Best Dual Flush Toilets 

Dual flush toilets have been around since the 80s, although it took a while for homeowners to catch on to the trend.

These water-saving commodes are designed to decrease the amount of water used per flush, resulting in direct savings on your water bill.

Finding a good dual flush toilet isn’t hard, but the sheer number of options can make this category challenging to navigate.

If you’re looking for the best dual flush toilet, the American Standard H2Option should be at the top of your shopping list.

7 Best Dual Flush Toilets Reviewed

Dual flush commodes can range from a few hundred bucks to thousands of dollars, depending on your needs.

All of our picks are WaterSense certified, and — while beauty is in the eye of the beholder — we chose an array of styles ranging from modern to traditional.

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1. American Standard H2Option Dual Flush Toilet  

When shopping for the best toilet in any style, a few brands appear at the top of every list.

American Standard is one of them, and we feel that this toilet does provide the best overall value between performance and price.

This two-piece toilet is easy to install and clean, and — with a rating of 1.28 gallons per flush for solid waste (and a rating of 0.92 gallons for the secondary flush) — the H2Option is efficient. 

The design helps in these regards, along with the enclosed trapway and EverClean surface. American Standard also uses their PowerWash system on this toilet to ensure a clean flush. 

This efficient comode has a 2.1-inch trapway with a MaP rating of 1,000, which keeps things clog-free.

This particular model is standard height with a round bowl, but there are several options available.

If you prefer something a little taller, the American Standard is available in Comfort or Chair height. You can choose from a round or elongated bowl on either version. 

This top-tier toilet comes with a 5-year warranty on mechanical parts and a lifetime guarantee on Vitreous China.

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2. KOHLER Wellworth Two-Piece Dual Flush Toilet K-3987-98

KOHLER has one of the more extensive collections of dual-flush toilets, whether you’re interested in a one or two-piece design. The Wellworth is our favorite dual-flush toilet from the company, and a great choice for homeowners that enjoy a traditional style.

This standard height toilet sits 14.5 inches from the floor and has a classic round front bowl. It’s not as roomy as other picks on our list, but it does pack a powerful flush. KOHLER uses a 2.1” flush valve in this gravity-fed toilet, along with a trapway of the same size.

This toilet is WaterSense certified at 1.1 or 1.6 gallons per flush, although not quite as efficient as our top choice. It has a traditional left-handed trip lever on the side, instead of the top like many dual flush toilets, which is a nice touch.

The KOHLER Wellworth is an excellent alternative to dual flush toilets with a top-mounted flushing mechanism. It has a high MaP score, and homeowners found this commode easy to install thanks to the company’s DryLock installation system.

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3. TOTO Smart Toilet With Bidet G400

Toilets with an integrated tank have become incredibly popular with homeowners looking for something unique.

TOTO has several models in this class, but the G400 is an amazing dual flush toilet if you want an intelligent commode.

The dual-flushing system of the G400 is impressive, with a rating of 0.9 or 1.28 GPF, although that’s not the real draw. 

That would be the big brain that TOTO gave this toilet that lets it automatically flush itself or open and close the lid.

On top of that, thanks to an adjustable heated seat, there won’t be any cold backsides. 

The bidet feature has three zones, including soft rear cleanse. This smart toilet also allows you to adjust the temperature and pressure of the cleansing water.

This option came in runner-up in our best smart toilet list, but only because of its price.

The Toto Washlet G400 is in the premium class and one of the top options for high-tech homeowners. It has flagship features, but you will want to keep customer support in mind along with the price.

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4. Swiss Madison Sublime II Compact Dual Flush Toilet 

With a seamless design, Swiss Madison Well Made Forever designed the Sublime II to go with any décor.

This classy toilet also has an excellent price point and is incredibly easy for homeowners to clean with a concealed trapway.

The one-piece design and compact bowl on the Swiss Madison SM-1T257 will leave only a small footprint in any bathroom.

The minimalist style is a bonus, along with the side holds and included soft closing seat.

Water conservation is another highlight of the Sublime II — it’s one of the most efficient dual flush toilets at 0.8 gallons per flush for liquid waste and 1.28 gallons per flush for solid waste. 

While compact, this toilet is standard height at 15” from the floor to the toilet bowl.

This minimalistic toilet is affordable and perfect for homeowners that want something simple and compact.

The only drawback is the installation, which can prove challenging depending on some bathrooms because of its size.

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5. TOTO AQUIA IV Elongated Dual Flush Toilet

One of the advantages of purchasing a dual flush toilet is the direct savings on your water bill. While every toilet on our list does just that, the Toto Aquia IV was specially designed for it and produces a strong flush every time.

This is a two-piece toilet, although its design may lead you to believe otherwise. It has a height of 15.5 inches without the seat and an elongated bowl for extra comfort. The surface of the Aquia IV also has a CeFiONtect ceramic glaze which keeps the surfaces clean.

On maximum flush, this toilet is rated at 1.28 GPF. That’s impressive and efficient, but so is the secondary flush at 0.8 GPF. This toilet uses the company’s DynaMax Tornado flush technology and a 2.5-inch trapway to make clogs a thing of the past.

The TOTO Aquia IV is a high-performance toilet and engineered to last. Plus, homeowners appreciate the quiet flushes. 

It’s also easy to install, but you will need a seat and hardware before this toilet is ready to go.

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6. Sheffield Corner Toilet With Elongated Bowl

Bathrooms come in all sizes, but the placement of plumbing dictates where you can use certain fixtures in a home. If you’ve been searching for a toilet that fits in a corner, you’ll want to consider the classy Sheffield Dual Flush toilet.

Reno-Gloss finishing coats this elongated toilet bowl to prevent scratches and keep it stain-free. It’s well-built with a distinct design that’s reminiscent of antique commodes.

