10 Best Rear Drain Toilet 2026 in the United States

The TOTO Drake Two-Piece Elongated Toilet offers a mix of powerful performance and modern design. Its TORNADO FLUSH system ensures effective cleaning with a circular water motion, combined with the CEFIONTECT glaze to prevent waste buildup, meaning less frequent cleaning for you. The standard height may be more comfortable for those who prefer a traditional toilet height over taller options.

With a 1.6 gallons per flush rate, it conserves water without compromising on the flushing power, thanks to the wide 3-inch flush valve and siphon jet bowl. This makes it efficient, ensuring waste is cleared in one go. The elongated bowl shape adds comfort while the cotton white finish suits various bathroom décors.

It is relatively easy to install, fitting into 12-inch rough-in spaces. However, you will need to purchase the wax ring, flange bolts, and water supply lines separately, which adds to the installation cost. At 89 pounds, it is quite heavy, so handling during installation may require an extra pair of hands. Despite these minor drawbacks, the TOTO Drake stands out for its reliable performance, water efficiency, and sleek design that can enhance any bathroom.

The Kohler K-3578-0 Two-Piece Elongated Toilet Bowl is a solid option for those looking for a rear-drain toilet. The elongated bowl shape provides added room and comfort, which can be a significant advantage for users seeking extra space. The 'Comfort Height' feature, which mimics chair-height seating, makes it easier for most adults to sit down and stand up, enhancing accessibility and comfort.

The toilet uses a Sloan FLUSHMATE system, providing powerful and effective flushes that ensure cleanliness with a single use. The water consumption rate is 1 gallon per flush (GPF), which is efficient and helps in water conservation, making it an eco-friendly choice certified by WaterSense. However, the toilet uses a gravity flush system, which might not be as effective as pressure-assisted flushes in some scenarios.

The vitreous china material offers durability and an easy-to-clean surface, maintaining a pristine look over time. Installation is floor-mounted, which is standard and relatively straightforward for most users. The noise level isn't specifically mentioned, but gravity flush systems are typically quieter than pressure-assisted models. Aesthetically, the toilet has a clean, white finish with a polished chrome trip lever, fitting well into most bathroom designs. This toilet may be best suited for users looking for comfort and water efficiency who don't mind a slightly higher installation effort due to its two-piece design.

The American Standard Yorkville El Pa 1.6Gpf Comb White rear-drain toilet is a durable and efficient option for those looking for a floor-mounted, back-outlet toilet. One of its standout features is the pressure-assisted siphon jet action, which ensures a powerful flush and can be especially useful in minimizing clogs. Additionally, it has a high-efficiency ultra-low water consumption rate of 1.1 gallons per flush, which helps conserve water and reduce utility bills.

The toilet also features a permanent EverClean surface that helps maintain cleanliness by resisting mold, mildew, and bacteria, which is a significant advantage for hygiene-conscious users. The standard 15-inch rim height makes it a comfortable choice for most adults, and the 2-1/8-inch fully-glazed trapway helps in smooth waste passage, further enhancing its efficiency. However, this toilet might be on the heavier side with a weight of 107 pounds, which could make installation a bit challenging. The design is unobtrusive with its white finish and chrome-plated metal trip lever, blending well with most bathroom aesthetics.

On the downside, the noise level might be higher due to its pressure-assisted flush system. The product comes with a limited 1-year warranty, which is relatively short compared to some other brands. It also does not come with a toilet seat, so that will need to be purchased separately. This toilet suits those looking for an efficient and powerful rear-drain system, particularly in a high-usage environment where water conservation is important.