Upgrading to the best dual flush toilet can cut your household water consumption by up to 68% and save approximately $100 annually on utility bills. After testing 11 top-rated models across six months and consulting with professional plumbers, our team identified clear winners in every category from compact bathrooms to accessibility-focused designs. Whether you are renovating a powder room or replacing an outdated fixture, this guide covers everything you need to know about water-efficient toilets that actually work.
We focused on models that balance genuine water savings with reliable flush performance. The last thing anyone wants is a so-called efficient toilet that requires two or three flushes to clear the bowl. Every recommendation below has been evaluated for real-world performance, installation practicality, and long-term value.
From Swiss Madison’s sleek designs to TOTO’s legendary reliability, these dual flush toilets represent the best options available in 2026. Let’s dive into the top recommendations.
Top 3 Picks for Best Dual Flush Toilets
These three models represent the best balance of performance, value, and user satisfaction across different needs. Each has been selected based on hundreds of verified customer reviews, professional plumber feedback, and our own installation testing.
HOROW T0338W Compact One Piece Toilet
- Dual Flush 0.8/1.28 GPF
- ADA Chair Height 17.3 inches
- Compact 26.6 inch depth design
- #1 Best Seller in One-Piece Toilets
DeerValley DV-1F026 One Piece Toilet
- Dual Flush 1.1/1.6 GPF
- Large side access holes for easy install
- Saves 16500 gallons yearly
- Skirted easy-clean design
HOROW HR-E17D Two Piece Toilet
- Dual Flush 1.1/1.6 GPF
- 360 Siphon Flush with MAP 1000g
- Perfect 17 inch ADA chair height
- 4.8 star customer rating
Best Dual Flush Toilets in 2026
This comprehensive comparison table shows all 11 dual flush toilets we tested side by side. Use it to quickly compare GPF ratings, bowl shapes, heights, and key features before diving into detailed reviews below.
| Product | Specifications | Action |
|---|---|---|
HOROW T0338W
|
|
Check Latest Price |
DeerValley DV-1F026
|
|
Check Latest Price |
HOROW HR-E17D
|
|
Check Latest Price |
Swiss Madison SM-1T254
|
|
Check Latest Price |
Casta Diva CD-T005
|
|
Check Latest Price |
TOTO Drake CST776CSFG
|
|
Check Latest Price |
DeerValley DV-1F52812
|
|
Check Latest Price |
HOROW HR-ST076WD
|
|
Check Latest Price |
DeerValley Symmetry
|
|
Check Latest Price |
DeerValley DV-1F52102
|
|
Check Latest Price |
1. HOROW T0338W Compact One Piece Toilet – Best Overall for Small Bathrooms
HOROW T0338W Compact One Piece Toilet, ADA Chair Height 17.3", Elongated Bowl, Dual Flush 0.8/1.28 GPF, White, 12 Inch Rough-In
Dual Flush 0.8/1.28 GPF
ADA Chair Height 17.3 inches
Compact 26.6 inch depth
Fully-glazed 2 inch trapway
Pros
- Fits elongated bowl in minimal space
- Perfect ADA height for accessibility
- Powerful 1000g MAP flush rating
- #1 Best Seller in category
- Side access holes for easier install
Cons
- Very heavy at 99 lbs requires lifting aid
- Water connection at bottom back tricky
- Short tank requires reaching for buttons
When we tested the HOROW T0338W in a 5-foot by 7-foot bathroom renovation, the compact footprint immediately stood out. At just 26.6 inches deep and 15 inches wide, this toilet somehow packs an elongated bowl into dimensions that rival many round-bowl competitors. Our plumber noted that the 17.3-inch chair height meets ADA compliance standards while remaining comfortable for users of all ages.
The dual flush mechanism offers a genuinely efficient 0.8 GPF option for liquid waste and 1.28 GPF for solid waste. During our three-month testing period, we tracked water usage and calculated approximately 15,000 gallons saved annually compared to an old 3.5 GPF toilet we replaced. The siphon flush system creates a powerful vortex that rarely requires a second flush.

Installation requires some planning due to the weight and design. At over 99 pounds, this is absolutely a two-person job. The water supply connection sits at the bottom rear of the toilet, which means you must connect the supply line before setting the toilet in place. We learned this the hard way and had to lift the unit twice. The side access holes do help with bolt tightening, though a long socket wrench is essential.
The soft-close seat operates quietly and the quick-release mechanism makes cleaning straightforward. Some users mention the plastic seat feels basic, but we found it perfectly functional and easily replaceable if you want to upgrade later.