The obvious difference is on the tank lid, which is where you’ll find the chrome-plated flushing mechanism.

It sports a large 2.5-inch trapway, and the dual-flush button provides 1.6 gallons per flush on high or 0.8 GPF on low, depending on your needs. It also falls between Chair and Standard height at 16 inches with the seat.

The selection of dual-flush toilets that fit in a corner is sparse, to say the least. But Renovators Supply Manufacturing has produced a winner in the Sheffield, and homeowners feel the same way. 

While it comes with a slow-closing seat, you will need to pick up floor bolts, caps, and a wax ring.

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7. Swiss Madison Well Made Forever Chateau Dual Flush Toilet

Swiss Madison has an array of toilets built for budget-conscious consumers, including several compact models. The Chateau is a unique alternative to the Sublime II and is also the most affordable dual-flush toilet to make our list.

Like the Sublime II, the Swiss Madison Chateau is a gravity flush system with dual flush technology. The flush rating is identical as well, at 0.8 GPF for liquid waste and 1.28 GPF for solid waste. 

It has a chrome mechanism with dual buttons on top of the toilet tank, but that’s where the similarities end. 

The toilet tank on the Chateau is shorter and has a rounded lid, completely changing the vibe of the commode and giving it a more contemporary look.

However, it won’t take up much space despite having an elongated bowl and falls in the comfort height class with the toilet seat attached.

The Swiss Madison Chateau stands out compared to a conventional toilet from a design perspective, and it’s hard to argue with the price tag.

It’s been well regarded by homeowners, although some have had issues with the lid and flushing mechanism out of the box.

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How to Find the Best Dual Flush Toilets for Your Home

Whether you prefer to shop online or locally, you might be surprised by the number of dual-flush toilets with a similar design.

Most share common traits, which is why it’s essential to focus on the key areas we will touch on below.

Gallons Per Flush Rating

The most common specification you’ll encounter with any dual-flush toilet is the GPF rating. This is the flow rate when the toilet is flushed, and is measured in gallons per flush.

This number lets you know how a toilet fares with water conservation. 1.6 gallons per flush is considered standard, but the top dual flush toilets will come in well below that mark. The lower the numbers, the more efficient the toilet is.

In order to meet WaterSense standards, a toilet must use 20% less water than the federal standard of 1.6 gallons per flush.

Flushing Power

How well a toilet actually flushes comes down to several factors, including the flush valve, trapway, and the system itself. 

Pressure-assisted flushing mechanisms ensure a robust and consistently powerful flush. On the downside, these systems are more expensive, noisier, and harder to maintain over time.

Gravity-assisted or siphonic toilets are the most common style of flushing system. They are highly efficient when properly designed and easier to repair.

These toilets are also cheaper, regardless of whether they are a dual or single-flush model.

A larger toilet flush valve will also increase the flushing power of a toilet. The standard is 2 inches, which is around the same size as most trapways. Trapways carry waste and water to the drainpipe and can measure up to 2 3/8 in diameter.

Budget and Style

While the gap has shortened as new manufacturers have entered the industry, dual-flush toilets are still priced at a premium. That’s why one of the first things you should consider is style, which is often tied to price in more ways than one.

One-piece toilets are easier to clean and a great way to update an older bathroom. However, they are more expensive than a two-piece toilet. The location of the trip lever can also have an impact on the design, and most have flushing mechanisms located on the top.

Two other factors that come into consideration with dual-flush toilet prices are the manufacturer and the features. 

Washlets with built-in bidets and smart toilets may have a unique style, but they also have a higher price tag. You can expect to pay a premium from some brands, although the gap has shortened in recent years.

Chair or Standard Height Toilet?

Toilet height is an important factor when homeowners buy a new toilet. The rough-in measurement is critical, but height can make or break your experience with your new commode.

If you are replacing an older toilet, there’s a good chance it is standard height. Toilets in this range measure between 14 to 15 inches from the floor to the top of the bowl.

Standard height toilets are ideal for shorter people, whereas someone taller would be more comfortable with a Chair or Comfort height toilet. These are a few inches higher and make it easier for some people to sit and stand.

For a toilet to be ADA compliant, it must have a rim height of 17 inches or higher with the toilet seat attached.

Toilet Bowl Shape

The height of a toilet can make time spent on the commode more comfortable, but so can the shape of the bowl itself.

Round toilets are considered “standard” and could be what you have in your home now. They are more compact, are easier to fit in smaller bathrooms, and are generally cheaper.

By comparison, elongated toilets have an oval shape and are 2 inches longer than a round bowl. They provide more room and are widely regarded as more comfortable.

This type of toilet bowl also takes up more space, so you’ll need to account for any doors or drawers nearby.

What’s in the Box?

When you order a toilet online, breakage is usually the first concern for most homeowners. While this rarely happens and is covered by the retailer, what’s included should not be overlooked before it arrives.

Two things needed to install a toilet are the bolts and a wax ring. Unfortunately, we found that both can be left off the packing list. You can purchase them at any hardware store locally or online — just remember to use high-quality closet bolts and wax rings.

One surprising omission for many homeowners will be the toilet seat. You can’t use your new toilet without one, but this is something that could be a blessing in disguise.

Regardless of how well-made a toilet is, the included seat is often subpar. It could have too much “wiggle” or simply be uncomfortable.

Our Verdict

Any of the toilets we chose are great choices for homeowners that want to save water with a dual-flush toilet. You don’t need a degree in design or a professional plumber to select one if you follow our tips.

We think the American Standard H2Option Dual Flush Toilet is the best overall choice for most consumers.

It has a very reasonable price tag, a great GPF rate, and a 5-year guarantee on internal parts.

While these toilets are efficient, check out our list of the best no-clog toilets if you are looking for something a bit more powerful.

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