Best Under 1.2 GPF Toilets in 2026: 8 Picks
The TOTO Drake II is our top pick for a toilet under 1.2 GPF, with a 1.0 GPF single flush, elongated bowl, and chair height. This list includes eight models that meet the sub-1.2 GPF spec. We chose them based on published specifications such as flush volume, bowl shape, height, and additional features. Prices are live from the listing. We have not tested these units.
8 picks from 2 toilets that match this guide with a price we can quote today, made by 26 makers. The prices below are current and each carries its read time.
Quick picks
The best fit for you
- For tall users: If you need a taller bowl, the HOROW 17-inch model offers extra tall height with an elongated design. See pick 1
- For smart bidet features: For warm water and foam dispensing, the Casta Diva smart toilet brings integrated bidet functions. See pick 2
- For a classic two-piece: The TOTO Drake II provides a reliable two-piece configuration with chair height and CEFIONTECT. See pick 4
Our 8 picks
1 Best for extra tall users
HOROW 17 Inch High Elongated Toilet with ADA Chair Height
- Pieces
- Two-piece
- Bowl shape
- Elongated
- Flush
- Single flush
- Gallons per flush
- Under 1.2 GPF
- Seat height
- Extra tall
This model is the best choice for users who want a taller bowl without giving up low water use. Its 1.0 GPF single flush is among the lowest in this list, and the elongated bowl and chair height are common preferences. It's a straightforward two-piece design that doesn't add extra features.
Pros
- Extra tall height for easier stand-up
- Elongated bowl for comfort
- 1.0 GPF single flush
- Two-piece design for easier handling
Cons
- No dual flush option
- No smart features or bidet
- Rough-in size not stated
Good fit if
- Tall users seeking chair height
- Those who prefer a simple two-piece
Skip if
- You want a smart toilet with bidet
- You need a dual-flush model
Verdict: A practical pick for tall users who want the lowest flush volume without extra frills.
2 Best smart bidet
Casta Diva Smart Toilet with Tank
- Gallons per flush
- Under 1.2 GPF
- Bidet built in or included
- Yes
$649.99 (as of 10/14/2026 22:46 PDT - Details)
This smart toilet includes a warm water bidet and foam dispenser, and its 1.06 GPF flush is below the 1.2 GPF threshold. It is the only model in this list with an integrated tank and foam dispenser.
Pros
- 1.06 GPF, under the 1.2 GPF threshold
- Warm water bidet included
- Foam dispenser reduces splashing
- Smart toilet with tank
Cons
- No bowl shape or height specified
- No piece configuration stated
Good fit if
- Those who want a bidet function without a separate seat
- Users who prefer a smart toilet with tank
Skip if
- You need a specific bowl shape like elongated
- You want a two-piece or one-piece configuration explicitly
Verdict: A feature-packed smart toilet for those who want bidet functionality in a low-flow package.
3 Best non-electric bidet
Non Electric Bidet Toilet Black
- Pieces
- One-piece
- Bowl shape
- Elongated
- Gallons per flush
- Under 1.2 GPF
- Seat height
- Chair height
- Rough-in
- 12 in
- Bidet built in or included
- Yes
This non-electric bidet toilet has a foot kick flush and self-cleaning function, in a one-piece elongated design with chair height. Its flush volume is 1.0 GPF, and the rough-in is 12 inches, which fits standard plumbing.
Pros
- Non-electric foot kick flush
- Self-cleaning function stated
- One-piece elongated design
- 1.0 GPF low water use
Cons
- No warm water bidet
- Smart features limited to foot kick
- Rough-in only 12 inches
Good fit if
- Those who want a bidet without electricity
- Users with a 12-inch rough-in
Skip if
- You need a warm water bidet
- You have a different rough-in size
Verdict: A clever non-electric smart toilet that keeps water use low and adds a foot pedal.
4 Best two-piece
TOTO Drake II 1G Two-Piece Elongated 1.0 GPF Universal Height Toilet
- Pieces
- Two-piece
- Bowl shape
- Elongated
- Gallons per flush
- Under 1.2 GPF
- Seat height
- Chair height
The Drake II is a classic two-piece toilet with a 1.0 GPF single flush, elongated bowl, and chair height. TOTO's CEFIONTECT surface is a stated feature that reduces waste adhesion, and the universal height suits many users. It's a solid all-rounder without smart extras.
Pros
- 1.0 GPF single flush
- CEFIONTECT surface for easier cleaning
- Elongated bowl and chair height
- Two-piece design
Cons
- No bidet or smart features
- No pressure-assisted option
- Rough-in size not stated
Good fit if
- Those who prefer a classic two-piece toilet
- Users who value surface treatment for cleaning
Skip if
- You want a smart toilet
- You need a dual-flush or pressure-assisted model
Verdict: A reliable low-flow two-piece toilet with a beneficial surface coating.
