Best One-Piece Toilet – An Affordable Luxury for Your Bathroom

Last updatedLast updated: August 18, 2021
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In the modern variety of products, it is truly hard to decide what accessories would fit your home. For one of the most visited rooms in your household – the bathroom, you would definitely want to use the best and most comfortable options. The object of our review is not the one you would brag about to your friends, but it is important. So let us help you with choosing the one-piece toilet.

Mainly there are two types: the one-piece and the two-piece toilets. Even though the one-piece toilets are slightly expensive, many prefer them because they are easier to clean, are highly durable, and have a sleek design. Also, you won’t have to worry about such toilet leaking since it’s made of a single mold, and there aren’t any cracks or ridges for water to come out. People often find it more compact and comfortable, and as it goes – the design fits well for any bathroom decor. Additionally, with the best one-piece toilet, you don’t have to worry about the installation. You can install them in your RV, making it the perfect choice for your traveling needs. We have taken note of everything that you need to know about the best toilets. For instance, we checked how much water consumption you should be looking for, the flush type that you may prefer, and even the material, warranty period, and size. Selecting the right material is essential since it can make or break the look of your bathroom. It should be easy to clean, especially if you are potty training kids. Remember, the lower the water consumption, the more water you save.

Our review includes not only our opinions about the products but also advice from experts and customer reviews. This article starts with a table containing a rundown of the one-piece toilets that we liked the most, followed by an in-detail review of each of them and a buying guide to help you make the right purchase.

 Top 5 One-Piece Toilets Review 2021


WoodBridge T-0001Editor’s Choice

  • Size: 28.5 x 14.5 x 27.5 inches
  • Material: ceramic
  • Water consumption: 1.28 GPF
  • Flush type: dual flush
  • Warranty: 5-year limited warranty on porcelain parts; 1 year on flushing mechanism and soft closing toilet seat

More features: elongated bowl, fully glazed flush

A contemporary one-piece toilet constructed using ceramic – WoodBridge T-0001 has a dual flush mechanism along with a siphon jet. This means you can choose between light and heavy flushes according to your needs. Additionally, it saves a lot of water, thereby bringing down your water bill. The toilet uses a minimum of 1.28 gallons per flush, which makes it one of the most efficient products on our list.

Other than that, WoodBridge T-0001 is easy to install. You can do it on your own without any professional help. All you need is an installation manual and a hand wrench. On purchasing the toilet, you receive a wax ring, soft closing seat, and T-bolts that will help you with the installation. Yet, some users found it a bit difficult to attach the waterline.

Performance wise, the toilet is quiet and you would love the sleek design that makes it easy to clean – there are no hard to reach and hidden grooves here. With the toilet seat attached using a stainless steel hinge, you will have a high-end appeal.

You’re all good on the guarantee too. Porcelain parts of the toilet come with five years of limited warranty, while the soft closing toilet seat and flushing mechanism have one year of limited warranty.

Why are we impressed?

  • Dual flush mechanism to save water
  • Easy to install
  • Sleek look with a high-end appeal
  • Easy to clean
RELATED: 12 Best Toilets For Every Bathroom – Choose The Throne That Fits You


American Standard Champion-4Best Warranty

  • Size: 29.8 x 17.8 x 29.5 inches
  • Material: vitreous china
  • Water consumption: 1.6 GPF
  • Flush type: dual flush
  • Warranty: 10-year limited warranty

More features:  elongated bowl, 4-inch accelerator flush valve

A stylish yet straightforward product, American Standard Champion-4 is made of vitreous china that offers it durability and sleek, expensive look. The Champion 4 Flushing System is designed to flush out heavier waste than any other one-piece toilets on our list. The toilet comes with a dual flush mechanism and a siphon jet. It consumes 1.6 gallons of water per flush and is ADA compliant.

Water is released three times faster than in an average one-piece toilet so that the heavy waste is washed down easily. EverClean surface ensures that no germs, mold, or odor-causing bacteria grow on it, which is a considerable advantage with kids around in the house who need to use the toilet more frequently.