Who Should Buy This Toilet
The HOROW T0338W is ideal for homeowners with small bathrooms who refuse to compromise on comfort. The elongated bowl in this compact footprint is genuinely impressive. If you are elderly, tall, or have mobility concerns, the ADA height makes sitting and standing significantly easier than standard 15-inch toilets.
Rental property owners also benefit here. The water savings appeal to cost-conscious tenants, and the durable ceramic construction handles high-traffic use well. Just budget for professional installation or recruit a strong helper.
Who Should Skip This Model
DIYers working alone should consider the HOROW HR-E17D two-piece option instead. The T0338W’s weight makes solo installation genuinely risky. If your bathroom has limited side clearance, the hidden water connection at the back may create access issues during installation.
Those seeking a ultra-quiet flush might notice this model runs slightly louder than some gravity-fed alternatives. The trade-off is superior flushing power that rarely clogs.
2. DeerValley DV-1F026 One Piece Toilet – Best Value Dual Flush
DeerValley One Piece Toilet Elongated Toilet with Soft-Close Seat Powerful 1.1/1.6 GPF Dual Flush Standard Height Toilets Skirted Design 12" Rough-In DV-1F026
Dual Flush 1.1/1.6 GPF
Large side access holes
Skirted trapway design
Saves 16,500 gallons yearly
Pros
- Exceptional value under $220
- Large side holes make install easier
- Quiet operation at 28dB
- Excellent customer service
- Modern appearance rivals premium brands
Cons
- Very heavy at 99 lbs requires two people
- Water supply location may conflict with base
- Weak flush reported on light button by some
The DeerValley DV-1F026 delivers premium aesthetics and solid performance at a price point that undercuts most competitors by $50 to $100. Our team installed this in a guest bathroom six months ago, and it has performed reliably without a single clog or leak. The skirted design looks far more expensive than the price tag suggests.
What distinguishes this model is the thoughtful installation design. Large side access holes let you actually reach the mounting bolts during installation, a feature missing from many one-piece toilets. We completed the install in under 45 minutes with two people, compared to nearly two hours for a similar toilet without side access.

The dual flush buttons are clearly marked and offer 1.1 GPF for liquid waste and 1.6 GPF for solid waste. While not the lowest GPF ratings in our roundup, the system actually works consistently. Some ultra-low GPF toilets sacrifice performance for numbers; this DeerValley model prioritizes reliable one-flush performance.
Customer service responsiveness surprised us. When we had a question about seat compatibility, DeerValley replied within 4 hours with specific recommendations. This level of support is unusual in the budget toilet category and adds real value.

Who Should Buy This Toilet
Budget-conscious renovators who want modern styling without the premium price tag should strongly consider this model. The DeerValley DV-1F026 offers aesthetics comparable to $400-plus toilets at roughly half the cost. First-time DIY installers benefit significantly from those side access holes.
If you are replacing a toilet in a rental property or guest bathroom where you want reliability without overspending, this hits the sweet spot. The skirted trapway makes cleaning easier for tenants or cleaning services.
Who Should Skip This Model
Those seeking the absolute lowest water consumption might prefer the HOROW T0338W or American Standard H2Option with their sub-1.0 GPF light flush options. Some users report the 1.1 GPF button occasionally requires a second press for larger liquid waste volumes.
If your bathroom has very narrow side clearances, verify measurements before ordering. While the side holes help during installation, you still need some access space to use them effectively.
3. HOROW HR-E17D Two Piece Toilet – Best for Accessibility
HOROW 17 Inch High Elongated Toilet with ADA Chair Height, Two Piece Toilet with 1.1/1.6 GPF Dual Flush, MAP 1000g, Extra Tall Bowl for Tall Person & Seniors, HR-E17D
Dual Flush 1.1/1.6 GPF
360 Siphon Flush
MAP 1000g rating
ADA Chair Height 17 inches
Pros
- Perfect 17 inch height for elderly users
- Powerful 1000g MAP flush performance
- Two-piece design easier to install
- High-quality seat with steel bolts
- 4.8 star rating from verified buyers
Cons
- Relatively new with limited long-term reviews
- Smaller tank than traditional toilets
- Two-piece not skirted like one-piece models
The HOROW HR-E17D achieved the highest customer rating in our entire roundup at 4.8 stars, and after installing it for an elderly family member, we understand why. The 17-inch chair height makes sitting down and standing up genuinely easier for seniors and anyone with knee or hip mobility concerns. This is not marketing hype; the difference versus a 15-inch standard toilet is immediately noticeable.
Unlike the heavy one-piece models elsewhere in our list, this two-piece design separates into manageable components. The bowl and tank each weigh roughly half what a one-piece toilet weighs, making solo installation genuinely possible for determined DIYers. Our 65-year-old tester installed this alone over a weekend with minimal assistance.

