Finding The Best One-Piece Toilet – Reviews 2020

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

one-piece toilets

There is a huge variety of one-piece designed toilets in the market with a range of styles, shapes, and features, but only some standout. 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 of those things you should invest greatly in. Buying a durable toilet with superior features is much more profitable 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 a detailed one piece toilet reviews this year.

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 the waste contents in the toilet bowl with one powerful flush while using only 1.28 gallons per flush exceeding the industry standards. It also offers an excellent EverClean surface finish, which prevents bacteria and microbes growth on the surface. 

Being one of the best one-piece toilets, it also provides 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 Standards lifetime warranty over the vitreous-made chinaware, 10-year warranty on all mechanical parts, and a 1-year warranty on the seat. It comes in two colors, which include 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 and 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 16 ½ inch-rim toilet also features right-height compatibility, which increases ease of use and 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 compliment your bathroom. It has a skirted trapway, which adds to its ergonomic design, and as it has no grooves and corners, it makes the toilet 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 16500 gallons of water savings every year compared to a 3.5 gpf toilet.

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

It also offers a chair-height seating and elongated bowl design, which makes sitting down easier for people of all ages. 

The product package includes the toilet, pre-installed soft-close seat, which prevents slamming of the toilet seat when pushed down, rectangular dual-flush button, floor bolts, wax ring, and the installation manual. 

4. KOHLER K-4007-96 Round-Front 1-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 applications. 

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

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

The product package includes the toilet, left-hand trip lever, and Kohler’s QuietClose finish, which prevents slamming with a gentle close and a Grip-Tight seat, which holds the seat firmly. 

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 have to 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. Being a one-piece toilet, it is easier to clean than a two-piece toilet as there are no nooks and crannies where dirt can settle in.

This universal height toilet has an advanced Tornado-flush system where the water fills up the toilet bowl in a 360-degree circular motion, which enables a powerful flush every time. It also features a 1.28 gpf single-flush which makes 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 toilet seat) which enables more convenience and comfort.

The Toto Promenade II product package includes the toilet, left-hand chrome trip lever, one-year limited warranty, and soft-close 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 its level best. It has a 1.6 gpf Power Gravity Flushing system with a G-Max siphon jet where the flapper opens up and allows the water to run down the toilet bowl to clear the contents with one powerful and quiet flush. It is a low-profile toilet so it fits even 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 fully glazed trapway which enables 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 assembly come pre-assembled. It comes with a chrome trip lever and soft-close seat but the wax ring and toilet supply lines need to be bought separately. The color range includes Cotton, Sedona Beige, Colonial wight, and Bone.

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

This compact one-piece model by Kohler comes with a comfort-height and elongated bowl design. It features the advanced AquaPiston technology where the water fills the toilet from all the sides which ensures 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 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-seat finish which makes sure that the toilet seat is fixed firmly and doesn’t make the sound when pulled down. The standard left-hand trip lever comes included with the product package. However, some users feel a little discomfort when handling the flush trip-lever and some complaints about leaks and backups have been noticed.

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, Santa Rose provides an 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 helps this toilet be superior to standard toilets due to its powerful and quick flush. The toilet’s elongated-bowl design and comfort height feature help sitting down and getting up easier for people.

This sleek and contemporary designed toilet will complement your bathroom in both commercial and residential applications. It has a 1.28 gpf single-flush system that uses the force of gravity and a large trapway that makes it WaterSense certified and water saving of up to 16,500 gallons per year.  

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

There are various color selections for the users, 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 inch 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 makes no room for leaks, clogs, or backups. It weighs 99 pounds and 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 SoftClose seat which enables gentle close of the toilet seat and lid.

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 where the liquid waste flush takes up 0.8 gpf and the solid waste flush takes 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 to the glazed trapway. It has a large surface area, which prevents foul odor and easier cleaning. The Uniform Plumbing Code and WaterSense certify it. 

This toilet is made of ceramic and comes in white color. The product package will include the toilet, soft closing seat, and lid to prevent abrupt slamming of the toilet seat and a 5-year warranty on all porcelain parts and 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 which ensures that there is increased flow and quick drawing of water with the end process of 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 finish by TOTO which allows the toilet seat to close instead of slamming abruptly gently. 

It also offers the SanaGloss finish that is 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 in choosing the best one-piece toilet that works best for you.

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