Today's toilets are not just for ease of use and convenience, but also for saving water. Older toilets in America use too much water per flush, wasting thousands of gallons of water a year. Because of this, many are now opting for a Dual-flush toilet, which offers good performance even with reduced water usage.

Dual-flush is a modern flushing system that provides two different flush volumes based on the nature of use: a half flush (usually 0.8/1.0 gallons) for liquid waste, and a full flush (usually 1.28 gallons) for solid waste. It is specially designed because, in most cases (approximately 80%), only liquid waste is flushed.

In this blog, we will discuss The Best Dual-Flush Toilets of 2025, their key features and how to choose the right model for you. If you are considering a bathroom upgrade, a dual-flush toilet may be the best investment for you.

Why Choose a Dual-Flush Toilet for Water Conservation?

Dual-flush toilets efficiently conserve water, much more efficiently than traditional single-flush models (1.6 GPF). The main reason for this is to control the amount of water according to the variation of usage.

According to data from the US Environmental Protection Agency (EPA), if the average American household replaces its old, inefficient toilets with WaterSense-labelled models, it can save an average of 13,000 gallons of water and reduce its water consumption by $170. Upgrading from a 1.6 GPF toilet to a 1.28 GPF (WaterSense Standard) toilet can reduce water usage by approximately. 20% decrease in water usage. This dual-flush technology takes those savings a few notches further.

This is for water conservation. The best water-efficient toilets are very valuable. Currently on the market, Ultra-High Efficiency Toilet (UHET) models, such as the Niagara Stealth or Caroma, save the most water for solid waste. 1.28 GPF and for liquid waste 0.8 GPF, or use less water. These models are recognised as the most water-efficient flushers on the market.

So, it is wise to choose a water-efficient toilet. These eco-friendly toilets will save you a lot of money and valuable natural resources in the long run.

Key Features to Look For in Dual-Flush Toilets

Before buying the best dual-flush toilet, there are some important technical considerations that you, as a plumbing expert, must know.

WaterSense Certification

WaterSense is a voluntary program of the EPA that sets standards for water efficiency and performance of products. Average per flush for a toilet to receive the WaterSense label, 1.28 gallons (GPF) or less must be used, and its flushing performance confirmed by independent testing. This is the first and most important verification for eco-friendly toilets.

GPF rating: Which is better, 1.28 or 1.6 toilet?

GPF or Gallons Per Flush is the amount of water used in each flush.

• 1.6 GPF: It has been a US federal standard since 1994.
• 1.28 GPF: This is the High-Efficiency Toilet (HET) standard and is the minimum threshold for receiving the WaterSense label. This is approximately 1.6 GPF 20% more water efficient.
• 0.8 GPF: It is used by ultra-high efficiency toilets (UHET) and is the best water-saving option for liquid waste.

Typically, on dual-flush models, 0.8 GPF (short flush) and 1.28 GPF (full flush) have a combination of The 1.28 GPF model is clearly better than the 1.6 GPF model for water conservation.

Maximum Performance Score

MaP (Maximum Performance) testing is an industry-wide standard for measuring the flushing performance of toilets. It tests how many grams of solid waste (miso paste/soybean paste substitute) the toilet can effectively remove in a single flush.

• A good MaP score is above 500 grams 
• Best-in-class toilets, 800 to 1000 grams by scoring
• In models with low GPF MaP score is very important; A high MaP score ensures that performance will be maintained even with less water use.

Dual-Flush Mechanism (Liquid vs Solid Waste)

The basic mechanism of a dual-flush toilet works through two flush options (buttons):

• Liquid Waste: Light pressure, low water consumption (0.8-1.0 GPF).
• Solid Waste: Full pressure, high water consumption (1.28 GPF).

Most residential dual-flush toilets are gravity-fed systems that rely on the weight of water. They are quiet and easy to maintain. On the other hand, pressure-assisted flush systems use compressed air to create a very powerful flush (about 1.1-1.2 GPF). They are good for commercial or high-traffic areas, but are generally noisier and have more parts than gravity-flushes.

