Dual flush toilets provide you the choice between two flush options, saving overall water usage. The partial flush uses about half the amount of water as a full flush, resulting in water savings compared to other types of toilets.
Keep reading to get a better understanding of how the best dual flush toilets work, and reviews of our favorites!
Our Favorite Picks
| › | Kohler Wellworth | |
| › | Most Water Efficient: | TOTO Drake |
| › | TOTO Drake + Washlet S500 | |
| › | Budget Friendly: | American Standard H2Option |
| › | Most Reviewed: | Swiss Madison St. Tropez |
| › | Runner Up: | TOTO Aquia IV |
Dual Flush Button Explained
In most cases, a dual flush toilet will have – a larger and a smaller one. Each button has a purpose.
For liquid waste, you simply press the smaller button and hold it for a short period of time.
For solid waste, you will either press the larger button or press both buttons together, depending on the toilet, which activates a full flush.
Note: If the small flush is not enough, you can immediately press the large button. However, it might take some time to refill the cistern after the small flush.
You may also encounter a dual-flush toilet that has a lever instead of buttons.
Even though the mechanism is different, the principle is the same – press the lever halfway down for a small flush and all the whole way down for a full flush.
Comparison of the Top Dual Flush Toilets
The Dual Flush Toilet Review
1. Kohler Wellworth – Editor’s Choice
- ✅ Flush Type:
- Flush Score:
- Water Consumption: 1.1/1.6
- Bowl Shape:
- Flushing System:
- Style: Two-Piece
Dimensions:
- Toilet – 27-3/4″ x 18″ x 29-1/4″
- – 12″
- – 2-1/8″
- – 15-1/4″
- Rim Height – 14-1/2″
-
- Dual flush with 1.6/1.1 gallons per flush
<li”>Class Five flush system
- EPA WaterSense qualified
- Left hand trip lever
- Some reports of clogs and leaking valves
- Seat not included in purchase
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"The Kohler series is known for its exceptional flushing performance, and the Wellworth toilet is no different."
Flushing System
The Wellworth toilet is a classic model that uses the Class Five dual flush system, well known for its bulk flushing performance. Its 1.6/1.1 gallons per flush system is WaterSense-approved, so you might get rebates on your water bills with this toilet.
Its flush system comprises a direct-fed siphon-jet flush, a 2-1/8 inch, fully glazed trapway, and a large round canister valve. The canister valve and siphon jet deliver a quick, powerful water gush from all sides of the bowl, and the glazed trapway works with the siphoning system to forcefully but quietly expel the waste.
The canister valve also reduces leakages by protecting the seal, a definite upgrade from the 3-inch flapper, and the tank fills up quickly.
Design and Style
The Wellworth has a classic two-piece design with a round bowl that works well in smaller spaces. It is made out of durable vitreous china and is available in three finishes, with the seat and supply line sold separately. This model is unfortunately not ADA compliant, and would be better suited in homes without those needs. It should be quite comfortable for shorter people and children, however.
The Wellworth is also quite easy to install because it features the DryLock install system. I really appreciate that it makes installation foolproof and fast, preventing any leakages that could occur during the installation process.
This model coordinates with other products in Kohler’s Wellworth collection for a streamlined bathroom design.It features a left-side nested trip lever that allows you to conveniently flush the toilet, even while sitting on it.
Additional Fact
- A left hand trip lever leaves the top of the toilet tank available for storage, unlike most dual flush toilets.
Comparison - Wellworth vs. Highline
Here’s a quick comparison of the Wellworth with another of Kohler’s popular toilets, the Highline.
| Wellworth (K-3987) | Highline (K-3999-0) |
| Two pieces | Two pieces |
| 1.6/1.1 gallons per flush | 1.28 gallons per flush |
| Round standard height bowl | Elongated Comfort Height bowl |
| Mid price range | Mid price range |
| Class Five® canister flush | Class Five® canister flush |
| 1,000 MaP | 1,000 MaP |
These two models are very similar, but at a similar price point the Wellworth’s dual flush function provides excellent water savings and ensures you have plenty of flush power and volume when needed.
