Finding the Best One-Piece Toilet – Reviews 2020

One-piece toilets are designed as a single unit in which the bowl and tank are connected. The main advantage of a one-piece toilet is that they are much easier to clean since there are no gaps between the bowl and tank, preventing dust from settling in the cracks.

one-piece toilets

There’s a huge variety of one-piece designed toilets on the market with a range of styles, shapes, and features, but only some stand out from the crowd. Listed below are some of the most popular one-piece toilets due to their advanced flushing technology, water efficiency, and durability.

A toilet is one feature of your home that should be invested in carefully. Buying a durable toilet with superior features is much more economical than buying one that will make you call the plumber twice a month.

Looking for a new one-piece toilet but can’t decide which one to buy? We’re here to provide you with detailed one-piece toilet reviews.

Here Are the 11 Best One-Piece Toilets

1. American Standard Town Square S Elongated One-Piece Toilet – Top Pick

American Standard is known for manufacturing highly efficient and durable one-piece toilets, and the 2851AA105.020 Town Square S is no exception.

With a design inspired by classic American architecture, this sleek single-construction model always delivers.

This WaterSense compatible toilet features a PowerWash rim that removes all of the waste contents in the toilet bowl with one powerful flush of only 1.28 GPF, exceeding the industry standards. It also offers an excellent EverClean surface finish, which prevents bacteria and microbes from growing on the surface. 

Being one of the best one-piece toilets, it also has an elongated bowl and American Standard’s Right Height feature, which makes it ADA compliant and suitable for people of all ages, including the elderly and physically challenged. It has a soft-close seat and a choice between a right/left chrome finish trip lever.

This one-piece skirted toilet is backed by American Standard’s lifetime warranty over vitreous-made chinaware, a 10-year warranty on all mechanical parts, and a 1-year warranty on the seat. It comes in two colors: white and linen.

2. American Standard H2Option One-Piece Toilet Dual Flush – Runner -Up

With its water-efficient gravity flush, the American Standard H2Option Dual Flush toilet provides water savings every year. This toilet also gives you a choice between a full or partial flush for solid and liquid waste. Its 0.92 GPF/ 1.28 GPF dual flush exceeds industry standards by being WaterSense certified and providing maximum water conservation. 

This toilet, with a 16 ½-inch rim, also features Right Height compatibility, which increases ease of use and provides unbeatable comfort compared to standard toilets.

The H2Option also offers the signature EverClean surface finish that prevents dirt from sticking to the surface with no added cost. It has a standard 12-inch rough-in and a fully glazed 2-inch trapway, which ensures that there are no clogs.

This one-piece toilet features advanced siphon jet technology with the PowerWash rim, which flushes all the contents in the bowl with one quick, clean and quiet flush.

It comes with an elongated bowl, a chrome-plated top mounted push button, and a sanitary bar, which prevents the water from collecting under the tank at the back of the bowl. The toilet seat has to be bought separately. It is made of vitreous china and comes in three colors: white, linen, and bone.

3. WOODBRIDGE T-0001 Modern One-Piece Toilet – Best Value for Money

Being one of the most successful brands in the toilet manufacturing industry, Woodbridge never disappoints. With its sleek and contemporary design, the Woodbridge T-0001 Dual Flush toilet will beautifully complement your bathroom. It has a skirted trapway, which adds to its ergonomic design, and as it has no grooves and corners, the toilet is much easier to clean.

This water-saving toilet has a 1.0/1.6 GPF dual flush with an average of 1.28 GPF. It meets EPA WaterSense guidelines and provides up to 16,500 gallons of water savings every year compared to a 3.5 GPF toilet.

The T-0001 Dual Flush one-piece toilet features a siphonic flush design, which includes a fully glazed flushing system with an extremely quiet and powerful flush, preventing clogs, backups, and leaks.

It also has Chair Height seating and an elongated bowl design, which makes sitting down easier for people of all ages. 

The product package includes the toilet, a rectangular dual flush button, floor bolts, a wax ring, the installation manual, and a pre-installed soft closing seat that doesn’t slam when pushed down. 

