant surface than standard glazing.

10. Lordear MLT004 – Best Value with Long Warranty

The Lordear MLT004 stands out for offering the longest warranty in this roundup at 3 years. The high-strength ceramic is fired at 2336 degrees Fahrenheit and can support up to 880 pounds, which is exceptional for a toilet at this price point. The siphonic vortex flush technology creates a powerful rinsing action.

The dual-flush system uses 1.24 GPF for liquids and 1.43 GPF for solids, which is slightly higher than the most efficient models but still well within WaterSense territory. The ADA-compliant 17-inch comfort height is suitable for most adults, and the elongated bowl provides comfortable seating.

The self-cleaning glaze and skirted trapway work together to prevent dirt buildup and reduce cleaning frequency. The soft-close quick-release seat is included and operates quietly. Lordear packages a complete accessories kit with the wax ring and mounting hardware.

Note that the closet flange and water supply line must be purchased separately, which is an additional cost to factor in. With only 12 reviews so far, this is a newer entry with less long-term reliability data. However, all 12 reviews are 5 stars, which is a strong early signal.

Who This Toilet Works Best For

Buyers who value warranty coverage above all else should look here. The 3-year warranty is the longest in this roundup, and the 24/7 customer support adds confidence. The 880-pound weight capacity is also notable for larger users or households concerned about durability.

This model works well in modern bathrooms where a sleek, minimalist one-piece design is desired. The compact 26.19-inch height and 15.94-inch width fit most standard bathroom layouts without dominating the space.

Buying Guide: How to Choose the Best One Piece Toilet

Choosing the right one-piece toilet comes down to understanding a few key specifications and how they affect your daily experience. Here is what matters most when comparing models.

One-Piece vs Two-Piece Toilets

One-piece toilets combine the tank and bowl into a single ceramic unit. This design eliminates the gap between tank and bowl where bacteria, mold, and dust accumulate. The result is a toilet that is easier to clean and has fewer potential leak points. Two-piece toilets are typically cheaper and easier to ship, but the exposed trapway and tank-bowl seam require more maintenance over time.

The trade-off with one-piece designs is weight. Because the entire unit is a single piece of ceramic, it weighs between 99 and 115 pounds. You will almost certainly need two people to lift and position it during installation. Once installed, though, a one-piece toilet is more stable and less prone to wobbling.

Flush Technology and Water Efficiency

Modern one-piece toilets use three main flush types: gravity-fed siphon flush, pressure-assisted flush, and dual-flush systems. Siphon flushes are the most common and operate quietly. Pressure-assisted flushes are louder but more powerful. Dual-flush systems give you two options: a lower-volume flush for liquids and a full-volume flush for solids.

Water efficiency is measured in gallons per flush (GPF). The federal maximum is 1.6 GPF, but WaterSense-certified models use 1.28 GPF or less. The dual-flush models in this roundup offer partial flushes as low as 1.0 GPF. Over a year, switching from an older 3.5 GPF toilet to a 1.28 GPF model can save up to 16,500 gallons of water.

Bowl Shape: Elongated vs Round

Elongated bowls extend about 2 inches further from the wall than round bowls. They provide more seating surface area, which most adults find more comfortable. Round bowls save space, making them better for very tight bathrooms. Every toilet in this roundup uses an elongated bowl, but several are compact elongated designs that shorten the depth while maintaining the oval shape.

If your bathroom is truly tiny, look at the HOROW T0338W or the Casta Diva CD-T006. Both manage to fit an elongated bowl into a compact footprint under 26 inches deep. You get comfort without sacrificing too much floor space.

Seat Height: Comfort vs Standard

Standard toilet seats sit about 15 to 16.5 inches high. Comfort height, also called chair height or ADA-compliant height, sits between 17 and 19 inches. The extra 2 to 3 inches makes a significant difference for taller adults, seniors, and anyone with mobility issues. Sitting down and standing up requires less effort from a higher seat.

Most models in this roundup offer ADA-compliant heights. The DeerValley DV-1F026 is the notable exception with a standard 16.875-inch height. If ADA compliance matters for your situation, double-check the seat height specification before ordering.

Rough-In Measurement Guide

The rough-in is the distance from the wall behind the toilet to the center of the floor drain (closet flange). The standard rough-in measurement is 12 inches, but older homes may have 10-inch or 14-inch rough-ins. Measuring correctly before ordering is essential because a toilet with the wrong rough-in will not fit.

To measure, find the closet bolts at the base of your current toilet. Measure from the wall (not the baseboard) to the center of the bolts. That number is your rough-in. All 10 toilets in this roundup are designed for 12-inch rough-ins, and several offer 10-inch and 14-inch variants.

Skirted vs Exposed Trapway

A skirted trapway hides the S-shaped pipe on the side of the toilet behind a smooth ceramic panel. This creates a clean, modern look and eliminates the ridges and curves where dust and grime collect. The downside is that skirted designs make installation harder because the mounting bolts are hidden behind the skirt.

Every toilet in this roundup features a skirted design. If you are doing a DIY installation, look for models with larger side access holes like the DeerValley DV-1F026 or HOROW T0338W. These make it significantly easier to reach and tighten the mounting bolts.

Conclusion: Which One Piece Toilet Should You Buy?

After reviewing 10 models across every price tier, our top recommendation for the best one piece toilet remains the WOODBRIDGE B0940. It combines a 1000g MaP flush score, ADA chair height, dual-flush efficiency, and a skirted design at a reasonable mid-range price. For small bathrooms, the HOROW T0338W is the compact champion. And for budget-conscious buyers, the DeerValley DV-1F026 delivers skirted design and dual-flush performance at the lowest price in this roundup.

If you want the absolute best flushing power and longest warranty, the American Standard Champion 4 is worth the premium. Its 4-inch flush valve and 10-year warranty make it a long-term investment that outlasts cheaper models. Whatever you choose, make sure to measure your rough-in carefully, plan for a two-person installation, and enjoy the cleaner, sleeker look that only a one-piece toilet can deliver in 2026.