Color Options
- White
- Biscuit
- Black Black™
Compatible Seats
- K-5589 Purefresh Deodorizing round-front toilet seat
- K-76923 PureWash M250 Quiet-Close round-front toilet seat with antimicrobial agent
Product Documentation
Buying Options
The Kohler Wellworth is available from Lowes, Build.com, Home Depot, and Amazon. The alternative color options are only available from the main Kohler site or Build.com, at a higher price. For the standard white model, Lowes and Home Depot have the lowest cost, but only ship free to a nearby store for pickup, while delivery is available for a fee. Amazon currently lists a slightly higher price, but includes free shipping.
Model Alternatives
Our Opinion
The Kohler Wellworth combines a powerful flush with the water savings of a dual flush option. I also love the classic look of this toilet, as it adds to the overall aesthetic of a bathroom. “Works Great and Looks Great!”
2. TOTO Drake - Most Water Efficient
- ✅ Flush Type:
- Flush Score:
- Water Consumption: 0.8/1.0
- Bowl Shape:
- Flushing System:
- Style: Two-Piece
Dimensions:
- Toilet – 27.38″ x 17.31″ x 30.06″
- – 12″
- – 2-1/2″
- – 17.6″
- Bidet feature for better sanitary benefit
- High-powered cyclonic flush system
- A discouraging ridge design
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The TOTO Drake is one of the industry's best and most popular flushing toilets. It is available in various forms: the two-piece, single flush, and the two-piece, dual-flush.
It also comes in a round bowl and elongated bowl design.
All Drake models are coated with the CEFIONTECT glaze, making it almost impossible for waste and other residues to stick to the bowl, further enhancing its hygiene quality. But, the TOTO Drake dual flush goes a step further, a possible reason for its higher price.
The dual-flush TOTO Drake models address the high water usage of the Drake toilets. Its 0.8/1.0 gallons per flush offering makes it WaterSense compliant and suitable for residents in all states.
This toilet features the Tornado flush system, which expels water from the tank through 2 powerful nozzles instead of the standard rim holes. Add that to its extra-large 2 1/8 - inch, semi-concealed, fully-glazed trapway, and it becomes clear why it is the Most efficient.
The faster the water enters the bowl, the stronger the siphoning effect in its trapway. The stronger the siphon power and the larger the trapway, the better the cleaning power and the lesser the clog and discoloration risk.
Other exciting features of this toilet include: the relatively quiet and discreet flush and the fast-filling tank - it takes just about 35 seconds. Its large water surface reduces the incidents of streaking and skid marks and curtails the odor of turds.
Unfortunately, some customers have complained that the ridge in the bowl gives the impression of an ugly, bad stain.
So, if this Drake doesn't seem right for you, check our other TOTO Drake toilets we reviewed.
Color Options
- Cotton (01)
- Bone (03)
- Colonial White (11)
- Sedona Beige (12)
- Ebony (51) (without CEFIONTECT glaze)
Compatible Seat
- SoftClose Toilet Seat – Elongated
Product Documentation
Model Variations
Our Opinion
Customers are pleased with this splurge! For most, this is a comfortable toilet with a modern design. Users like the bidet functionality and the ability to program simple functions such as opening the lid. "This TOTO is amazing and the quality is top of the line. You can’t go wrong with a setup like this."
3. TOTO Drake Washlet+ S500 - Strongest Flush
✅ Flush Type:
- Flush Score:
- Water Consumption: 0.8/1.28
- Bowl Shape:
- Flushing System:
- Style: Two-Piece
Dimensions:
- Toilet – 27-3/8″ x 17-5/16″ x 28-7/8″
- – 12″
- – 2-1/2″
- – 16-3/8″
- Rim Height – 14-15/16″
- Self-cleaning features minimize the need for manual maintenance
- Relatively quiet but effective flush
- Automatic flush system for total hands-off experience
- Relatively more expensive
- Shallow bowl with low water level
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The Drake Washlet+ is among the best bidet innovations of the TOTO company. Although it has a lot in common with the Aquia IV, it has various unique, high-tech features.
Unlike most dual-flush toilets, the TOTO Drake + Washlet S500e uses the DynaMax tech. This technology utilizes 1.28GPF for a full flush and 0.8GPF for a partial flush. It has WaterSense certification and could be quite economical.