Top 5 Best Dual-Flush Toilets for Water Conservation

As experts, we have selected these top-rated dual flush toilets water efficiency models by considering functionality (MaP), water efficiency (GPF), and reliability.

Model	Flush (GPF)	Performance (MaP)	Key Features
TOTO Aquia IV/Drake Washlet+	0.8/1.28	800+ (Estimated)	Tornado Flush, Cefiontect Glaze
Swiss Madison Sublime II	0.8/1.28	1000	Modern design, scarred trapway
Caroma Cube	0.8/1.6 (Variable)	800+ (Australian Tech)	Ultra-low flush option, less common in the USA
Kohler Wellworth Dual-Flush	1.1/1.6 (Variable)	800+ (Class Five)	Traditional brand reliability, strong flush
Niagara Stealth Phantom	0.8/1.28	800+ (Ultra High-Efficiency)	Silent flush, UHET technology

1. TOTO Drake Washlet Dual Flush (Reliability + WaterSense Certified)

TOTO is a trusted name in the toilet industry from Japan, known for its cutting-edge toilet water-saving technology. While the 'Drake' model has historically been known for its 1.28 GPF single-flush, the TOTO Drake Washlet+ Dual Flush model combines water efficiency and luxury features in the high-end segment. It primarily uses the TOTO Aquia IV or other dual-flush technology (0.8 / 1.28 GPF).

Pros:

• Tornado Flush System: It uses water rotation to give a very powerful and noiseless flush, which cleans the bowl thoroughly.
• WaterSense Certified: Guaranteed water saving.
• Washlet+ Compatibility: Luxury features like a self-cleaning windshield and heated seats can be added.
• Cefiontect Glaze: Special glaze on the inside of the bowl that prevents waste from sticking.

Cons:

• The price is relatively high.
• Washlet+ requires an electrical outlet.

2. Swiss Madison Sublime II (ultra-low GPF, stylish design)

The Swiss Madison soon became fashionable in America eco-friendly dual flush toilets review 2025 became popular for models. The Sublime II model is sleek, a one-piece famous for design and high performance. This is an ideal 08/1.28 GPF offering a dual-flush combination. Its fully skirted trapway makes it extremely easy to clean.

Pros:

• MaP 1000 Score: This ensures the highest level of flushing performance.
• Ultra-Low Flush: The 0.8 GPF option saves tremendous water.
• Modern Aesthetic: One-piece design, perfect for small bathrooms.
• Budget-Friendly IT: A premium look at a slightly lower price than Toto or Kohler.

Cons:

• Since the brand is new, there may be questions about long-term reliability.
• Some users question the quality of the flush lever.

3. Caroma Cube (0.8 Gallon Flush, Australian Design)

Caroma is an Australian brand that plays a leading role in water conservation. Their models often feature flushes of 0.8 GPF or less. The Caroma Cube is one of their design-focused models, which 0.8 GPF and 1.6 GPF comes with dual-flush option. Although the 1.6 GPF full flush may be excluded from WaterSense certification, its 0.8 GPF option saves the most water.

Pros:

• Unmatched Water Savings: The 0.8 GPF flush is one of the lowest water-using options on the American market.
• Smart Design: Modern, compact design.
• Large Trapway: Due to the Australian design, it is very effective in preventing clogging.

Cons:

• It does not fully meet the WaterSense criteria for the 1.6 GPF option.
• Its parts and retail supply in the US can be a bit difficult.

4. Kohler Wellworth Dual-Flush 

Kohler is one of America's most trusted plumbing brands. The Wellworth line is known for its reliable gravity flush and robust performance. Wellworth's dual-flush version is typical; 1.1/1.6 GPF comes in combinations (but also has a 1.28 GPF dual-flush model). This is Kohler's famous Class Five Flushing Technology, which ensures powerful waste removal while using less water.

Pros:

• Trusted US Brand: High-quality customer service and comprehensive warranty.
• Class Five Technology: Known for strong, one-time flush performance.
• Plumber-Recommended: Installation is easy and spare parts are readily available.

Cons:

• Due to the 1.6 GPF option, it may not be the most water-efficient.
• The design is not as modern as Swiss Madison or TOTO.

