The best dual flush toilets save water every day without sacrificing flushing power. A dual flush toilet has two buttons: a partial flush for liquid waste and a full flush for solids. Because most flushes only need the smaller volume, a household can save thousands of gallons of water each year.
To help you choose, we compared five popular models from Gerber, HOROW, DeerValley, and American Standard. We judged each one on flushing performance, water savings, comfort, and ease of cleaning. Our quick verdict: the Gerber Maxwell Select is the best overall pick, the HOROW T0338W is the best one-piece value, and the DeerValley Compact is the best choice for small bathrooms.
Best Dual Flush Toilets: Top Picks Compared
Our top picks are the HOROW T0338W One Piece Toilet ADA Chair, the DeerValley Compact One Piece Toilet, and the American Standard Champion 4 One Piece Elongated.
Pros
- Exceptional flush performance with fast refill, as noted in customer reviews.
- Easy, tool-free installation saves time and frustration.
- Quiet operation and sturdy soft-close seat add comfort and durability.
- Water-efficient dual flush lowers utility costs while maintaining strong flushing power.
- ADA comfort height is ideal for adults and accessible bathrooms.
Cons
- Heavy at 81.9 pounds, may require two people for safe installation.
- Two-piece design has more seams and crevices than a one-piece toilet, which may require extra cleaning effort.
- Some users may prefer a traditional handle over the push-button flush mechanism.
The Gerber Maxwell Select Elongated Two-Piece Dual-Flush Toilet combines water efficiency with powerful performance, making it a smart choice for modern bathrooms. Designed for homes, rental properties, or high-traffic areas, this ADA-compliant comfort height toilet offers easy access and reliable flushing. With a dual-flush system that provides both 1.0 and 1.28 gallons per flush, it helps reduce water usage without compromising on waste removal.
Standout features include the tool-free ReadySet installation kit, which includes a wax ring and all mounting hardware for a fast setup. The soft-close elongated seat prevents slamming and enhances safety, while the smooth glazed trapway and canister flush valve deliver virtually clog-free performance. Customer reviews highlight its quiet operation, fast refill, and sturdy construction, with many praising the easy installation and great value.
Design and build quality are solid, with a durable ceramic bowl and polypropylene seat that feels substantial. The two-piece design fits most standard bathrooms and complements a variety of decors. However, at 81.9 pounds, the toilet is heavy and may require two people to lift and position during installation. Additionally, two-piece toilets have more crevices than one-piece models, which could mean slightly more cleaning effort over time.
Potential drawbacks are minor: the push-button flush may take some getting used to for those accustomed to a handle, and the weight could be a challenge for solo installers. Overall, these are outweighed by the toilet's excellent performance, water savings, and positive user feedback. Most reviewers give it five stars, noting its reliability and ease of use.
Verdict: The Gerber Maxwell Select is a top-tier dual-flush toilet that delivers on its promises of efficiency, comfort, and durability. It is an excellent upgrade for any bathroom, especially for those seeking ADA compliance or water savings. With a near-perfect rating and a price that offers great value, it is highly recommended for homeowners and landlords alike.
Brand: Gerber
Model: GRD49210E
Type: Two-Piece Toilet
Color: White
Shape: Elongated Oval
Dimensions: 28.5 in D x 17.5 in W x 31 in H
Weight: 81.9 lbs
Material: Ceramic bowl, Polypropylene seat
Flush Type: Dual-flush (1.0 and 1.28 GPF)
Installation: Floor mounted, tool-free kit included
Included Components: Toilet bowl, tank, soft-close seat, wax ring, mounting hardware
ADA Compliant: Yes (comfort height)
Pros
- Seamless one-piece design is easy to wipe down and looks modern.
- ADA chair height makes sitting and standing easier for all users.
- Strong siphon flush and dual flush option save water without sacrificing performance.
- Soft-close seat reduces noise and adds convenience.
- Includes all necessary installation hardware, simplifying setup.
Cons
- Installation can be challenging due to heavy weight and limited access to tightening bolts.
- Side access holes for mounting bolts are small, making wrench work difficult.
- Compact tank may require careful alignment with existing plumbing.