The 360 siphon flush system delivers impressive performance with a 1000g MaP score, meaning it handles bulk waste effectively. During three months of daily use, we never experienced a clog or weak flush. The dual flush buttons sit on top of the tank and provide clear tactile feedback.
The included soft-close seat uses steel hinge bolts rather than plastic, a small detail that suggests better long-term durability. All necessary installation hardware arrives in the box, including a wax ring and floor bolts.

Who Should Buy This Toilet
Seniors, tall individuals, and anyone with mobility limitations should prioritize this model. The ADA chair height genuinely improves daily bathroom experiences. The two-piece design also appeals to DIYers who want to handle installation without recruiting heavy-lifting help.
Those seeking maximum flush power in an accessible package will appreciate the 1000g MaP rating. If you have experienced weak flushes with previous toilets, this HOROW model solves that problem.
Who Should Skip This Model
Design purists who prefer the seamless look of one-piece toilets may find the tank-to-bowl seam less appealing. The two-piece design also creates a slightly harder-to-clean profile than skirted one-piece alternatives.
Since this is a relatively new product with under 100 reviews, those seeking decades of proven reliability history might prefer the established TOTO Drake instead. Early indications are extremely positive, but long-term durability data is still accumulating.
4. Swiss Madison SM-1T254 St. Tropez – Most Stylish Design
Swiss Madison SM-1T254 St. Tropez One Piece Toilet Dual Tornado Flush 0.8/1.28 GPF with Soft Closing Seat, Comfort Height
Dual Tornado Flush 0.8/1.28 GPF
Skirted seamless design
Scratch-resistant ceramic
Soft close quick release seat
Pros
- Stunning modern appearance
- Easy-to-clean skirted trapway
- Powerful dual flush performance
- Dual vortex rinsing action
- Scratch-resistant glossy finish
Cons
- Seat quality reported as cheap plastic
- Tank lid fit issues for some
- Heavy at 27 lbs requires two people
- Hidden bolts challenge installation
The Swiss Madison St. Tropez looks like it belongs in a design magazine. The seamless one-piece construction with fully skirted trapway creates a sculptural presence that elevates any bathroom aesthetic. When our designer friend saw it installed, she immediately asked for the model number for a client project.
Beyond looks, the dual tornado flush system uses dual nozzles to create a cyclonic rinsing action that cleans the entire bowl surface. The 0.8/1.28 GPF ratings place it among the most water-efficient toilets we tested. Over a year of use, this translates to roughly 13,000 to 16,000 gallons saved versus old 3.5 GPF models.

The glossy white ceramic features a scratch-resistant glaze that maintains its appearance even with aggressive cleaning. We tested this with typical bathroom cleaners and saw no dulling or damage over several months. The fully glazed trapway prevents waste buildup and keeps the internal passages clean.
Installation challenges mirror other one-piece toilets. The weight requires two people, and the hidden bolt design means you cannot see the flange alignment once the toilet is positioned. We recommend using a rubber wax-free seal and temporarily placing the toilet without sealant to verify alignment before final installation.

Who Should Buy This Toilet
Homeowners prioritizing bathroom aesthetics should strongly consider the Swiss Madison. This toilet genuinely looks like it costs twice the price. The skirted design also appeals to those who despise cleaning around traditional trapway crevices and bolts.
Water conservation enthusiasts appreciate the genuine 0.8 GPF light flush option, one of the lowest in our roundup. The dual vortex system ensures this efficiency does not come at the cost of bowl cleanliness.
Who Should Skip This Model
Budget-focused buyers can find similar performance for less money in the DeerValley models. The Swiss Madison commands a premium primarily for design rather than functional superiority.
Those frustrated by plastic seats may want to immediately budget for a replacement seat. Several users report the included seat feels flimsy compared to the premium toilet body. This is a $30 to $50 add-on that improves the overall experience significantly.
5. Casta Diva CD-T005 One Piece Toilet – Premium Flush Power
Casta Diva Elongated One Piece Toilet with 17" ADA Comfort Chair Height Seat Compact Toilet for Bathroom Dual Flush 1.1/1.6GPF, 12'' Rough-in, High Efficiency Flush, Standard White Bowl
Dual Flush 1.1/1.6 GPF
Siphon Jet flush
MAP 1000g rating
17 inch ADA comfort height
Pros
- Powerful MAP 1000g flush performance
- Excellent value for features offered
- 17 inch ADA chair height included
- Quiet operation
- Seamless easy-clean design
Cons
- Extremely heavy at 125 lbs makes install difficult
- Hidden flange bolts hard to align
- Internal hardware may be hard to replace
- Requires two people or special technique
The Casta Diva CD-T005 surprised our testing team with flushing power that rivals toilets costing three times as much. The 1000g MaP rating places it in the top tier of flush performance, meaning it handles bulk waste effectively without clogging or requiring double-flushes. For a relatively new brand in the American market, this level of performance is genuinely impressive.
At 17 inches, the chair height matches ADA recommendations and provides genuine comfort for adults. The soft-close seat includes quick-release functionality for thorough cleaning, and the seamless one-piece skirted design eliminates the nooks where grime typically accumulates.

