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7 Best One Piece Toilets of 2021 — Reviews & Top Picks

WOODBRIDGEThe average person will spend 92 days, or about three months, of their life on the toilet. Choosing the right model is therefore quite an important decision.

One-piece toilets are sleeker and harbor fewer bacteria, and most major manufacturers have their own line. But different models have different seat heights, can be made from plastic or a combination of ceramic and porcelain, and have varying water usage rates. There are elongated or round finishes and single- and double-flushes. You also need a model that matches the rough-in distance from the wall to the flange center.

Fortunately, we’ve done all the research for you, checking dozens of one-piece toilets and creating a list of in-depth reviews. We’ve narrowed down the selection and have included in-depth reviews of eight of the best models on the market today.


A Quick Comparison of Our Favorites

Rating Image Product Details
Best Overall
Winner
WOODBRIDGE T-0019 WOODBRIDGE T-0019
  • 28-gallon siphon flush
  • Elongated design for comfort
  • Slow closing lid
  • Premium Choice
    Second place
    Toto UltraMax II Toto UltraMax II
  • Beautiful porcelain material
  • Ultra-smooth ceramic glaze
  • Tornado flushing system
  • Third place
    Swiss Madison St. Tropez Swiss Madison St. Tropez
  • Tiny 0.8-gallon partial flush
  • Low seat ideal for kids
  • American Standard Champion American Standard Champion
  • EverClean glaze prevents staining
  • Fast flush
  • 5-inch toilet seat height
  • TOTO-Eco-Ultramax TOTO-Eco-Ultramax
  • Space-saving round bowl
  • Fast flush system
  • EPA
  • CEC
  • and CALGreen compliant

  • The 7 Best One-Piece Toilets — Reviews 2021

    1. WOODBRIDGE T-0019 Elongated One Piece Toilet — Best Overall

    WOODBRIDGE T-0019 Elongated One Piece Toilet

    The Woodbridge T-0019 elongated toilet has a sleek design, quiet operation, and combines a 1.28-gallon tank with a dual-flush unit for water efficiency. The flush size means that the design is smaller than most other units and is perfect for use even in confined spaces, but the flush is still effective, thanks to its siphon design. The water-efficient flush is quiet too, so it won’t disturb the rest of the house even in the middle of the night. The Woodbridge has an elongated seat design that offers comfort even for those who like to linger and relax.

    The T-0019 comes with all the parts and components required for fitting, including a preinstalled slow-closing lid.

    Reviews of this toilet are extremely positive, but there have been a few complaints that the unit is heavy at 118 pounds, making installation a two-person job, and that there can be a gap at the front of the base when installed on a flat floor.

    Pros
    • 28-gallon siphon flush
    • Elongated design for comfort
    • Slow closing lid
    Cons
    • Heavy at 118 pounds
    • Slight gap at the base

    2. Toto MS604114CEFG#01 UltraMax II One-Piece Toilet — Premium Choice

    Toto MS604114CEFG#01 UltraMax II One-Piece Toilet

    The Toto UltraMax II is an excellent toilet with high-quality features. It is made from high-grade porcelain and boasts an ultra-smooth ceramic glaze designed to prevent waste clinging to the surface, making it easier to clean. It also has a tornado flushing system, which ensures that every splash and droplet is properly cleaned from the inside of the bowl.

    However, it is at the top end when it comes to price, and despite these high-end features, there have been reports that the toilet is easily clogged, and its design means that it is difficult to unclog even with a plunger. There have also been complaints that there isn’t much clearance between the toilet seat and the water.

    Pros
    • Beautiful porcelain material
    • Ultra-smooth ceramic glaze
    • Tornado flushing system
    Cons
    • Very expensive
    • Easy to clog and difficult to unclog
    • Not much clearance between seat and water

    3. Swiss Madison SM-1T254 One Piece Toilet

    Swiss Madison SM-1T254 One Piece Toilet

    The Swiss Madison one-piece toilet has a low seat, which is great if you have kids who don’t want to have to use a toilet step, but it isn’t ADA compliant, so it isn’t suitable for users with mobility issues. The elongated seat makes it more comfortable to sit on, even for prolonged use, and this model has a dual flush that uses a minuscule 0.8 gallons of water for a partial flush and 1.28 gallons for a full flush. This gives you the option to minimize your water usage while still giving you a more powerful flush when required.

    Unfortunately, there have been reports that the short flush can cause a small upward spray of water to leak from the bowl, and some have complained that despite the elongated design, it isn’t comfortable to sit on.

    Pros
    • Tiny 0.8-gallon partial flush
    • Low seat ideal for kids
    Cons
    • Short flush causes upward spray
    • Some complaints of uncomfortable seating

    4. American Standard Champion Elongated One-Piece Toilet

    American Standard Champion Elongated One-Piece Toilet

    The American Standard Champion Elongated toilet has a more traditional design compared to other one-piece models. It has a 16.5” seat height, so it is both ADA compliant and will benefit family members with shorter legs. There is a slow-close seat included when you buy the American Standard, and the bowl has an EverClean glaze that prevents mildew, stops bacteria from forming, and makes the toilet easier to clean.

    It does use 1.6 gallons per flush, which is higher than most other models in the list, so it isn’t as water efficient, but it does flush in under a second, and the manufacturers claim that it will get rid of a mass 70% bigger than other toilets! However, there have been complaints about the quality of the seat.