Now, despite having a side-positioned chrome trip lever, the S500e has an automatic flush system that you can activate once you're done with the remote control.
One exciting thing we love about this toilet is how it addresses hygiene in a high-tech and even more efficient way.
While it features the common CEFIONTECT glazing, it uses electrolyzed water in its flush system, which cleans the bowl even better than regular water. But, it doesn't wait till the action is done. Before use, this toilet has a premist function that sprays the bowl with electrolyzed water to deter waste, residues, and other materials from sticking to the bowl.
To say these are what make this toilet unique would be to undermine the TOTO Drake + Washlet S500e totally. There are many other features we can guarantee you would not see in just any toilet - a clear explanation of why S500e is one of the more expensive bidet pieces.
Color Option
- Cotton (01)
Product Documentation
Other Washlet S500 Models
Our team collected all Drake Washlet S500 model variations within this collection to help you compare the differences.
| Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
| Drake Washlet S500E | MW7763046CEGA#01 | Two-piece | 1.28 | Elongated | Tornado Flush® system. High-tech electronic bidet seat and toilet combination (1.28 GPF) | Spec Sheet |
| Drake Washlet S500E | MW7763046CSGA#01 | Two-piece | 1.6 | Elongated | Tornado Flush® system. High-tech electronic bidet seat and toilet combination (1.6 GPF) | Spec Sheet |
| Drake Washlet S500E | MW7763046CSFGA#01 | Two-piece | 1.6 | Elongated | Universal height. 12" or 10" Rough-in. (1.6 GPF) | Spec Sheet |
| Drake Washlet S500E | MW7763046CEFGA#01 | Two-piece | 1.28 | Elongated | Universal height. 12" or 10" Rough-in. (1.28 GPF) | Spec Sheet |
Our Opinion
Overall, this toilet is a perfect combination of functionality and enhanced design. It comes with many high-end features such as Dynamax Tornado Flush technology and the CEFIONTECT glaze.
When it comes to functionality, this toilet lets you choose between 0.8 and 1.28 flush, both of which utilize a 360-degree flushing system to successfully clear the whole bowl of waste. With this system, you will save approximately 3500 gallons of water per year without compromising on performance.
4. American Standard H2Option - Budget Friendly
- ✅ Flush Type:
- Flush Score:
- Water Consumption (GPF): 0.92/1.28
- Bowl Shape:
- Flushing System:
- Style: Two-Piece
Dimensions:
- Toilet – 27-3/4″ x 15″ x 30″
- – 12″
- – 2″
- – 15-3/4″
- Rim Height: 15″
- Dual-flush options allow for greater water savings
- PowerWash rim
- MaP Premium rating
- This toilet isn’t ADA compliant, so is not suitable for use in public or commercial restrooms and bathrooms
- Toilet seat sold separately
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"The new American Standard H2Option is – in my opinion – one of the best dual flush toilets. As an upgrade from the former H2Option, this toilet is more water-efficient, EPA-certified, and more consumer-centric than the last."
Flush System
The American Standard H2Option has a dual-flush system that allows the user to select how much power is needed for each flush. The push-button actuator controls the two flush valves, which regulate the release of either the full 1.28 gallons per flush or a partial 0.92 gallons per flush.
- WaterSense Certified
- Glazed trapway
- PowerWash rim
I love how this toilet doesn’t settle for less. It merges a siphon-jet (gravity) bowl with a PowerWash rim that delivers water in a quick surge to all areas, even those hard-to-reach regions. It scours the bowl, so no area is left un-rinsed.
The tank refills quickly, and its EverClean surface ensures the bowl remains spotlessly clean and free from smells that even deodorizers might find difficult to neutralize. Its 2-inch wide trapway is also fully glazed to prevent clogs and waste residues.
Unfortunately, despite its gravity flush system, some customers have complained this toilet does not clear out waste in a single flush.
Design and Style
This sleek, modern-style toilet features a round-front bowl that is ideal for smaller bathrooms and restrooms. There is less need to fumble around searching for a lever or a button with the H2Option because it has a large chrome-plated push-button actuator at the top of the tank. Other notable design features include:
- Two piece design
- Exposed trapway
- No seat included
Its EverClean surface is lovely because it contributes to the bowl’s spotlessly clean tendency and eliminates nasty bacteria that cause odors even deodorizers would have a hard time neutralizing.