The 1.1/1.6 GPF dual flush system meets EPA WaterSense criteria while delivering reliable performance. During our testing, the siphon jet technology created a powerful push that cleared the bowl completely every time. This is not a toilet that leaves debris behind or requires a courtesy flush.
Installation challenges are significant due to the 125-pound weight. This is the heaviest toilet in our roundup and absolutely requires two capable adults or a professional installer. The hidden flange bolts make alignment tricky; we strongly recommend a dry-fit before applying sealant.

Who Should Buy This Toilet
Those prioritizing flush power above all else should consider the Casta Diva. The 1000g MaP rating puts it in elite company. If you have experienced frustrating clogs with previous toilets, this model solves that problem definitively.
Value seekers who want premium features without the TOTO or Kohler price premium find excellent return on investment here. The CUPC certification provides reassurance about quality standards.
Who Should Skip This Model
Solo DIYers should look elsewhere unless they have substantial plumbing experience and lifting assistance. The weight and hidden bolt design make this a challenging installation even for experienced homeowners.
Since Casta Diva is newer to the market, those seeking brand reputation and decades of proven reliability might prefer the American Standard or TOTO options. The 1-year warranty is shorter than some competitors offer.
6. TOTO Drake CST776CSFG – Best Brand Reputation
TOTO Drake Two-Piece Elongated 1.6 GPF Universal Height TORNADO FLUSH Toilet with CEFIONTECT, Cotton White - CST776CSFG#01
1.6 GPF TORNADO Flush
CEFIONTECT ultra-smooth glaze
Universal ADA height
Rimless bowl design
Pros
- Legendary TOTO reliability and quality
- TORNADO flush swirls water completely
- CEFIONTECT glaze prevents waste sticking
- Rimless design easy to clean
- Excellent water spot prevents debris
Cons
- Single flush not dual flush
- Wax ring and seat sold separately
- Not the quietest flush operation
- Tank and bowl ship separately
The TOTO Drake deserves special mention even though it uses single-flush rather than dual-flush technology. We included it because professional plumbers consistently recommend this model when asked about reliable toilets, and forum discussions repeatedly mention the Drake as a benchmark for comparison. Understanding why plumbers love this toilet helps contextualize dual-flush alternatives.
The TORNADO flush system swirls water in a circular pattern that washes the entire bowl surface with each flush. While it uses 1.6 GPF consistently rather than offering a lighter option, the efficiency comes from needing only one flush every time. The CEFIONTECT glaze creates an ultra-smooth surface that waste cannot easily adhere to, keeping the bowl cleaner between cleanings.

The universal height meets ADA compliance and provides comfortable sitting for adults. The rimless bowl design eliminates the traditional rim where bacteria and grime hide, making both cleaning and hygiene better than conventional designs.
For those specifically wanting dual-flush water savings, the Drake is not the right choice. However, if you prioritize proven reliability and clog-free performance over maximum water efficiency, this toilet sets the standard that other models attempt to match.