Like many other products on our list, American Standard Champion-4 can be installed on your own using the instruction manual and some plumber tools.

The main advantage of this toilet is the warranty. American Standard ensures you that flushing mechanism is 100% tested and gives ten years limited warranty on all the parts of the product.

Thought our reviewers were mostly pleased with the toilet, some of them have had trouble with closing the tank lid and needed it adjusted. Others have noticed that the seat is narrow and may get uncomfortable.

What are our favorite features?

  • 10 years of limited warranty
  • Powerful flushing system
  • Easy to clean

What could be better?

  • Tank lid doesn’t close fully
  • Narrow seat
RELATED: 12 Best Toilets For Every Bathroom – Choose The Throne That Fits You


TOTO CT418F AquiaBudget Pick

  • Size: 21 x 14.2 x 15 inches
  • Material: vitreous china, ceramic glaze
  • Water consumption: 1.6 GPF
  • Flush type: dual flush
  • Warranty: 1-year limited warranty

More features: 66.5 pounds wall toilet, elongated bowl

One of the most modern innovations in the world of toilets, the TOTO CT418F Aquia is a tankless toilet. It is directly connected to the in-wall tank system. The toilet is made of vitreous china, which has a SanaGloss ceramic glaze that protects it from mold development and also requires less water for cleaning.

Since the installation is a little different, you can only set it when you are still building the house or making renovations. And definitely, you will require professional help for it. This one-piece toilet has a water consumption of 1.6 gallons per wash.

Since it is sold without a seat, you will have to buy it separately. The manufacturer recommends  Toto SS114 01 SoftClose Elongated Toilet Seat Cover. You can attach a hand flush to it, which is also an extra purchase.

This TOTO toilet is a huge space saver, especially if you are living in an urban area, where you have limited bathroom space. The cleaning process is very simple since it isn’t attached to the floor, so there are no difficult spots and creases to reach out to.

It has an elongated bowl for maximum comfort and has a dual flush system helping you alternate between light and heavy flushes. It is a sturdy product which can sustain person’s weight up to 700 lbs, so there’s no worry about it breaking apart under anyone.

What makes it stand out?

  • Compact
  • SanaGloss ceramic glaze
  • Easy to clean
  • Powerful flushing system

Which disadvantages must you keep in mind?

  • Seat needs to be bought separately
  • Installation requires professional help
  • Expensive
RELATED: 7 Best Toto Toilets You Can Get in 2021 – Reviews and Buying Guide


TOTO UltraMax IIMost Elegant

  • Size: 28 x 16 x 28 inches
  • Material: vitreous china
  • Water consumption: 1.28 GPF
  • Flush type: tornado flush, single
  • Warranty:1-year limited warranty

More features:  CALGreen compliant, elongated bowl

Another elegant product by TOTO, the UltraMax II is fitted with a Tornado Flushing system that offers 360 degrees cleaning while using less water. It has a nozzle bowl cleansing mechanism, which develops a centrifugal rinsing action. The one-piece toilet only has one flush, but since the water consumption is only 1.6 gallons per flush, you aren’t wasting much water.

It is constructed using vitreous china but has a Cefiontect glaze, which gives it a high-end look. The universal height of the toilet ensures that you are comfortable while using it. The soft toilet seat is included in the price of the product. It is CALGreen compliant, which means it is not only energy efficient but also supports green energy and fulfills qualifications required to be certified as an environmental protection accessory.

TOTO UltraMax II is also ADA compliant and meets all standards set by EPA WaterSense. Other than that, it is easy to install for which you won’t require a professional. You can repair it on your own, so you save a lot there as well. The manufacturer offers one year of limited warranty on this product.

One of the main flaws of the mechanism – it is a bit loud, so better to use this toilet in bigger households. Reviewers mentioned that angle of the inside of the bowl is too steep and takes some getting used to.

What are our favorite features?

  • Water saving mechanism
  • Follows safety regulations set by CEC, CalGreen, ADA, and EPA WaterSense
  • Universal height

What could be better?