5. Niagara Stealth Phantom 

If your main goal is ultra-high efficiency toilets and maximum water savings, but Niagara's Stealth Phantom or Stealth line are the best. This single-flush 0.8 GPF or Dual-Flush 0.8/1.28 GPF Options are available. Niagara has designed its flush technology to work quickly and efficiently using very little water, making it extremely quiet.

Pros:

• Best Water Conservation: With a 0.8 GPF flush, it is one of the most water-efficient toilets on the market.
• Silent Flush: Its special technology makes the flush almost non-noise.
• MaP Performance: Despite its low water consumption, it can maintain a high MaP score.

Cons:

• The water level in the flush bowl may be slightly low.
• Being a relatively new technology, maintenance may not be easy.

Dual-Flush vs Other Toilet Types

Depending on your needs and environmental goals best water-efficient toilets can be determined.

Dual-flush vs Single-flush

characteristics	Dual-Flush (0.8/1.28 GPF)	Single-Flush (1.28 GPF)
Daily water consumption	Much less, because 80% of the flush uses 0.8 GPF.	Constant 1.28 GPF per flush.
savings	Saves the most water.	Less cost-effective than dual-flush.
Simplicity	Two flush buttons.	A flush lever/button.

Dual-Flush vs Pressure-Assisted Toilets

Pressure-assisted toilets flush the water tank with compressed air, creating an ultra-powerful flush.

• Performance: Undoubtedly, the pressure-assisted toilet flush is the most powerful and clog-resistant. It typically uses 1.1-1.2 GPF of water, which meets WaterSense criteria.
• Maintenance and sound: Pressure-assisted models are usually very loud and require special parts for maintenance and repair. On the other hand, dual-flush (gravity) models are quieter and easier to maintain.
• Do plumbers recommend dual flush toilets? Experienced plumbers generally recommend high-quality gravity-flush or dual-flush models (such as TOTO, Kohler) for residential use, as they are reliable, easy to repair, and strong enough. Pressure-assisted models are more recommended for commercial use.

Ways to maximize water savings from your toilet

There are other steps you can take to increase your water savings after installing a dual-flush toilet.

1. Correct use of half/full flush

Users must be aware of the correct use of small buttons (liquid) and large buttons (solid). Use the small flush only for liquid waste. This is the main strategy for using your water-saving toilet kit.

2. Regular maintenance and leak checks

Toilet leaks are one of the biggest causes of water wastage in the home. One leak per day 200 gallons can waste water up to

• Simple ways to check for leaks: Add some food coloring to the flush tank. If the water in the bowl turns colored after 15 minutes, you should know that your toilet is leaking.
• How to make a toilet flush use less water: Regularly check the seal of the flush valve connecting the tank and bowl and the filler valve.

3. Combination with other eco-fixtures

complete water conservation bathroom upgrades other WaterSense-labelled fixtures with your dual-flush toilet to:

• Low-flow showerheads that use 2.0 gallons or less of water per minute.
• Watersense Faucets: which restricts the flow of water from the bathroom faucet.

4. Rebates and tax incentives

Many states and local water utilities in the United States offer rebates or tax incentives for the purchase of WaterSense-certified toilets. Check with your local utility provider to find out if this is an affordable water-saving toilet kit. Whether you are getting any financial benefit from installing.

American Bath's recommendations

At American Bath, we are committed to providing only the best quality plumbing fixtures. Our team of experts analyzes the effectiveness and long-term reliability of every low-flow dual flush technology available on the market. In our opinion, the best dual-flush toilets are those that meet your home’s water conservation goals without compromising on flushing performance.

Our curated collection ensures that you only get high MaP scores and WaterSense-certified models. We believe that making an eco-friendly bathroom upgrade in your home will not only reduce your monthly bill but also increase the value of your home.

Ready to upgrade to a water-saving dual-flush toilet? Don’t delay! Check out our curated collection of American Bath toilets now, featuring top brands like TOTO, Kohler, and Swiss Madison. 

Our experts can help you choose the perfect WaterSense-certified model that will save water, money, and the planet. Buy dual flush toilets online in the USA the easiest way. Order your next water-saving fixture today!