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Review updated June 2026.
The American Standard H2Option delivers a strong 600-gram MaP score with a dual flush system that uses as little as 0.92 gallons per partial flush. It is a solid choice for households wanting water savings without sacrificing flush power, though it lacks the CEFIONTECT glaze found on some other American Standard models.
| Spec | Value |
|---|---|
| MaP Score | 600g |
| GPF | 1.28 / 0.92 gallons per flush |
| Flush System | Dual flush siphon |
| Trapway Size | 2.375-inch fully glazed |
| Height | Chair height (16.5 in) |
| Rough-In | 12-inch |
| Seat Included | Yes |
| WaterSense | Yes |
| Warranty | Limited lifetime |
The MaP (Maximum Performance) score is an independent laboratory test that measures how many grams of waste a toilet can clear. A score of 600g means the H2Option handles heavy loads reliably. The dual flush siphon system uses a larger 1.28-gallon full flush for solids and a smaller 0.92-gallon partial flush for liquids. Owners consistently report that the full flush clears the bowl completely without double flushing, even with substantial waste. The 2.375-inch fully glazed trapway helps prevent clogs by providing a smooth, wide path for waste to exit. While not the absolute highest MaP score on the market, 600g is more than sufficient for most households and represents a solid balance between flush power and water conservation.
The 600-gram MaP score is a reliable indicator that this toilet can handle daily use without clogging. The dual flush design gives you the option to use less water when appropriate, but the full flush still provides enough force for solid waste. The siphon action is quiet compared to pressure-assisted models.
WaterSense certification means the toilet meets EPA criteria for water efficiency and performance. The 1.28-gallon full flush is 20 percent less water than the federal standard of 1.6 GPF, and the 0.92-gallon partial flush uses even less. Over a year, a family of four could save thousands of gallons compared to a standard toilet. The dual flush buttons on the top of the tank let you choose the appropriate flush volume. Owners note that the partial flush is effective for liquid waste and light solids, while the full flush handles everything else. The EverClean surface helps reduce bacteria and mold growth, which can improve hygiene and reduce cleaning frequency. However, note that this model does not include CEFIONTECT glaze, which is American Standard's anti-microbial coating found on some other models.
The combination of 1.28/0.92 GPF and WaterSense certification makes this a genuinely water-saving option. The partial flush is particularly useful for households that want to minimize water usage without sacrificing performance. Just be aware that the EverClean surface is a different technology than CEFIONTECT.
Aggregated reviews from multiple retailers show a consistent pattern. The strongest positive feedback centers on the flush power: many owners say the toilet clears waste effectively even on the partial flush, and they rarely need to double flush. The chair height (16.5 inches) is frequently mentioned as comfortable for adults and those with mobility concerns. The included seat is a plus, though some owners describe it as basic or less substantial than aftermarket options. A recurring negative theme involves the dual flush button mechanism: a small number of owners report that the buttons can stick or require more pressure over time. Installation is generally described as straightforward for a DIY project, with clear instructions. The EverClean surface receives mixed feedback, with some owners noticing less staining and others seeing no significant difference compared to standard porcelain.
Owner feedback aligns with the specs: this toilet performs well on flush power and water efficiency. The seat quality and occasional flush button issues are the main drawbacks. These are not deal-breakers for most buyers, but worth considering if you want a premium feel from the seat.
The Toto Drake II is a popular single-flush toilet with a higher MaP score of 1000g, making it better for extremely heavy waste. However, the H2Option's dual flush capability gives it an edge in water efficiency, especially for households that use the partial flush frequently. The H2Option also includes a seat, which adds value. Another comparison is the Kohler Cimarron, which has a MaP score around 600g but uses a single 1.28 GPF flush. The H2Option's dual flush gives it more flexibility. The H2Option's trapway size of 2.375 inches is standard but fully glazed, which helps prevent clogs. The lack of CEFIONTECT on the H2Option is a differentiator from higher-end American Standard models like the VorMax, which includes that coating. Overall, the H2Option is a strong contender for buyers who prioritize water savings and dual flush functionality over maximum flush power.
The H2Option sits in a middle ground: it offers good flush power and excellent water efficiency, but it is not the top performer in either category. For most households, the 600g MaP score is plenty, and the dual flush saves water. If you need the highest possible MaP score, look at the Toto Drake II.
The MaP score of 600 grams means the toilet can clear 600 grams of solid waste in a single flush. This is considered a strong performance for residential use, well above the 350-gram minimum recommended by plumbing experts.
Yes, the H2Option is WaterSense certified. It meets EPA criteria for water efficiency and performance, using 1.28 gallons per full flush and 0.92 gallons per partial flush.
Yes, the H2Option includes a seat. It is a standard plastic seat that matches the toilet finish. Some owners choose to upgrade to a slow-close or elongated aftermarket seat.
EverClean is a surface treatment that inhibits the growth of bacteria and mold on the porcelain. CEFIONTECT is a different American Standard technology that uses a nano-coating to prevent waste from sticking. The H2Option has EverClean but not CEFIONTECT.
The H2Option is designed for a 12-inch rough-in, which is the standard measurement from the wall to the center of the toilet flange. It is not available in 10-inch or 14-inch rough-in sizes.
The H2Option has a chair height of 16.5 inches from the floor to the top of the seat. This is higher than standard toilets and is designed for comfort, especially for taller individuals or those with mobility issues.
No, the H2Option uses a dual flush siphon system, which relies on gravity and a siphoning action to clear the bowl. It does not use a pressure tank or pump, making it quieter than pressure-assisted models.
The trapway is 2.375 inches and fully glazed. This is a standard size for residential toilets, and the glazing helps prevent waste from sticking and reduces the chance of clogs.
The H2Option comes with a limited lifetime warranty from American Standard. This covers the toilet bowl and tank against defects in materials and workmanship for the original purchaser.
Yes, with a MaP score of 600g, the H2Option can handle heavy waste loads typical of a family home. The full flush at 1.28 GPF provides enough water and siphon force to clear the bowl effectively.
Most owners report that the H2Option is straightforward to install, with clear instructions included. It uses a standard 12-inch rough-in and comes with the necessary hardware. Some users recommend having a second person to help lift the toilet into place.
The included seat is a standard plastic seat, not a slow-close model. If you want a slow-close feature, you will need to purchase an aftermarket seat that fits the elongated bowl shape.
The American Standard H2Option offers a strong 600g MaP score and dual flush water savings with 1.28/0.92 GPF. It includes a seat and is WaterSense certified. It is a reliable choice for most homes, though it lacks CEFIONTECT and the seat is basic.
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Researched by BFT Editorial Team · Last updated June 30, 2026 · Our review method
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