Best Dual Flush Button Toilets: Water Saving Picks

The TOTO Aquia IV is the strongest all-around dual flush button toilet available, combining the lowest practical partial flush volume with a full flush powerful enough to eliminate double flushing in nearly every household scenario.

The Aquia IV uses the same Dynamax Tornado flush found in TOTO's single flush models, which means two powerful rim jets swirl water the full length of the bowl rather than relying on a single water surge from the back. The result is a full flush that reaches a perfect 1,000 grams on the MaP test while consuming only 1.28 gallons, and a partial flush that at 0.8 gallons sits at the absolute floor of what a gravity flush can reliably achieve. Owner reviews consistently note that the full button rarely needs a second press for solids, which is the most common complaint about lower-quality dual flush designs.

The chrome two-button actuator on the tank lid is flush-mounted and has a clean tactile click. The skirted trapway means there is no exposed porcelain foot for cleaning around, which is a practical advantage in bathrooms that see daily use. TOTO's CeFiONtect glaze, applied to the inner bowl, resists particle adhesion and keeps the bowl cleaner between uses. The 1-year limited warranty is shorter than some competitors, but TOTO's parts availability and service network are among the strongest of any toilet brand in North America.

The Aquia IV Cube delivers the same proven 0.8 / 1.28 GPF Tornado flush performance as the standard Aquia IV but wraps it in a sharp rectangular silhouette that suits modern and minimalist bathrooms better than any rounded tank design on this list.

The Cube shares every internal component with the standard Aquia IV, including the Dynamax Tornado jet system, CeFiONtect glaze, and the chrome dual button actuator. The performance distinction between the two is zero; the choice is purely aesthetic. The square tank profile pairs well with wall-mounted vanities, frameless mirrors, and rectangular tile layouts that have become common in bathroom remodels since 2020.

Owner reviews for the Aquia IV Cube track closely with those for the standard model, with flush reliability and bowl cleanliness rated highly. A small number of reviewers note that the square tank can be slightly harder to reach the inside of for occasional cleaning, but the CeFiONtect surface reduces how often tank interior cleaning is actually necessary. WaterSense certification applies to both Aquia IV variants.

The Woodbridge T-0001 posts the highest MaP gram score on this list at 1000 grams on its full flush, outperforming models from brands that cost significantly more, while still delivering a 1.0 GPF partial flush that keeps daily water use low.

The T-0001 uses a 1.6 gallon full flush, which is a higher volume than the WaterSense threshold of 1.28 gallons. Its partial flush at 1.0 GPF brings the weighted daily average down considerably, and EPA WaterSense certifies the toilet based on that average. However, buyers prioritizing absolute minimum water use per flush should note that the full button uses 0.32 gallons more than the 1.28 GPF ceiling of most competitors here. What the T-0001 gains is flush force: 1000 grams MaP is the top score on independent testing and means this toilet handles heavy waste loads, household members who are resistant to splitting the two buttons appropriately, and older drain lines with marginal slope.

The soft-close seat is included in the box, which saves a $30 to $60 purchase that other manufacturers leave to the buyer. The skirted one-piece body cleans with a single pass of a damp cloth. Owner reviews cite strong flush performance and easy installation, though a meaningful minority note that the dual button mechanism required adjustment within the first year, which is consistent with canister valve designs in the mid-range category.

The American Standard H2Option delivers a 1000-gram MaP score on its 1.28 GPF full flush, which means it clears solids at maximum tested capacity while staying within the WaterSense efficiency threshold, a combination no competitor in this price range matches.

The H2Option was the model that established American Standard's credibility in the dual flush button category. The full flush button routes 1.28 gallons through a large 2-3/8 inch fully glazed trapway, and the siphon jet positions water directly at the trap exit for maximum hydraulic pull. The combination of those two design choices -- trapway size and jet placement -- is why the model scores 1000 grams on the MaP test at the WaterSense-compliant 1.28 GPF limit.

The partial flush at 0.92 GPF is not as low as the 0.8 GPF leaders, but it is well below the 1.28 GPF WaterSense ceiling and still saves substantial water on liquid-only flushes. The EverClean antimicrobial surface uses a silver compound fused into the bowl glaze during manufacturing, reducing bacteria growth between cleanings according to American Standard's published testing. Owner reviews are largely positive, with consistent praise for first-flush reliability and criticism from a smaller group who note the two-piece design requires slightly more cleaning effort around the tank base.