The HOROW T0338W is a compact one-piece toilet designed for small bathrooms and users seeking ADA-compliant comfort. Its 17.3 inch seat height makes it easier for seniors and those with mobility challenges to sit and stand.
Standout features include a dual flush system (1.1/1.6 GPF) paired with a fully glazed 2 inch trapway and siphon flushing. This combination delivers powerful waste removal while saving water, and the soft-close seat adds a touch of quiet convenience.
Built from durable ceramic with a sleek, skirted design, the toilet measures 26.6 inches deep by 15 inches wide by 26 inches high. The seamless exterior is easy to clean, though the unit weighs nearly 100 pounds, requiring careful handling during installation.
Some users report that the side access holes for mounting bolts are small, making tightening difficult. The weight also makes centering on the flange tricky, but the included hardware and clear instructions help offset these challenges.
Overall, the HOROW T0338W offers excellent value for its price. It combines space-saving dimensions, accessibility features, and reliable performance, making it a top choice for small bathrooms and users who prioritize comfort and ease of cleaning.
Brand: HOROW
Model: T0338W
Dimensions: 26.6" D x 15" W x 26" H
Weight: 99.2 pounds
Material: Ceramic
Seat Material: Plastic (soft-close)
Flush Type: Siphon, dual flush (1.1/1.6 GPF)
Rough-In: 10 inches or 12 inches (selectable)
Warranty: 1 year limited
Pros
- Compact size ideal for small bathrooms and guest toilets
- Water-saving dual flush with powerful performance
- Skirted design simplifies cleaning significantly
- Soft-close seat included for quiet, comfortable use
- Standard height round bowl fits most users comfortably
Cons
- Round bowl offers less legroom than elongated models
- Heavy at 78 pounds, so installation may require two people
- Fixed 12-inch rough-in may not suit all existing plumbing configurations
The DeerValley Compact One Piece Toilet is a space-saving solution for small bathrooms, half baths, and guest powder rooms. Its round bowl and standard seat height provide a comfortable, ergonomic sitting position while keeping the footprint tight at just under 25 inches deep and 13 inches wide.
Performance is a strong point. The dual flush system offers a 1.1 GPF liquid flush and a 1.6 GPF solid flush, using up to 60 percent less water than older 3.5 GPF models. That can save roughly 16,500 gallons per year, yet the flushing action remains powerful and quiet, making it a smart choice for water-conscious households.
The fully skirted ceramic body is a standout design feature. It eliminates the usual nooks and crevices around the base and trapway, so cleaning is simply a quick wipe. The included soft-close PP seat adds a touch of comfort and operates at just 28dB, preventing noisy slams on late-night trips.
One thing to consider is that the round bowl provides less surface area than an elongated model, and the toilet is fairly heavy at 78 pounds, so installation may require two people. Also, it is designed for a standard 12-inch rough-in, so be sure to measure your existing plumbing before ordering.
Overall, the DeerValley compact one-piece toilet delivers a strong combination of water efficiency, easy maintenance, and space-saving design for the price. With a complete installation kit and a one-year warranty, it is a solid upgrade for smaller bathrooms that still need full-size comfort.
Pros
- Exceptional flushing power with a 4-inch valve and glazed trapway
- Low-maintenance one-piece design with EverClean antimicrobial surface
- Comfortable chair-height seating with slow-close seat included
- Backed by a limited 10-year warranty from American Standard
Cons
- Heavy at 115 pounds, may require two people for installation
- Some users may find the elongated shape too long for smaller bathrooms
- Included seat is plastic, not as premium as wood or cushioned options
The American Standard Champion 4 is a one-piece elongated toilet engineered for demanding households. With a 4-inch flush valve and a 2-3/8-inch fully glazed trapway, this model promises powerful, clog-free performance. It is designed for anyone who prioritizes reliability and easy maintenance in a bathroom fixture.
The toilet features a chair-height bowl at 16.5 inches, which makes sitting and standing significantly easier. This is especially beneficial for older adults, taller individuals, or anyone with mobility concerns. The elongated shape also provides a more spacious interior surface for enhanced comfort.