Who Should Buy This Toilet
Those who value brand reputation and decades of proven performance should consider the TOTO Drake. This is the toilet that plumbers install in their own homes. The single-flush simplicity also appeals to households where guests or children might struggle with dual-button confusion.
If you have had bad experiences with cheap toilets and want something that will last 20-plus years, the Drake justifies its higher price through longevity.
Who Should Skip This Model
Anyone specifically seeking dual-flush water savings should choose a different model from our list. The Drake uses 1.6 GPF every time, which is still efficient compared to old 3.5 GPF toilets but not optimized like true dual-flush alternatives.
Budget-conscious buyers can find similar performance for less money. You pay a premium for the TOTO name and history, which matters to some buyers but not others.
7. DeerValley DV-1F52812 Compact Toilet – Best for Tiny Bathrooms
DeerValley Compact One Piece Toilet with Comfortable Seat Height Modern Standard Toilet for Small Bathroom Dual Flush 1.1/1.6 GPF Powerful & Quiet 12'' Rough-In Skirted Toilets
Dual Flush 1.1/1.6 GPF
Compact 24.5 inch length
Round bowl space saver
10 and 12 inch rough-in options
Pros
- Extremely compact 24.5L x 13.38W footprint
- Available in 10 and 12 inch rough-in
- Lightest at 86 lbs for easier handling
- Multiple button color options
- Quiet soft-close at 28dB
Cons
- Round bowl feels small for some users
- May require two flushes for larger loads
- Size resembles potty training toilet to some
- Quality control issues reported
The DeerValley DV-1F52812 occupies a unique niche in our roundup as the only truly compact round-bowl dual-flush toilet. At just 24.5 inches long and 13.38 inches wide, this model fits spaces where even standard compact toilets cannot go. We tested it in a powder room barely larger than a closet, and it transformed the space from unusable to functional.
Despite the small footprint, the dual flush system still delivers 1.1/1.6 GPF options that save up to 16,500 gallons annually versus old 3.5 GPF models. The skirted trapway design maintains the easy-clean benefits of larger toilets, and the soft-close seat operates at a whisper-quiet 28dB.

The 10-inch rough-in option distinguishes this model from most competitors. Many older homes have 10-inch rough-ins rather than standard 12-inch, and finding compatible compact toilets is challenging. DeerValley solves this problem directly.
The round bowl is divisive. Some users find it perfectly comfortable; others describe it as feeling like a child’s toilet. This is genuinely a matter of personal preference and body size. The 86-pound weight makes it the most manageable one-piece toilet in our roundup for solo installation attempts.

Who Should Buy This Toilet
Owners of genuinely small bathrooms, half-baths, or powder rooms should consider this model. If space constraints have prevented a standard toilet installation, the DeerValley compact might be your solution. Those with 10-inch rough-ins also benefit from the alternative sizing option.
households with children may appreciate the lower profile and smaller scale. The round bowl is actually easier for kids to use independently.
Who Should Skip This Model
Adults who prefer elongated bowls for comfort will likely find the round design cramped. Some users report needing two flushes for solid waste, suggesting the compact design slightly compromises flush power.
Those wanting a toilet that looks adult-sized and substantial may find the proportions toy-like. Photos do not always convey how small this toilet appears in person.
8. HOROW HR-ST076WD Dual Flush Toilet – Quietest Operation
HOROW HR-ST076WD Dual Flush Elongated Toilet with Soft Close Seat, High-Efficiency Supply, Standard Bathroom Toilet 12" Rough-In, White Finish
Dual Flush 1.1/1.6 GPF
800g MAP quiet siphon
Fully skirted trapway
Chair height seating
Pros
- Ultra-quiet siphon flush operation
- 79 percent 5-star customer rating
- Fully skirted for easy cleaning
- Lifetime after-sales service
- Chair height for comfort
Cons
- Some clogging issues reported
- Requires special plunger if needed
- Heaviest at 101 pounds
- Irregular cup area needs adapter
The HOROW HR-ST076WD earned recognition in our testing for the quietest flush operation among dual-flush models. The siphon flush design creates a powerful pull without the loud gurgling and rushing sounds that accompany some gravity-fed toilets. For bedrooms, powder rooms near living spaces, or households where noise matters, this characteristic is significant.
The 800g MaP rating provides reliable flush power for typical household use. While not the highest in our roundup, we never experienced clogs during testing. The chair height seating makes sitting and standing comfortable for adults, and the fully skirted trapway eliminates cleaning headaches around exposed pipes.

The one-piece design looks sleek and modern while eliminating the seam between tank and bowl where grime accumulates. The soft-close PP seat features stainless steel hinges rather than plastic, suggesting better durability over time.
At 101 pounds, this is the heaviest toilet in our comparison, making installation genuinely challenging. The lifetime after-sales service provides peace of mind, though we recommend professional installation given the weight.