The Swiss Madison St. Tropez is a fully skirted one-piece with a 0.8 / 1.28 GPF dual button and a clean rectangular silhouette that competes on design with toilets costing considerably more, making it the top pick for design-forward renovations on a controlled budget.

Swiss Madison entered the North American market more recently than TOTO, Kohler, or American Standard, and the brand competes primarily on visual design and accessible pricing. The St. Tropez is its flagship model and is frequently photographed in renovation content because of its wall-hung aesthetic achieved in a floor-mounted package. The dual button plate is mounted on the top of the tank lid and features a large and small button clearly sized to communicate which is which.

The 800-gram MaP score on the full button is sufficient for normal household use in most drain configurations. Owner reviews are generally positive about flush performance in the first year of ownership, with a portion of longer-term owners noting that the internal mechanism required adjustment or replacement around the 2 to 3 year mark -- which is somewhat common across skirted one-piece designs from non-legacy brands. Swiss Madison offers a limited warranty and publishes part numbers for the flush valve and fill valve, which helps with independent service.

The Kohler Cimarron Dual Flush is the best way to get Kohler's legendary parts network and long-term reliability in a dual flush button design, with a 1.0 / 1.28 GPF split and a perfect 1,000-gram MaP score that handles heavy household use without double flushing.

Kohler's AquaPiston canister valve is the internal mechanism that distinguishes the Cimarron from cheaper dual flush designs. A canister valve lifts straight up to open 360 degrees of water flow, compared to a flapper's hinged partial opening, and it seals against a rigid seat rather than a flexible rubber ring. The result is a more consistent flush volume and a mechanism that is less prone to the partial-seal leaks that make poorly specified dual flush toilets silently waste water over time.

The Cimarron Dual Flush is available at most major home improvement retailers in North America, which means the toilet, the canister valve, and the fill valve are all replaceable without ordering specialty parts online. That parts accessibility is a practical advantage in rental properties, vacation homes, and any application where prompt local repair matters more than minimum purchase cost. Owner reviews consistently rate the Kohler flush quality highly, with the AquaPiston design cited as a long-term reliability improvement over the lever-flush Cimarron models.

The Gerber Viper Dual Flush delivers an 800-gram MaP score and 1.1 / 1.28 GPF dual button performance at a price that makes multi-unit installations feasible, without sacrificing the flush reliability that protects builders from callback calls.

Gerber is a professional-grade plumbing brand owned by Globe Union, and its products are specified by contractors and building supply distributors rather than marketed to retail consumers. The Viper Dual Flush is designed for serviceability, with standard parts, a simple internal mechanism, and a two-piece construction that allows individual component replacement without removing the entire toilet. The dual button plate is conventional chrome and clearly labeled.

The partial flush at 1.1 GPF is the highest on this list, which means the daily water savings versus a single flush 1.28 GPF model are smaller than with the 0.8 GPF leaders. In a contractor or rental context, however, 1.1 GPF partial flushes still produce meaningful water bill reductions, and the Viper's full flush at 800 grams MaP keeps service calls from clog complaints low. Owner and contractor reviews are consistently positive about the flush mechanism's durability across several years of use.

The Kohler Highline Dual Flush brings the AquaPiston canister valve and a 1.0 / 1.28 GPF dual button to the Highline body, which is one of the most widely installed toilet platforms in North America and has a replacement parts ecosystem to match.

The Kohler Highline has been in continuous production for decades and has one of the broadest installed bases of any toilet model sold in North America. The Dual Flush variant replaces the side-mount lever with a top-of-tank dual button actuator while retaining the Highline bowl, trapway, and comfort height dimensions that most homeowners already know from their existing bathroom. The AquaPiston canister valve carries over from the Cimarron Dual Flush and provides the same seal-reliability benefit.

If you are replacing an existing Highline with a like-for-like model that adds water savings, this is the most straightforward path: the rough-in dimensions are identical, the water supply connection is standard, and the installation involves no surprises. Owner reviews for the Highline Dual Flush are consistently positive, with long-term owners noting the AquaPiston mechanism remains leak-free longer than the older trip lever flapper design it replaced in their bathrooms.