4. KOHLER K-4007-96 Round-Front One-Piece Toilet

Being one of the most efficient and popular toilet manufacturers, Kohler maintains its prestige with the San Souci one-piece toilet. With a sleek shape and easy-to-clean design, this one-piece toilet is extremely convenient and suitable for commercial and residential establishments. 

It has a round-front bowl design, making it ideal for small bathrooms, en-suites, and powder rooms. It features a 1.28 GPF single flush system and AquaPiston flushing technology that fills the toilet bowl with water from all sides in a 360-degree swirling motion, ensuring that what goes down, stays down.

It is WaterSense certified and exceeds industry standards by providing 16,500 gallons in water savings. The flush valve and trapway have a 3:2 ratio, and it uses gravity to flush down everything smoothly.

The product package includes the toilet, left-hand trip lever, and Kohler’s Quiet-Close seat, which prevents slamming with a gentle close, and Grip-Tight bumpers to hold the seat firmly in place. 

It has a 12-inch rough-in and a huge color selection, which includes almond, biscuit, black, cashmere, dune, ice gray, sandbar, thunder gray, and white. It also includes a 1-year limited warranty. The supply lines must be bought separately.

5. TOTO MS814224CEFG#01 Promenade II Elongated One-Piece Toilet –

With a classic and modern-age design, the TOTO Promenade II features an elongated bowl design and a Tornado flush system. It is easy to clean, as there are no nooks and crannies in which dirt can settle.

This Universal Height toilet has an advanced Tornado flush system that fills up the toilet bowl with water in a 360-degree circular motion, which causes a powerful flush every time. It also features a 1.28 GPF single flush, making it WaterSense certified.

The TOTO’s signature CEFIONTECT surface finish prevents any microbes or bacteria from growing on the toilet surface. It is ADA compliant due to its 16.25-inch height (excluding the toilet seat), which allows for more convenience and comfort.

The Toto Promenade II product package includes the toilet, left-hand chrome trip lever, a one-year limited warranty, and a SoftClose seat. It has a variety of color selections like cotton, bone, colonial white, and Sedona beige.

6. TOTO MS853113#01 Ultimate One-Piece Toilet with Quiet Flush

Another one of our favorites is the Toto Ultimate one-piece round-fronted toilet. With a sleek and ergonomic design, it performs to the best of its level. It has a 1.6 GPF Power Gravity flushing system with a G-Max siphon jet. This system causes the flapper to open up and allows the water to run down the toilet bowl, clearing the contents with one powerful and quiet flush. It is a low-profile toilet, so it even fits in bathrooms with limited space.

It has a round-fronted bowl and a standard 12-inch rough-in. It also has a wide 3-inch valve and a fully glazed trapway that allows for smooth and water-efficient flushes. However, some consumers have noticed some clogs and leaks after a few months of installation.

The installation method is very easy as the fill valve and the flapper come pre-assembled. It comes with a chrome trip lever and SoftClose seat, but the wax ring and toilet supply lines need to be bought separately. The color options include cotton, Sedona beige, colonial white, and bone.

7. KOHLER K-5172-0 Compact Elongated One-Piece Toilet

This compact one-piece model by Kohler is Comfort Height and comes with an elongated bowl design. It features the advanced AquaPiston technology that fills the toilet with water from all sides, ensuring that the bowl gets a clean and thorough rinse with every flush. Even though it is an elongated bowl model, it takes up a similar space as a round-fronted toilet due to its low profile.

The 1.28 GPF powerful flush ensures water efficiency by saving 16,500 gallons of water every year. The Comfort Height feature makes it comfortable for everyone in the house, and the concealed trapway and clean caps make cleaning much easier.

It comes equipped with a Quiet-Close and Grip-Tight seat finish, which makes sure that the toilet seat is fixed firmly and doesn’t make a sound when pulled down. The standard left-hand trip lever comes included with the product package. However, some users felt a little discomfort when handling the flush trip lever, and we also noticed some complaints about leaks and backups.

The San Souci is made of vitreous china, weighs 94 pounds, and has a Comfort Height of 16.38 inches for more ease and comfort. There is a 1-year limited warranty with every purchase and a variety of color selections.

