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Toilet Review

American Standard H2Option Dual Flush Toilet Review: Powerful Waste Clearing with Water Saving Dual Flush

Real specs, MaP flush scores and aggregated owner feedback — no paid placements.

Why Trust This Review

Review updated June 2026.

Quick Verdict

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.

SpecValue
MaP Score600g
GPF1.28 / 0.92 gallons per flush
Flush SystemDual flush siphon
Trapway Size2.375-inch fully glazed
HeightChair height (16.5 in)
Rough-In12-inch
Seat IncludedYes
WaterSenseYes
WarrantyLimited lifetime
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How powerful is the American Standard H2Option flush?

The H2Option achieves a MaP score of 600 grams, meaning it can clear 600 grams of solid waste in a single flush. This is a strong performance for a dual flush toilet, placing it well above the 350-gram minimum recommended for residential use.

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.

Expert Take

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.

How water-efficient is the American Standard H2Option?

The H2Option uses 1.28 gallons per full flush and 0.92 gallons per partial flush, making it WaterSense certified. This dual flush system can save significant water compared to older 1.6 GPF toilets, especially with the partial flush option for liquid waste.

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.

Expert Take

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.

What do owners say about the American Standard H2Option?

Owners generally praise the H2Option for its strong flush performance, water savings, and comfortable chair height. Common criticisms include occasional issues with the dual flush mechanism sticking and the seat feeling less premium than expected.

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.

Expert Take

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.

How does the American Standard H2Option compare to similar toilets?

Compared to the Toto Drake II, the H2Option offers a similar MaP score of 600g versus the Drake II's 1000g, but the H2Option has a lower partial flush volume of 0.92 GPF versus the Drake II's single 1.28 GPF. The H2Option includes a seat, while the Drake II does not.

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.

Expert Take

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.

Good fit if you...

  • Want a dual flush toilet that saves water with a 0.92 GPF partial flush option
  • Need a chair height toilet for comfort or accessibility
  • Prefer a toilet that includes a seat out of the box
  • Value WaterSense certification for efficiency and potential rebates

Skip it if you...

  • Require the highest possible MaP score above 600g for heavy commercial use
  • Want CEFIONTECT anti-microbial glaze on the bowl surface
  • Prefer a single-flush design without dual flush buttons

Frequently Asked Questions

What does the MaP score of 600g mean for the H2Option?

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.

Is the American Standard H2Option WaterSense certified?

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.

Does the H2Option come with a seat?

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.

What is the difference between EverClean and CEFIONTECT?

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.

What rough-in size does the H2Option require?

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.

How tall is the H2Option toilet?

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.

Does the H2Option use a pressure-assisted flush?

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.

What is the trapway size on the H2Option?

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.

How long is the warranty on the H2Option?

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.

Can the H2Option handle heavy waste loads?

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.

Is the H2Option easy to install?

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.

Does the H2Option have a slow-close seat?

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.

Sources

  • MaP Flush Testing Program, map-testing.com
  • EPA WaterSense, epa.gov/watersense
  • Manufacturer published specifications

Our Verdict

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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How we rank & our data sources

We do not run physical lab tests. Rankings are built from published, verifiable data and real owner feedback, never paid placement.

Researched by BFT Editorial Team · Last updated June 30, 2026 · Our review method

B
Researched by BFT Editorial Team

The Best Flushing Toilets editorial team researches MaP flush scores, water efficiency data, and owner feedback to help you find the right toilet.

Updated June 2026 · Toilet Reviews
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