Check here for a more comprehensive review of the new American Standard H2Option.
Comparison - H2Option vs. Edgemere Dual Flush
Let’s compare the H2Option with another of American Standard’s dual flush toilets, the Edgemere.
| H2Option (2889218.020) | Edgemere Dual Flush (204AA200.020) |
| Two pieces | Two pieces |
| Dual flush: 1.28 or 0.92 gallons per flush | Dual flush: 1.6 or 1.1 gallons per flush |
| Round standard height bowl | Elongated Right Height bowl |
| Ultra High Efficiency Toilet (UHET) | High Efficiency Toilet (HET) |
| Does not include seat | Does not include seat |
| Class Five® canister flush | Class Five® canister flush |
| Price range: low | Price range: low |
| MaP Premium Listed | 1,000 MaP |
Although these two dual flush toilets have many similarities, the H2Option is even more water efficient then the Edgemere, earning the Ultra High Efficiency Toilet designation. At standard height instead of Right Height, the H2Option is the shorter model, which would make it more comfortable for children or shorter adults, but may be more difficult to use for the elderly or those with mobility issues.
Color Options
- White
- Bone
- Linen
Compatible Seats
- American Standard #5259B.65C Easy Lift Seat with Slow Close Hinges
Product Documentation
Buying Options
This model of the American Standard H2Option toilet is available from several different retailers, including Amazon, Home Depot, Build.com, and Wayfair. Most of the listings do not include either the toilet seat or wax ring, although Amazon includes both as a full package, reflected in a significantly higher price. Home Depot and Build.com match each other for the lowest price and longest return period of 90 days.
Model Variations
Our Opinion
Customers are happy with this dual flush toilet, stating that it has a powerful flush that does not clog easily. Buyers like this affordable option that has a modern design and excellent water efficiency. The standard height is popular among shorter users, adding additional comfort to your bathroom experience.
5. Swiss Madison St. Tropez – Most Reviewed
✅ Flush Type:
- Water Consumption: 1.1/1.6
- Bowl Shape:
- Flushing System: Vortex™ flush
- Flush Type: Dual
- Style: One-Piece
Dimensions:
- Toilet – 27” x 15-1/8” x 31-3/16”
- – 12″
- – 16″
- Rim Height: 15-7/8″
- Less noisy flush yet very powerful system
- Easy to keep clean, thanks to its flush system
- Splashbacks during flush might occur
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The Swiss Madison St. Tropez is considered one of the best one-piece toilets of the present time because it offers the benefits of space management, aesthetic excellence, and water maximization.
The St. Tropez is factory tested, EPA certified, and WaterSense approved. It offers premium water-management quality by featuring a proportionate dual flush option of 1.6 and 1.1 gallons per flush. Thus, you do not have to worry about not being able to use the toilet in your region.
Now, this is not so relevant, but we almost got confused writing this review with its interchangeable form, “Swiss Madison Well Made Forever SM-1T254”.
So, we thought this might help. The above name refers to the St. Tropez as well.
Back to business – The St. Tropez features buttons on the top of the tank which you can use to activate its dual tornado flush system and have the waste successfully run through the smooth, skirted, large trapway.
The dual Tornado Vortex flush comprises two nozzles that expel water in a cyclonic action through the bowl and down the trapway for better cleaning action. The great part is it gets the job done relatively quietly. As a result, the Swiss Madison St. Tropez is powerful enough to clear the waste and quiet enough to remain under wraps.
The St. Tropez also has a fully glazed system that extends from its bowl to its skirted trapway to ensure residues, streaks, and dirt do not affect its shiny coat and sanitary quality.
Unfortunately, we’ve seen complaints about its flush system being quite messy – “it flushes with a splash.” So unless you close the lid, the toilet water might end on your bathroom floor. Then, a few users claim a single flush never does the trick. But, again, don’t judge a toilet by its flush system alone. Let’s talk comfort. Check this full review of the Swiss Madison toilets for more information.