    Pros
    • EverClean glaze prevents staining
    • Fast flush
    • 5-inch toilet seat height
    Cons
    • Flimsy toilet seat included
    • Flush uses a great deal of water

    5. TOTO MS853113E#11 Eco Ultramax One Piece Toilet

    TOTO MS853113E#11 Eco Ultramax One Piece Toilet

    The Toto Eco Ultramax one-piece toilet is suitable for the smallest of spaces. It includes a soft-close lid, so no more trapped fingers or late-night crashes. It has a 1.28-gallon per flush, and the 3-inch flush valve and fully glazed 2 1/8” trapway ensure a fast and reliable flushing system. The seat height is suitable for shorter users, and it meets EPA, CEC, and CALGreen water conservation requirements. The Toto enjoys mostly positive reviews, especially for its shorter height and quieter flush, but there have been negative reports regarding the toilet seat not quite sitting flush to the toilet and wobbling while in use.

    Pros
    • Space-saving round bowl
    • Fast flush system
    • EPA, CEC, and CALGreen compliant
    Cons
    • Might be too short for some
    • Not everybody likes round toilets

    6. WOODBRIDGE T-0020 Elongated One Piece Toilet

    WOODBRIDGE T-0020 Elongated One Piece Toilet

    The Woodbridge T-0020 elongated toilet has a square design, giving it a unique aesthetic appeal. It has a dual-flush system with a 1-gallon partial flush and a more powerful 1.6-gallon full flush. This toilet is at the higher end of the price range for one-piece toilets, presumably due to its design, but it does include a premium soft-close toilet seat, as well as a wrench that should make installation easier. One-piece toilets do offer many benefits, but they can prove tricky to install without the right tools.

    The T-0020 gets positive reviews, although some don’t appreciate its weaker flush, and you’re unlikely to buy one unless you’re specifically looking for a rectangular design for your bathroom.

    Pros
    • Square design
    • Soft-close lid
    • Water-saving dual-flush system
    Cons
    • Expensive
    • Square design not to everybody’s taste

    7. Ariel Bath TB309-1M Elongated One Piece Toilet

    Ariel Bath TB309-1M Elongated One Piece Toilet

    The Ariel Bath TB309-1m is an elongated one-piece toilet, extending an extra inch at the front of the toilet compared to a round bowl. It is cheaper than many of the toilets on this list and has a unique design. The dual-flush system offers a 0.8-gallon and a 1.6-gallon flush.

    It includes a soft-close lid and has received positive reviews for being easy to install. As is common with cheaper toilets, there have been complaints about the quality of the plastic seat, and because the seat isn’t a standard fitting, it will cost quite a bit to replace.

    Pros
    • Elongated seat design
    • 8-gallon partial flush
    Cons
    • Seat plastic is low quality

    Buyer’s Guide

    There are hundreds of toilets on the market, and considering how much time a typical family spends on the porcelain throne, you should ensure that you buy one that is suitable for all family members. Because the toilet will be such an integral feature of the bathroom, it also needs to look good and complement the aesthetic design of your room. Below are important features when comparing one-piece toilets.

    Size and Dimensions

    One of the great benefits of one-piece toilets is that they tend to be smaller than their traditional two-piece counterparts. This is not only ideal in smaller bathrooms, but it also leaves you with more floor and wall space in a standard bathroom. As such, check the dimensions of any model you’re considering, paying attention to how far it protrudes from the wall.

    Flush Systems

    One-piece toilets can include standard or dual flushes. A standard flush uses the same amount of water every time you pull the lever or push the button. A dual-flush system has a standard flush and a partial flush. The partial flush is suitable to get rid of liquids, typically uses much less water than a full flush, and it is also quieter than the full flush. Flush power is measured in gallons per flush, and a full flush usually uses around 1.5 gallons of water. A partial flush can use anywhere from 0.8 gallons to 1.2 gallons.

    Toilet Shape

    The shape of the toilet is also important. Traditional toilet designs are round, but many modern manufacturers offer elongated bowls. These extend further forward than a round seat and tend to offer greater comfort. Whether you prefer to dash in and out or are known for spending a long time on the toilet, comfort is important. There are also a small number of rectangular and square designs, although these are typically only bought for their aesthetic appeal.

    Swiss Madison Well Made Forever

    Seat Height

    Where available, look at the toilet seat height. Approximately 16.5 inches is considered a standard height. If you have smaller people in the house, you can buy a toilet with a 16-inch toilet seat height, but be aware that these are not suitable for those with mobility issues. The seat must be at least 16.5 inches from the ground to be considered ADA compliant.

    Seat Inclusion

    When it comes to the toilet seat, check whether your new toilet comes with an included seat. Some of these one-piece models feature unusual seat dimensions, and buying a replacement or new seat can cost more because of this. One of the areas where otherwise good-quality toilets lost out in reviews was in the quality of the seat. Soft-close lids are ideal if you want to avoid the harsh clattering noise of a dropped lid, and this is especially thoughtful if you have kids and don’t want to wake them in the middle of the night.


    Conclusion

    Overall, the Woodbridge T-0019 is the best one-piece toilet in this list. Other than a few complaints about the weight of the toilet making it tricky to install, it has received positive reviews from buyers. It has a water-efficient flush and a slow-closing lid.

    One-piece toilets are space saving and easy to clean, and we hope our list of toilet reviews has helped you find the best model, whether you’re renovating an existing bathroom, installing a new one, or simply replacing a tired old toilet.

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