8. Kohler 3810-0 Santa Rosa Comfort Height One-Piece Toilet

Being one of the most popular Comfort Height one-piece toilets, the Santa Rose is the ideal solution for places with limited space due to its compact elongated bowl design. It seems to be very easy to clean due to the lack of corners and grooves in the toilet design.

The AquaPiston flushing technology makes this toilet superior to standard toilets due to its powerful and quick flush. The toilet’s elongated bowl design and Comfort Height feature make sitting down and getting up easier for people.

This toilet, with its sleek and contemporary design, will look great in bathrooms of both commercial and residential establishments. It has a 1.28 GPF single flush system that uses the force of gravity and a large trapway, making it WaterSense certified and saving up to 16,500 gallons of water per year.  

It is made of china and comes equipped with a Brevia Quiet-Close seat, a one-year limited warranty, and a left-hand trip lever with every purchase.

There is a variety of colors to choose from, including almond, biscuit, black, dune, ice gray, sandbar, and white.

9. Toto MS854114ELR#01 Eco UltraMax Quiet ADA-Compliant One-Piece Toilet

Being one of the most environment-friendly toilets, The TOTO Eco UltraMax is known for its water-efficient, E-Max flushing technology. This high-profile one-piece toilet is 16 ½ inches high (excluding the toilet seat). It includes an elongated bowl design, which makes it ADA compliant and accessible for people of all ages, including the elderly and the differently-abled.

The E-max flushing system by TOTO provides a powerful flush with a 3-inch wide flush valve and a bigger siphon jet while using only 1.28 gallons of water per flush. The huge trapway and computer-engineered ergonomic design leave no room for leaks, clogs, or backups. It weighs 99 pounds and is maybe a little difficult to commute.

The Eco UltraMax has a standard 12-inch rough-in and is made of ceramic. It comes with a tank cover, right chrome-plated trip-lever, fittings, and a SoftClose seat, which enables the toilet seat and lid to gently close.

10. EAGO TB351 Ceramic Dual Flush One-Piece Toilet

Over the years, EAGO has become one of the leading manufacturers in the toilet industry due to their dual flush systems, and the EAGO TB351 doesn’t disappoint. It has a dual flush system with the liquid waste flush taking up 0.8 GPF and the solid waste flush taking up 1.6 GPF per flush. 

This highly efficient one-piece has a siphonic flushing system that uses the force of a vacuum to clear the contents from the toilet bowl into the glazed trapway. It has a large surface area, which prevents foul odors from lingering and allows for easier cleaning. It has Uniform Plumbing Code and WaterSense certifications. 

This toilet is made of ceramic and comes in white. The product package includes the toilet and a soft closing seat and lid to prevent abrupt slamming of the toilet seat. It also comes with a 5-year warranty on all porcelain parts and a 1-year warranty on the toilet seat and the flush system. 

11. TOTO MS854114S#12 UltraMax One-Piece Elongated Toilet

Being the largest toilet manufacturer in the world, TOTO has a lot of variety when it comes to one-piece toilets. This high-profile one-piece toilet with a sleek and state-of-the-art design has a 1.6 GPF G-Max flushing system that caters to your need for quiet, quick, and powerful flushing performance.

This excellent flushing system features a wide 3-inch flush valve and a 2 1/8-inch glazed trapway, ensuring that there is increased flow and quick drawing of water with the end process pushing the water more forcefully. The only drawbacks with this toilet are that the screws are a little hard to reach and the flush is a little hard to operate.

The Ultramax weighs about 93 pounds and has a standard 12-inch rough-in with an elongated bowl design. This version model of the UltraMax series also features the signature SoftClose seat by TOTO, which allows the toilet seat to close instead of slamming abruptly gently. 

It also offers the SanaGloss finish, an advanced layer of glaze that prevents dirt particles from sticking to the toilet bowl and tank. This one-piece toilet includes a tank cover, 1-year limited warranty, fittings, SoftClose seat, and chrome-plated trip lever with every purchase. The wax seal and water supply lines need to be bought separately.


So, there you go. We hope this detailed review has helped you choose the best one-piece toilet that works for you.

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