Color Options
- White (SM-1T254)
- Matte Black (SM-1T254MB)
- Matte White (SM-1T254MW)
- Bisque (SM-1T254BQ)
Compatible Seats
- Swiss Madison Quick-Release Seat SM-QRS54
Product Documentation
Model Variations
Our Opinion
While some users had trouble with tricky installation, most of them are happy with the sleek, modern design of the toilet, especially at this price. This toilet has a modern look, and the includes a soft-close seat. Several users praised the expedience of Swiss Madison customer service.
6. TOTO Aquia IV – Runner Up
- ✅ Flush Type:
- Flush Score:
- Water Consumption: 0.8/1.28
- Bowl Shape:
- Flushing System:
- Style: One-Piece
Dimensions:
- Toilet – 28-1/4″ x 15-3/16″ x 28-1/8″
- – 12″
- – 2-1/2″
- – 117-5/8″
- Rim Height: 16-1/8″
- Clear instructions for ease of installation and maintenance
- Its low water level makes it difficult to maintain
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The dual-flush system is actuated by a large button on its lid that can be pressed fully to use 1.28 gallons per flush for solids flush or halfway to use 0.8 gallons per flush for fluids flush. It is, therefore, EPA WaterSense-certified and CalGreen-compliant. This means, regardless of your region, this toilet fits the standard.
It uses the DynaMax Tornado Flush with an extra-large flush valve and two powerful nozzles that allows electrolyzed water to enter the bowl faster and with more force for better bowl scouring power.
Now, you’d expect a flush as powerful as this to make a lot of noise, but it doesn’t. Consumers have attested to its flush being relatively noiseless.
However, this toilet lacks quality in some aspects: Consumers complain about the chrome button not lasting and the low water flush affecting its anti-stick and sanitary quality.
Color Options
- Cotton (01)
- Sedona Beige (12)
- Bone (03)
- Colonial White (11)
- Ebony (51) – Without CEFIONTECT
Compatible Seats
- SS124 SoftClose Seat
- SS234 Slim Elongated SoftClose Seat
Product Documentation
Model Variations
Our Opinion
Buyers love the sleek look of this one-piece toilet. Some buyers do mention that the water level is a bit too low for an effective flush, however, most customers are happy with this toilet. “Easy to clean without the molded curvatures at the base found in other models. No issues with flushing.”
7. Deer Valley Symmetry Toilet
“If you’re in the market for an affordable, comfortable, and efficient dual-flush unit, the Deer Valley Symmetry is the unit for you.”
- ✅ Flush Type:
- Flush Score:
- Water Consumption: 1.1/1.6
- Bowl Shape:
- Flushing System:
- Style: One-Piece
Dimensions:
- Toilet – 26 3/4″ x 14 3/8″ x 27 1/8″
- – 12″
- – 2-1/8″
- – 16″
- Rim Height: 15-3/8″
- 1.1/1.6 GPF flash
- MaP Score of 1,000
- Comfortable Chairlike Height
- Compact size is difficult for taller users
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Dual Flush Ability
Let’s start with the basics. This unit has the highest MaP score possible of 1,000 grams. Right off the bat, we’re impressed with the sheer power each flush uses. You can choose between 1.1 and 16 gallons per flush depending on your needs.
The Symmetry uses siphonic technology to make sure each flush packs a punch. The fully glazed flush is super quiet, even with its sheer strength. The flushing power also eliminates chance of clogs or leaks. Don’t believe us? The toilet has been 100% factory tested!
To flush the toilet, press the button on top of the toilet tank.
Design & Style
We love the Deer Valley on a purely aesthetic level as well. The angular tank with the smooth skirted trapway finish connect at a beautifully crafted oval seat. The toilet is effortlessly stylish. Whether you want a statement piece or a unit that camouflages without an issue, the Symmetry can play either part.
The toilet comes with pre-installed soft closing toilet seat (with bumper to prevent slamming), pre-installed flush valve, high-quality wax ring, floor bolts, and also installation instructions. Installation is fairly straight-foward as the supply line inlet comes in two sizes: ½” and ⅞.’
The Symmetry is a compact unit, with a seat height of 16.” The unit is not ADA-certified so keep that in mind. However, this compact size is perfect for smaller bathroom set-ups.
The toilet is only available in white.