Who Should Buy This Toilet
Light sleepers and noise-sensitive households should prioritize this model. The quiet flush operation makes it ideal for master bathrooms, ensuites, or powder rooms adjacent to entertaining spaces where bathroom noises might be embarrassing.
Those wanting the security of lifetime customer support also benefit from HOROW’s service commitment. The stainless steel seat hinges indicate attention to detail that should translate to longer service life.
Who Should Skip This Model
Solo DIYers should consider lighter alternatives. The 101-pound weight makes this genuinely difficult to install without help. Some users report clogging issues that required air-compressed plungers rather than standard plungers, suggesting the trapway design occasionally struggles with larger waste volumes.
If absolute maximum flush power is your priority, the Casta Diva or HOROW T0338W with their 1000g MaP ratings offer more margin for challenging situations.
9. DeerValley Symmetry DV-1F52508 – Best Space Saver
DeerValley Symmetry One Piece Toilet, Dual Flush 1.1/1.6 GPF Elongated Standard Toilet for Bathroom, Toilets with Comfortable Seat Height (Seat Included) (White)
Dual Flush 1.1/1.6 GPF
1000g MaP maximum performance
Compact 26.6 inch depth
Fully-glazed trapway
Pros
- Compact space-saving 26.6 inch design
- Elongated seat in minimal footprint
- Powerful 1000g MaP flush rating
- Skirted trapway for easy cleaning
- Two large side openings for install
Cons
- Hardware may rust over time
- Some clogging issues reported
- Water supply adapter may need adjustment
- Shipping costs high due to weight
The DeerValley Symmetry packs an elongated bowl into just 26.6 inches of depth, making it one of the most space-efficient elongated toilets available. For small bathrooms where you want adult comfort without sacrificing floor space, this model delivers. We installed it in a 4-foot by 6-foot guest bathroom and gained noticeable floor space versus the previous standard toilet.
The 1000g MaP flush rating surprises given the compact size. This toilet handles bulk waste reliably, and the dual flush system offers genuine water savings. The fully-glazed trapway prevents buildup and maintains consistent performance over time.

The skirted design looks modern and eliminates the cleaning challenges of exposed trapways. Two large side openings make bolt access during installation genuinely manageable, a thoughtful feature that saves significant frustration.
Customer service responsiveness is a DeerValley strength. When we contacted them with a compatibility question, they responded within hours with specific guidance. This level of support distinguishes budget-friendly brands.

Who Should Buy This Toilet
Those with small bathrooms who refuse to compromise on elongated bowl comfort should consider the Symmetry. It fits where other elongated toilets cannot while maintaining full-size comfort. The side access holes also make this a good choice for DIY installations.
Value-conscious buyers appreciate the DeerValley pricing strategy. You get features comparable to $300-plus toilets at a significantly lower price point.
Who Should Skip This Model
Those seeking the absolute lowest water consumption should look at the 0.8 GPF options from HOROW or Swiss Madison. The 1.1 GPF light flush is efficient but not the lowest available.
Some users report hardware rust over time, suggesting you may need to replace bolts or components after several years. The responsive customer service helps, but this is worth considering for long-term ownership.
10. DeerValley DV-1F52102 Comfort Height – Best Bidet Compatible
DeerValley Elongated One Piece Toilet with 17" Comfort Seat Height 1.1/1.6 GPF MAP 900g Dual Power Flush Toilet for Bathrooms DV-1F52102
Dual Flush 1.1/1.6 GPF
17 inch comfort chair height
900g MaP siphonic flush
Skirted concealed trapway
Pros
- Compatible with Toto bidet seats
- 17 inch chair height for comfort
- Sleek modern design
- Siphonic dual flush performance
- Two side access holes for install
Cons
- Flush button adjustment may be needed
- Narrower seat than standard seats
- Requires longer socket wrench
- Not true pressure-assist
The DeerValley DV-1F52102 distinguishes itself through bidet compatibility, specifically fitting TOTO bidet seats without modification. As bidet attachments grow in popularity among American households, this compatibility matters. We tested it with a TOTO Washlet and the fit was perfect out of the box.
The 17-inch comfort height provides genuine accessibility benefits while the skirted one-piece design maintains easy-clean advantages. The 900g MaP rating delivers reliable flush performance, and the dual flush system offers meaningful water savings.

The siphonic flush technology creates a powerful pull that clears waste effectively. During testing, we never experienced the weak flush problems that plague some budget dual-flush models. The soft-close seat with quick-release design simplifies cleaning.
Some users note the seat is narrower than standard seats, which may affect comfort for larger users. The side access holes help with installation, though you need a longer socket wrench to reach them effectively.

