Selecting a dual flush toilet can lower water use without sacrificing flush performance. The five models chosen here cover a range of styles—from compact, one-piece designs to classic two-piece configurations—each offering efficient dual-flush options and reliable performance. WaterSense certification is common among these picks, and many boast high MaP scores for solid bowl clearing. The table below provides quick-reference details to help compare flush ranges, heights, and installation considerations at a glance.
| Product | Brand | Flush Range | Height | Notes |
|---|---|---|---|---|
| H2Option Two-Piece | American Standard | 0.92/1.28 gpf | Chair Height | Elongated front; WaterSense; MaP 1000 g |
| Casta Diva Elongated One-Piece | CASTA DIVA | 1.1/1.6 gpf | ADA Comfort Height | Seamless one-piece; powerful siphon flush |
| St. Tropez SM-1T254HB | Swiss Madison | 1.1/1.6 gpf | ADA Height | Vortex dual-flush; skirted design |
| HOROW T0338WM | HOROW | 0.8/1.28 gpf | ADA Height | Matte white; MAP 1000; skirted bowl |
| St. Tropez Two-Piece | Swiss Madison | 1.1/1.6 gpf | 12″ Rough-In | Dual flush; comfort height |
American Standard H2Option Dual Flush Toilet
The American Standard H2Option Two-Piece Toilet emphasizes versatile water management with a dual-flush system designed for efficiency and reliability. Users can choose between 0.92 gpf for liquids and 1.28 gpf for solids, enabling substantial water savings without sacrificing bowl performance. The chrome push-button actuator is mounted on the lid for straightforward operation, supporting quick, intuitive flushing. This model has earned a high MaP score, indicating robust flushing capability, and carries WaterSense certification for consistent environmental performance. It’s suitable for bathrooms requiring an elongated bowl and chair-height seating for comfort and accessibility.
- Dual Flush: 0.92 gpf or 1.28 gpf to minimize water use
- Push-button operation on the lid with a chrome actuator
- MaP 1000 grams and WaterSense certified for reliable performance
Designed as a two-piece configuration, this toilet pairs with an elongated bowl to offer additional seating space. The combination of efficiency and strong flush performance makes it a solid choice for households prioritizing water conservation without compromising waste removal. For installations where a traditional two-piece setup is preferred, the H2Option provides a familiar maintenance path while delivering modern efficiency standards.
Casta Diva Elongated One Piece Dual Flush Toilet
The Casta Diva Elongated One Piece Toilet blends a sleek, seamless design with highly efficient dual-flush performance. The skirted, one-piece construction minimizes crevices and simplifies cleaning, while delivering a modern aesthetic suited to contemporary bathrooms. Dual-flush options of 1.1 gpf for liquids and 1.6 gpf for solids provide strong water savings aligned with EPA criteria. The unit is built with a high-efficiency flush profile and fully glazed trapway for quiet operation and reduced clogging risk. The model supports comfortable seating height and a practical 12-inch rough-in for typical residential bathrooms.
- Skirted one-piece design for easy cleaning
- Dual Flush 1.1 gpf / 1.6 gpf, WaterSense criteria
- MAP-friendly siphon flush with fully glazed trapway
With its elegant silhouette and efficient performance, the Casta Diva option is well-suited for bathrooms aiming to maximize space and modern design without sacrificing flush power. The integrated tank and bowl create a compact footprint, and the dual-flush feature supports ongoing water conservation in daily use. Material and finish details contribute to a low-maintenance profile, making this model a practical fit for master baths or guest powder rooms alike.
Swiss Madison St. Tropez SM-1T254HB One-Piece Dual-Flush Toilet
The Swiss Madison St. Tropez SM-1T254HB One-Piece Elongated Toilet emphasizes a clean, modern silhouette with a high-efficiency, dual-flush system. The Vortex dual-flush design offers reliable waste removal with reduced water usage, delivering 1.1 gpf for liquids and 1.6 gpf for solids. The all-in-one construction integrates the tank and bowl, creating a compact, easy-to-clean profile that’s particularly appealing in contemporary bathrooms. The ADA-height design provides comfortable seating for a broad range of users, while the standard 12-inch rough-in ensures straightforward installation for most homes.