Product Documentation
Our Opinion
With an average rating of 4.5 stars, there aren’t many complaints over this Deer Valley unit. The most positive comments talk about the toilet’s fantastic MaP score, awesome price, and comfortable set-up. One user even said they couldn’t believe they could love a toilet this much! Of course, the compact design is a double-edge sword. For some it’s the best part, and for others it’s the biggest source of complaint.
8. HOROW HWMT – 8733 Toilet
“Even with tiny size, the HOROW HWMUT 8733 is mighty in its flushing power and comfortable design.”
- ✅ Flush Type:
- Water Consumption: 1.1/1.6
- Bowl Shape:
- Flushing System:
- Style: One-Piece
Dimensions:
- Toilet – 25″ x 13-3/8″ x 28-3/8″
- – 12″
- – 16-1/2″
- Rim Height: 15-3/8″
- 1.1/1.6 GPF
- Soft-closing seat included
- Ideal for smaller bathroom set-ups
- Compact size may be difficult for some users
HOROW is one of the up and coming toilet greats!
Dual Flush Ability
This unit gives you the option of 1.1 and 1.6 gallons per flush to choose from depending on your waste size. Not only is this dual-flush design eco-friendly but it’s also cost-effective. What’s better than saving hundreds of dollars off your water bill each month?
The 8733’s siphon flush design harnesses the power of gravity to remove waste without hassle in just a matter of seconds. The 360 fully glazes flush guarantees no clogs or leaks down the road.
To flush the toilet, just press the button on top of the toilet tank.
Design & Style
The HWMT is a cool, modern unit that would look in any bathroom aesthetic. Take a look at the angular tank compared to the smooth oval seat. We love the skirted trapway because it’s easy to clean and it looks effortlessly chic!
The 8733 also has a compact design. It measures 25″ deep, 13-3/8″ wide and 28-3/8″ high. The seat height stands at 16-1/2.” While this should accommodate most users, those with mobility issues might have issues using the unit.
The HOROW comes with soft-closing toilet seat, pre-installed flush valve, high-quality wax ring, floor bolts, and instructions. Installation is fairly simple as there are two big installation access points behind the toilet. The toilet comes with a 12” rough-in.
Lastly, we have to boast about the toilet’s price. This is one of the most affordable dual-flush toilets on the market. It’s perfect for smaller set-ups that want to fit in a toilet without compromising flushing power. The HOROW is straight to the point and we adore it for it.
Product Documentation
Our Opinion
Users love the toilet because of its cool exterior, powerful flushing power, and affordable price. Positive reviews talk about the toilet’s great flushing strength in even the most compact spaces. The most common complaint (amidst the very few ones) is that the compact size is a bit small for taller users. While this may be a negative for some, the compact size is also the selling point for others.
Dual Flush Learning Guide
The working mechanism of the dual flush toilet lies on the buttons or the levers. There are two different buttons designed for two types of wastage. One is for liquid, and the other one is for solid wastage.
Likewise, the dual flush system works through two mechanisms. One is known as a dual flush valve siphon, and the other is a dual flush drop valve.
- The siphon is controlled by the toilet handle/lever. When the handle is pressed (half or full), it acts as an internal plunger. As a result, the water draws and is passed to the commode/bowl. Here gravity does the rest of the work after pressing the handle to pull the water.
- On the other hand, the mechanism of the dual flush drop valve is different from the siphon. There are two buttons on the cistern. You have options to press the small button for half flush and two buttons together to flush a full flush.
When the half flush button is pressed, the cistern allows half of the water and then stops more water from flowing by the adjust overflow mechanism.
Typically, pressing one button releases a half flush and pressing the other button releases a full flush. Pressing both together is not a standard operation.
Introduced to the Market
Dual flush toilets were designed mainly to save water. Since you only need to use 50% of the canister for a liquid flush, using a these toilets leads to significant water savings over time. And while they may seem like new technology, they were actually patented a long time ago.
The first system was developed by TOTO in 1960 and initially had two levers. It also came with a hand-washer, and the water from the hand-washer was reused for flushing.
However, the first practical implementation of a dual flush toilet was designed in 1980, with future iterations working to further decrease the water needed without compromising on flush performance.