  • Angle of the insides is too steep
  • Loud
RELATED: 7 Best Toto Toilets You Can Get in 2021 – Reviews and Buying Guide


Thetford Aqua-Magic VBest for Travelling

  • Size: 15.8 x 18.2 x 19 inches
  • Material: plastic
  • Water consumption: unavailable
  • Flush type: hand flush
  • Warranty: 1-year limited warranty

More features: weighs 9.4 pounds

A classic choice for RV traveling, the Thetford Aqua-Magic V is compact and only weighs 9.4 lbs. It is made of plastic so that it can easily be transported from one location to another. It has a single flush mechanism, which is a hand flush. If you want to switch the hand flush to a pedal flush, you can ask the manufacturer to do that for you.

The toilet has a 100 percent bowl coverage flush. To use it, you have first to press it halfway so that the bowl is filled and then flush all the way to clean up. If you want to decrease water consumption, even more, you can fit it with a hand sprayer. The one-piece toilet comes with a textured lid that sheds water and resists scratches, offering a comfortable home-like experience.

It is taller than an average one-piece toilet, so that tall people don’t feel too crunched up while using it. You can either purchase it in bone color or white color, both of which are minimal and go with every decor style of RV. Thetford offers one year of limited warranty on this product.

It would take some time and plumbing knowledge to install the piece, so you’d probably need to get some help.

What are its best features?

  • Taller than usual RV toilets
  • Affordable
  • Portable
  • You have the choice of hand flush or foot flush

What could be improved?

  • Difficult to install
RELATED: 8 Most Reliable RV Toilets To Make Your Trip More Comfortable

Things to Consider

Now that you know the best one-piece toilets, you have to find the one that’s perfect for your house needs. One-piece toilets are sleek and complement today’s contemporary decor that most homeowners aim for. Still wondering what’s the right choice for you? Our buying guide will help you out!

Advantages and disadvantages of having a one-piece toilet


One-piece toilet

One-piece toilet gets 10 out of 10 when it comes to ease of cleaning. It has no crevices like a two-piece toilet, so you don’t have to worry about mold or odor-causing bacteria build-up. Also, there are fewer chances of breakage because it is entirely one piece except for the toilet seat and a few pipes. Since there are no creases and nooks, moisture can’t get inside, which maintains the integrity of the material used.

One-piece toilets are easy to install. All you need is the manufacturer’s installation guide and a few plumbing tools. Not only one-piece toilets are lower compared to two-piece toilets, but they are also more compact in size.

We recommend people living in urban areas to install a one-piece toilet because it gives you more space to move around. We also recommend it for those who have children in a potty training stage and old people as its height is comfortable.

All one-piece toilets are CEC and CalGreen compliant, so you are saving on your water bill.


One-piece toilets are quite expensive, you’d risk more with buying cheaper ones since they’d be made of less qualitative materials. Unfortunately, if the toilet bowl of a one-piece toilet breaks or starts leaking, you have no choice but to replace it entirely as everything is attached to each other.

If you are too tall, it will be difficult for you to use a one-piece toilet as most of them are very low to the ground. However, you can opt for the wall mount one-piece toilet, like TOTO CT418F Aquia, and place it two inches higher than the average height of a one-piece toilet.

The biggest disadvantage of a one-seat toilet is its weight, which is a huge problem during installation. If you have back or joint pain issues, we recommend you to not install it on your own. They can weigh anywhere between 70 lbs to 200 lbs, so make sure you take another person’s help while doing the lifting and installation.

Features to consider while choosing a one-piece toilet

Flush type benefits

You should prefer a dual flush mechanism while buying a one-piece toilet. You can alternate between light and heavy flushes depending on your use. As an example, WoodBridge T-0001 offers a powerful dual flush system and it saves a huge amount of water. The heavy flush uses up to 1.28 gallons of water per flush, one of the lowest on our list. Water consumption is lower during the light flush.