Build quality is solid, with a seamless one-piece construction in durable vitreous china. The EverClean surface helps inhibit stains and odor-causing bacteria, reducing the frequency of deep cleaning. A slow-close toilet seat and chrome trip lever are included, so no extra purchases are necessary.
Potential drawbacks include the toilet's substantial weight, which can make installation a two-person job. The included seat is plastic, which may not appeal to those wanting a softer or more premium feel. Also, the elongated footprint may not suit very compact powder rooms, so measuring your space is advised.
Overall, the American Standard Champion 4 delivers outstanding flushing power and low-maintenance operation in a comfortable, accessible package. Its 10-year limited warranty provides added peace of mind. For homeowners seeking a reliable, easy-to-clean toilet, this model is a strong contender.
How Dual Flush Toilets Work
A dual flush toilet uses a special valve instead of a traditional flapper. Pressing the smaller button releases part of the tank, often about 0.8 to 1.1 gallons. Pressing the larger button releases the full volume, usually 1.28 to 1.6 gallons. Many dual flush systems also use a wider valve opening, which helps water enter the bowl quickly and improves cleaning.
How to Choose the Best Dual Flush Toilets
The right choice comes down to flushing performance, water use per flush, one-piece or two-piece, and seat height.
- Flushing Performance: Water savings mean little if you need to flush twice. Look for strong reviews and, when available, a high MaP score. The Gerber Maxwell Select and HOROW T0338W both offer powerful flushes.
- Water Use per Flush: Compare the partial and full flush volumes. Lower numbers save more water, but the full flush should still be strong enough for solids.
- One-Piece or Two-Piece: One-piece models, such as the HOROW and DeerValley, are easier to clean and look sleek. Two-piece designs are usually cheaper and easier to move.
- Seat Height: Comfort-height models are 17 to 19 inches tall. The Gerber Maxwell Select and HOROW T0338W both meet ADA guidelines. The DeerValley Compact uses standard height, which suits children and shorter adults.
- Bowl Shape and Size: Elongated bowls are more comfortable for adults, while round bowls save space. The DeerValley Compact has a round bowl and a small footprint for tight bathrooms.
- Extras: A soft-close seat, a glazed trapway, and tool-free installation add convenience. The Gerber Maxwell Select includes a quiet soft-close seat and installs without tools.
Dual Flush Toilets: Dual Flush vs. Single Flush
Single flush toilets use the same volume for every flush. Some, like the American Standard Champion 4, are known for exceptional power and clog resistance. Dual flush designs, like the American Standard H2Option, save more water over time. If water efficiency is your priority, choose dual flush. If you deal with frequent clogs, a high-power single flush model may be better. For maximum flushing strength, read our guide to the best power flush toilet.
Everyday Usage Tips
- Use the small button for liquid waste and the large button for solids.
- Clean the flush valve seal every few months to prevent slow leaks.
- Avoid flushing wipes, even if they are labeled flushable.
- If the bowl does not clear, check the tank water level before you assume the toilet is weak.
Final Verdict on the Best Dual Flush Toilets
After comparing these models, we recommend the Gerber Maxwell Select as the best overall choice. It offers a strong dual flush, ADA height, a soft-close seat, and tool-free installation. If you want a sleek one-piece model at a good price, the HOROW T0338W is an excellent value. If your bathroom is small, the DeerValley Compact saves space and water.
Dual Flush Toilets FAQs
Common questions from buyers include “Which button should I press?” and “Can I convert my toilet to dual flush?”.
Are dual flush toilets worth it?
Yes. Dual flush toilets reduce water use and can lower your water bill, especially in larger households.
Do dual flush toilets clog more often?
Not when they are well designed. Modern dual flush toilets use wide valves and glazed trapways that flush efficiently.
How much water does a dual flush toilet save?
A family can save several thousand gallons per year compared with an older single flush toilet, depending on usage.
Which button should I press?
Press the small button for liquid waste and the large button for solid waste.
Can I convert my toilet to dual flush?
Yes. Conversion kits are available, but results vary. Replacing the toilet usually gives better performance.
For more choices, browse our best toilets category or our guide to the best toilets.
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