EPA Rating
Overall, toilet companies are required to keep the flush capacity of their toilets below 1.6 gallons. Many manufacturers try to go below this requirement, with some toilets that are designed to only consume 1.28 gallons per flush. Toilets that are proven to flush effectively with 80% or less of the 1.6-gallon requirement qualify for EPA WaterSense certification.
This certification ensures you save on your overall water consumption each month and can even include rebates on your water bill, depending on location. When considering a dual-flush toilet, look for EPA WaterSense certification if reducing water consumption is an important factor for you.
Advantages of Dual Flush Toilets
One of the main advantages of best dual flush toilets are they save money over time. It might not seem like a big difference, but imagine only needing half the resources for each flush to remove liquid waste.
According to the American Water Association, an average person’s annual water expenses will reduce by about $250 by using a dual flush toilet. While toilets overall are built to consume less water with each use, they use the least amount of water when compared to any other type of toilet.
Another advantage is that they are very environmentally friendly. According to the EPA, around 4,000 gallons of water can be saved each year in a standard household if a dual flush toilet is installed instead of a standard one.
Finally, another benefit that we should mention is that dual-flush toilets use gravity to force waste down a large trapway. Thanks to this design, you should experience minimal clogging with these toilets, meaning overall performance isn’t compromised even while you save on water.
Amount of Water Used
Both theoretically and practically, dual flush toilets save a lot of water daily around the world. In terms of modern dual flush toileting, it is designed for 6 liters for a full flush and 3 liters for a half flush.
But initially, when it was first developed in 1980, the full flush used to draw 11 liters, and a half flush 5.5 liters.
|
Dual Flush Toilet Water Usage |
|
| From 1980 to 1993 | 11 liters for a full flush, |
| 5.5 liters for a half flush | |
| Since 1994 till now | 6 liters for a full flush, |
| 3 liters for a half flush | |
Dual vs. Single Flush Comparisons
The primary difference between single-flush and dual-flush toilets is seen in their name. Simply put, the single-flush toilet uses a single-flush mechanism that empties the cistern entirely with a single press.
On the other hand, dual flush, you know, uses a dual flushing mechanism for liquid and solid wastage flushing differently.
Here is a table comparing the differences between single and dual-flush toilets.
Situations when Dual Flushing is Needed
The earth is full of water, but the irony is only 0.3% of water is usable for us. So, when you ask why you would want one dual-flush toilet, there are many reasons. However, it has both advantages and disadvantages as well.
Advantages
The primary objective of dual-flush toilets is to save water. And dual flush toilets allow you to use the necessary amount of water for both solid and liquid wastage separately.
Aside from this, there are several advantages of using dual flush toilets. They are as follows.
- Dual flash toilets save water, so it’s eco-friendly
- Though the expense of the dual flush toilet is costly, it will last longer. In this sense, it actually saves your money
- Generally, dual flush toilets don’t clog so quickly
- They are aesthetic to look
With the above-mentioned attributes, you may choose dual flush toilets based on your needs.
Disadvantages
Along with many advantages, you might face the following drawbacks of dual flush toilets too.
- The costly expense seems not to fit many people
- The maintenance is a little harder, and harder to clean as well
- Generally, you need professionals to install dual flush toilets or even fix the toilet chain
Dual Flush Lever vs. Button Options
We have already discussed the lever and buttons of dual flush toilets in the “How Does It Work” section. By the way, here is a glance at the comparison between the dual flush lever and button options to understand their differences.
Dual Flush Lever
The lever option is used in the dual flush siphon. You have to operate the dual flush siphon valve through the lever. The lever (handle) is set to handle-down in two settings. Half-down for a half-flush, and full-down for a full-flush. The lever backs to its place automatically after pressing down.
Dual Flush Button
The button option is the traditional and most common type of dual flush toilet. Two buttons are set on the cistern. One is singly for the half-flush (the smaller one). For a full flush, you have to press two buttons together.
Bottom Line
It can be rather difficult to find the best dual flush toilet online without some knowledge. Therefore, we hope our toilet buying guide and overall recommendations help out before you make your purchase! Ultimately, the TOTO Aquia IV is our top pick if you want the benefit of the luxury features it has to offer. Alternatively, consider one of the other models from our list if you’re looking for a more affordable option.