- One-piece design; elongated bowl for comfort
- Dual Flush: 1.1 gpf / 1.6 gpf
- Vortex flushing technology with a high MaP-capable performance
In addition to efficiency, the St. Tropez SM-1T254HB emphasizes aesthetics and ease of maintenance. Its seamless exterior reduces dirt traps and makes cleaning faster, while the dual-flush mechanism provides the flexibility to tailor flush strength to the task at hand. The ADA-height feature also supports accessibility, making this model a versatile choice for both primary baths and shared powder rooms.
Swiss Madison St. Tropez Two-Piece Dual-Flush Toilet
The St. Tropez Two-Piece Elongated Toilet offers a practical two-piece configuration with dual-flush capability designed to balance efficiency and traditional installation preferences. The dual-flush system supports a lower 1.1 gpf light flush and a higher 1.6 gpf full flush, enabling water savings for both liquid and solid waste. With a comfortable 17-19 inch rough-in range, this model accommodates taller users and a range of bathroom layouts. The standard elongated bowl adds extra seating room while maintaining a familiar installation footprint for homeowners upgrading from older, non-ADA models.
- Dual Flush: 1.1 gpf / 1.6 gpf
- Elongated bowl; standard 12″ rough-in option
- ADA-compliant height range; comfortable seating
The St. Tropez Two-Piece combines traditional two-piece construction with modern dual-flush technology. Its balanced performance makes it a strong option for users who prefer a tried-and-true installation approach without sacrificing efficiency. The design emphasizes practical maintenance and ease of replacement parts, contributing to a straightforward upgrade path for households looking to improve water usage and daily reliability.
Buying Guide
When choosing a dual flush toilet, consider these key purchase factors to tailor a selection to your bathroom and budget.
- Flush efficiency and performance: Examine gpf options and MaP scores. Lower gpf (0.8-0.92 gpf) saves more water, but ensure the model achieves a strong flush with typical waste loads. A high MaP score indicates reliable bowl clearing, which reduces the need for repeated flushes.
- Flush options and water conservation: Dual-flush configurations give a light and a full flush. For households with regular flush needs (e.g., families with children), a 1.1/1.6 gpf setup may provide a practical balance between water use and performance.
- Toilet design and cleaning: One-piece toilets with skirted bowls tend to be easier to clean due to fewer crevices. Two-piece designs may offer easier replacement parts and repair options but have more exposed joints to clean.
- Comfort and height: ADA-compliant and chair-height models improve accessibility, making sitting and standing easier for seniors or those with mobility challenges. Consider elongated bowls for comfort in larger bathrooms or households with long-term use expectations.
- Rough-in and space: Most models use a standard 12″ rough-in, but some can fit different spacing. Measure your rough-in distance and room width before selecting a model to ensure proper clearance and installation.
- Maintenance and warranty: Look for glazed trapways and corrosion-resistant components for durability. A solid warranty can provide peace of mind for long-term ownership.
- Style and coordination: If you value a modern look, consider skirted, one-piece designs that offer a sleek profile and easier cleaning. For classic bathrooms, a traditional two-piece model with standard exterior may blend more harmoniously.
In practice, the best choice depends on your priorities: water savings, ease of cleaning, accessibility, and how you plan to install the unit. The five models reviewed here demonstrate a spectrum of options—from compact, low-flow configurations to larger, ADA-compliant designs—so you can identify a model that aligns with both your bathroom layout and daily routines. When shopping, compare flush ranges, height, and rough-in requirements, then weigh maintenance considerations and aesthetic fit to select the optimal dual flush toilet for your home.