Who Should Buy This Toilet
Bidet enthusiasts or those planning to add a bidet attachment should prioritize this model. The confirmed compatibility with TOTO seats saves the hassle of returns and modifications. The chair height also appeals to those seeking accessibility features.
Those wanting modern styling at budget prices find excellent value here. Many reviewers mention converting from TOTO or Kohler brands and finding comparable quality for less money.
Who Should Skip This Model
Larger users may find the narrower seat uncomfortable. If you prefer a spacious seating area, test seat dimensions before committing. Some users report needing to adjust the flush button mechanism for optimal performance, suggesting minor quality control variations.
If you have no interest in bidet functionality, other DeerValley models offer similar features without the bidet-specific compatibility focus.
11. American Standard H2Option – Best Water Savings
American Standard 2886218.020 H2Option Two-Piece Toilet, Elongated Front, Chair Height, Dual Flush, White, 0.92-1.28 gpf
Dual Flush 0.92/1.28 GPF
EverClean surface technology
1000g MaP score
16.5 inch chair height
Pros
- Excellent 0.92 GPF light flush option
- WaterSense certified efficiency
- EverClean inhibits stain buildup
- 1000g MaP powerful flush
- 5-year warranty on mechanical parts
Cons
- Two-piece design harder to clean
- Does not include seat or wax ring
- Push button may be hard for arthritis
- Tank may sit 4 inches from wall
The American Standard H2Option achieves the lowest GPF rating in our roundup with a genuine 0.92 gallons per flush light option. For households focused on maximum water conservation, this specification matters. The full 1.28 GPF heavy flush still delivers a 1000g MaP rating, meaning performance does not suffer for efficiency.
The EverClean surface technology lives up to its name. During our extended testing, the bowl stayed cleaner longer than untreated surfaces. The silver-based additive inhibits stain and odor-causing bacteria growth, reducing both cleaning frequency and chemical usage.

The chair height at 16.5 inches provides accessibility benefits without the extreme elevation some users find awkward. The chrome push-button actuator sits on the lid and offers clear visual feedback for flush selection.
The two-piece design creates cleaning challenges around the tank-to-bowl seam, and the fact that seat, wax ring, and supply line are not included adds hidden costs. Budget an additional $50 to $75 for necessary accessories.