Efficient water consumption

Water consumption

Lower water consumption effectively brings down your water bill, and we all love to save some extras, don’t we? Gallons of water per flush is the amount of water poured out of the tank in a single flushing. The lowest gallons per flush number on our list is 1.28, so you would like to consider our top choices: WoodBridge T-0001 and TOTO UltraMax II. In the most states, you cannot purchase a toilet that consumes more than 1.6 gallons of water per flush.


Obviously, toilets that are made of porcelain and ceramic are more durable compared to vitreous china and plastic. They also have a better appearance and a high-end appeal. However, they are more expensive, so if you are falling short on the budget, you can settle for vitreous china, which is the second best. American Standard Champion-4 is a nice solid toilet made entirely out of vitreous china.

If you are looking for something lightweight for your RV, you can purchase the Thetford Aqua-Magic V, made out of plastic and weighs only 9.4 lbs.

Types of bowl

Even though a round bowl shape takes up less space, an elongated one is much more comfortable as it has a bigger seating area. Luckily, one-seat toilets are very compact so that the elongated bowl won’t take up much space. Most of the models mentioned in our review have an elongated bowl so you can pick any.


An average comfortable seating height is 14 to 15 inches above floor level.

Yet if you have young kids or elderly at home, you should get the TOTO CT418F Aquia because it is the smallest on our list and can be placed higher or lower on the wall depending on your preference.

If everyone at your home is tall, opt either for WoodBridge T-0001 or TOTO UltraMax II because they are two inches taller than an average one-seat toilet.


Weight shouldn’t really be a barrier to making the decision unless you want your toilet to be portable. We recommend you to purchase the Thetford Aqua-Magic V it is made of plastic so it weighs only 9.4 pounds. It is specifically made for recreational traveling purposes. You can also fit it in your children’s bathroom if you are potty training currently.

Mounting type

There are two types of mounting available – wall mount and floor mount. One-piece toilets that are floor mount type can be installed without any professional help. However, a wall mount requires maintenance service as its water tank is usually fitted within the wall behind it.

We suggest you go for the TOTO CT418F Aquia because of it a compact wall mount one-piece toilet and is very easy to maintain and highly durable. If you want to stick to a floor mount, WoodBridge T-0001 is the best one around.


One-piece toilet manufacturing companies usually offer one year of limited warranty. When you buy WoodBridge T-0001, you get five years of limited warranty on the porcelain parts of the toilet and one-year limited warranty on soft closing toilet seat and flushing mechanism. American Standard Champion-4 toilet’s warranty covers all the parts for 10 years.

Extra features

Having a teething toddler in the house means you want something that has a quiet functioning. WoodBridge T-0001 is the quietest one-piece toilet you’ll ever find. Touchless flushing technology is another feature you can opt for.

Additional luxury you can indulge in is a hand pump, which you will have to connect to the nearby wash basin.


Yes, it can and it is easy to do for the most toilets. The only thing you’d need to look up is the type of the fill valve of your toilet and follow the instructions given in every toilet manual. The types of fill valves are: plunger/piston-type fill valve, diaphragm-type fill valve, float-cup-type fill valve, floatless-type fill valve.

We recommend you not to use chlorine cleaners, as they are unsafe for you. Try using either non-chemical traditional methods like soda or vinegar recipes, or popular products such as Lysol Power & Fresh Toilet Bowl Cleaner.

You can do anything you want with the modern RVs since the constructions allow it. Some of the toilets are specially designed for recreational vehicles, try out Thetford Aqua-Magic V.

Our Verdict

WoodBridge T-0001 is absolutely the best and is among the better ones in the list. This toilet has a powerful dual flush mechanism and an elongated toilet bowl for added comfort. It is easy to install and comes with five years of limited warranty.

TOTO CT418F Aquia is our budget pick and the best space saving one-piece toilet. It is a wall mount toilet, which gives you the flexibility of deciding the height you want your toilet to be placed at. In addition, it completely omits out the toilet tank, which it is fitted inside the wall.

One of the best one-piece toilets is the American Standard Champion-4. It comes with ten years of limited warranty, which is the best you can find among all toilet brands. There are more benefits to buying it since it includes a much more powerful flushing system and is ADA compliant.

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