10 Best One Piece Toilets 2026 in the United States

The KOHLER K-5172-0 San Souci is a one-piece toilet designed for comfort and efficient performance. It features a compact elongated bowl that offers more seating comfort than a round bowl while occupying similar space, making it a smart choice for bathrooms where space is limited but comfort matters. This model has a Comfort Height of about 28 inches, which is slightly taller than standard toilets, facilitating easier sitting and standing for most adults.

It utilizes KOHLER's Aqua Piston flushing system, a strong gravity-powered flush that cleans the bowl thoroughly with just 1.28 gallons of water per flush. This low water usage contributes to water bill savings and environmental friendliness. The toilet also includes a concealed trapway and Clean Caps, making it easier to clean and providing a sleek appearance without exposed pipes. Made from durable vitreous china ceramic, it has a smooth white finish that resists stains and scratches. The included seat is a high-density polyethylene Quiet-Close type that prevents slamming and remains securely in place. The left-hand trip lever is standard and easy to operate.

Weighing 94 pounds, the toilet is somewhat heavy and may require two people for safe installation. While the flushing system is powerful, some users might prefer dual-flush models for more water-saving flexibility during light use. Additionally, the left-hand lever placement may not suit all bathroom layouts, so verifying compatibility before purchase is recommended. This KOHLER toilet is suitable for those seeking a comfortable, efficient, and easy-to-clean one-piece toilet with a modern design, especially in smaller bathrooms where space-saving is important.

The TOTO WASHLET+ Nexus One-Piece Toilet is an elongated-shaped toilet, which many find more comfortable compared to round bowl designs. The integrated WASHLET+ bidet seat offers a variety of luxurious features including warm water washing, an auto open/close lid, a heated seat, and a warm air dryer. These features can greatly enhance the user experience with customizable settings for temperature and pressure.

Furthermore, the EWATER+ system mists the wand and toilet bowl, helping to keep the unit clean without harsh chemicals. The toilet uses a 1.28 gallons per flush (GPF) system, making it water-efficient and eco-friendly. At 27 inches in height, it is a comfortable height for most users, and its sleek design hides water supply and power cords for a cleaner look.

The toilet and bidet are made from a combination of ceramic and plastic materials, finished in a cotton white color, which can easily fit into most bathroom decors. One potential downside is its relatively high weight at 116 pounds, which might make installation more challenging. Additionally, the bidet seat is made of plastic, which may not feel as premium as other materials. The contemporary design and array of features make it a great choice for those looking to upgrade their bathroom experience with advanced convenience and cleanliness features.

The TOTO TCST624CEFGAT4001 Legato is an elegant one-piece, elongated chair height toilet that's designed for user convenience and maintenance ease. Its Tornado Flush Technology ensures efficient and thorough flushing, using just 1.28 gallons per flush, which helps save water without compromising performance.

The elongated bowl shape provides additional comfort and the chair height design makes it easier for most users to sit and stand, particularly beneficial for those with mobility issues. The skirted design simplifies cleaning, as there are fewer crevices for dirt to accumulate. Made from durable materials and finished in a clean cotton white, this toilet is both sturdy and aesthetically pleasing.

However, the product does not come with a seat, which means you will need to purchase one separately, potentially adding to the cost. Additionally, its weight of 111.8 pounds might require additional help or professional installation. This toilet is a solid choice for anyone looking for a reliable, easy-to-maintain fixture with a modern design.