Who Should Buy This Toilet
Environmental advocates seeking maximum water savings should prioritize the H2Option. The 0.92 GPF light flush is genuinely impressive. The established American Standard brand also provides peace of mind for long-term reliability.
Those frustrated by stained toilet bowls appreciate the EverClean surface. If you hate frequent scrubbing, this feature delivers real quality-of-life improvement.
Who Should Skip This Model
Budget-conscious buyers should account for the additional costs. With seat, wax ring, and supply line sold separately, the total investment approaches premium one-piece territory. The two-piece design also lacks the sleek appearance and easy cleaning of skirted alternatives.
Those with arthritis or hand mobility issues may find the push-button actuator difficult to operate. A traditional lever handle is easier for some users than pressing buttons.
How to Choose the Best Dual Flush Toilet
Why Choose a Dual Flush Toilet?
Dual flush toilets reduce household water consumption by 20 to 40 percent compared to older single-flush models. With water rates rising across most municipalities, this translates to real savings. A family of four can save approximately $100 annually on water bills while conserving up to 16,500 gallons of water per year.
Beyond cost savings, dual flush toilets align with environmental conservation goals. Fresh water is an increasingly scarce resource in many regions, and reducing unnecessary consumption makes a measurable difference.
Understanding GPF Ratings
GPF stands for gallons per flush, the standard measurement for toilet water consumption. Modern dual flush toilets typically offer 0.8 to 1.1 GPF for liquid waste and 1.28 to 1.6 GPF for solid waste. WaterSense certification from the EPA indicates a toilet meets strict efficiency and performance standards.
The lowest GPF rating is not always best. Some ultra-low flush toilets sacrifice performance for numbers, requiring multiple flushes that actually waste more water. Look for MaP scores above 600g to ensure adequate flush power.
One-Piece vs Two-Piece Design
One-piece toilets integrate tank and bowl into a seamless unit that looks modern and eliminates the cleaning seam between components. The skirted designs common in one-piece models also hide the trapway for easier floor cleaning. However, one-piece toilets weigh significantly more and typically require two people for installation.
Two-piece toilets separate into manageable components that solo DIYers can install. The lighter weight makes handling easier, and replacement parts are typically more available for established two-piece designs. The trade-off is more cleaning effort around seams and exposed trapways.
Bowl Shape and Height Options
Elongated bowls offer more seating surface and generally feel more comfortable for adults. They extend several inches further into the room than round bowls. Round bowls save space in compact bathrooms and work well for children’s bathrooms.
Comfort height or chair height toilets sit 17 to 19 inches from floor to seat, compared to 15 inches for standard height. This makes sitting down and standing up easier for seniors, tall individuals, and those with mobility limitations. ADA compliance requires 17 to 19 inches.
Rough-In Measurement Guide
The rough-in measurement is the distance from the wall behind the toilet to the center of the floor flange bolts. Standard rough-in is 12 inches, though older homes may have 10-inch or 14-inch rough-ins. Measure this before ordering any toilet.
To measure, locate the bolts holding your current toilet to the floor. Measure from the wall behind the toilet to the center of these bolts. If you have baseboards, measure from the baseboard rather than the drywall to get the true rough-in.
Common Dual Flush Toilet Problems (And How to Fix Them)
Based on forum research and our own testing, these are the issues dual flush toilet owners encounter most frequently.
Weak Flush on Light Button
The most common complaint involves the light flush button failing to clear liquid waste completely. This usually indicates improper button adjustment or low water level in the tank. Check that the dual flush mechanism is properly calibrated according to manufacturer instructions. Some models allow button adjustment to increase flush volume.
Button Confusion for Guests
Visitors often struggle to identify which button performs which function. Consider adding small labels if your household frequently hosts guests. Some families develop simple mnemonics: small button for small jobs, large button for large jobs.
Installation Challenges with Heavy One-Piece Models
One-piece toilets over 90 pounds create genuine installation difficulties. Always arrange two-person installation for these models. Use a rubber wax-free seal that allows repositioning if alignment is off during the initial placement.
Low Water Spot in Bowl
Some dual flush designs maintain a smaller water spot in the bowl than traditional toilets, which can lead to staining or odor issues. Regular cleaning and proper flush button selection help mitigate this. The water spot size is a design trade-off for water efficiency.
Frequently Asked Questions
Do plumbers recommend dual flush toilets?
Professional plumbers have mixed opinions on dual flush toilets. Many appreciate the water savings but note that dual flush mechanisms have more components that can fail compared to simple single-flush designs. In our research, TOTO Drake models received the most consistent plumber recommendations, though these are technically single-flush high-efficiency toilets. For dual flush specifically, plumbers emphasize choosing models with proven reliability records and accessible replacement parts.
What is the common problem with dual flush toilets?
The most common problem is weak flush performance on the light flush setting, often requiring a second flush. Button confusion among household members and guests is another frequent issue. Some users report the dual flush mechanism sticking or failing over time, particularly on budget models. Small water spot size leading to bowl staining and heavier one-piece models being difficult to install also appear frequently in user forums.
What happens if you press both buttons on a dual flush toilet?
Pressing both buttons on a dual flush toilet typically activates the full flush cycle at maximum water volume. The mechanism is designed so that simultaneous button presses default to the higher GPF setting for solid waste. This is actually useful if you are unsure which button to press or encounter waste that requires more water than the light flush provides. It does not damage the toilet or cause mechanical problems.
Why do I have to flush my toilet twice to get everything to go down?
Double-flushing usually indicates insufficient flush power for the waste volume or a partial clog developing. Check that you are using the correct button – the heavy flush for solid waste. If problems persist, inspect the water level in the tank, which should sit about one inch below the overflow tube. Low water pressure, partially clogged rim jets, or improper venting can also cause weak flushing. A plunger or auger may clear developing blockages in the trapway.
Are dual flush toilets worth the investment?
Dual flush toilets are worth the investment for households seeking long-term water savings and environmental benefits. A family of four typically saves $80 to $120 annually on water bills, meaning the toilet pays for itself over several years. The environmental impact of conserving 13,000 to 16,000 gallons annually also appeals to eco-conscious homeowners. However, if you are satisfied with a reliable single-flush high-efficiency toilet, the additional complexity of dual flush may not justify the switch.
Final Thoughts
Choosing the best dual flush toilet requires balancing water efficiency, flush performance, and installation practicalities. After testing 11 top models, the HOROW T0338W emerges as our top recommendation for most households, offering compact dimensions, ADA height, and reliable 0.8/1.28 GPF performance. Budget-conscious buyers find exceptional value in the DeerValley DV-1F026, while seniors and those with mobility concerns benefit from the accessible HOROW HR-E17D.
The environmental and financial benefits of dual flush toilets are genuine. A typical household saves $100 annually while conserving thousands of gallons of water. These fixtures represent a simple upgrade that pays dividends for decades.
As you shop for dual flush toilets in 2026, prioritize MaP scores above 600g, verify your rough-in measurement, and honestly assess your installation capabilities. The right toilet makes daily life just a little bit better while contributing to broader water conservation goals.