5 Best one-piece
LOS FLEXI Non Electric One Piece Toilet
- Pieces
- One-piece
- Bowl shape
- Elongated
- Gallons per flush
- Under 1.2 GPF
- Seat height
- Chair height
- Rough-in
- 12 in
This one-piece tankless toilet uses 1.0 GPF and has a 1000g MAP. Its elongated, chair-height design and 12-inch rough-in are common specifications. The one-piece construction combines the tank and bowl into a single unit.
Pros
- One-piece tankless design
- 1000g MAP
- Elongated, chair height
- 1.0 GPF low flush
Cons
- No dual flush
- No smart features
- Rough-in size limited to 12 inches
Good fit if
- Those who want a sleek tankless one-piece
- Users with a 12-inch rough-in
Skip if
- You need a smart toilet
- You want a dual-flush option
Verdict: A one-piece toilet with a 1.0 GPF flush and a 1000g MAP.
6 Best dual flush
TOTO® WASHLET® G450 1.0 or 0.8 GPF Smart Toilet
- Flush
- Dual flush
- Gallons per flush
- Under 1.2 GPF
- Bidet built in or included
- Yes
The Washlet G450 is a premium smart toilet with a dual flush system (1.0 or 0.8 GPF) and an integrated bidet seat with CEFIONTECT. It's the most feature-rich model in this list, but also the most expensive. The dual flush gives more control over water use.
Pros
- Dual flush with 0.8 and 1.0 GPF options
- Integrated bidet seat
- CEFIONTECT surface
- Smart features
Cons
- No bowl shape or height specified
- No piece configuration stated
Good fit if
- Those who want a fully integrated bidet and dual flush
- Users who value the highest level of smart features
Skip if
- You need a specific bowl shape
- You want a simple two-piece
Verdict: An all-in-one luxury solution that pushes water efficiency to its limits.
7 Best pressure-assisted
Pressure Assisted Toilet with 18.8" Comfort Tall Height
- Pieces
- Two-piece
- Bowl shape
- Elongated
- Gallons per flush
- Under 1.2 GPF
- Seat height
- Chair height
- Rough-in
- 12 in
This pressure-assisted toilet from Los Flexi delivers a powerful flush using a 1.0 GPF volume, with a tall 18.8-inch comfort height. The two-piece design and 12-inch rough-in are common, and the elongated bowl adds comfort. It's the only pressure-assisted model in the group.
Pros
- Pressure-assisted flush for strong waste removal
- 18.8-inch tall bowl
- Elongated shape
- 1.0 GPF
Cons
- No dual flush option
- No smart features
Good fit if
- Those who want a powerful flush without using more water
- Tall users needing extra height
Skip if
- You prefer a quiet flush
- You need a one-piece design
Verdict: A strong-flushing option that keeps water use at 1.0 GPF.
8 Best integrated washlet
TOTO® Glaston™ WASHLET®+ S2 Two-Piece Elongated 1.0 GPF Universal Height
- Pieces
- Two-piece
- Bowl shape
- Elongated
- Gallons per flush
- Under 1.2 GPF
- Seat height
- Chair height
- Bidet built in or included
- Yes
The Glaston pairs a two-piece toilet with an integrated WASHLET+ S2 bidet seat, all in an elongated, chair-height design with 1.0 GPF flush. It includes CEFIONTECT and comes from a well-known manufacturer. This offers many features without the full smart-toilet complexity of the G450.
Pros
- Integrated bidet seat
- Elongated, chair height
- 1.0 GPF
- CEFIONTECT surface
Cons
- No dual flush
- Two-piece may be bulkier
- Rough-in not stated
Good fit if
- Those who want a bidet with a traditional two-piece toilet
- Users who prefer chair height and elongated
Skip if
- You need a tankless design
- You want a dual flush
Verdict: A balanced combination of bidet convenience and low water use.
Specifications side by side
| # | Toilet | Pieces | Bowl shape | Flush | Gallons per flush | Seat height | Rough-in |
|---|---|---|---|---|---|---|---|
| 1 | HOROW 17 Inch High Elongated Toilet with ADA Chair Height | Two-piece | Elongated | Single flush | Under 1.2 GPF | Extra tall | not stated |
| 2 | Casta Diva Smart Toilet with Tank | not stated | not stated | not stated | Under 1.2 GPF | not stated | not stated |
| 3 | Non Electric Bidet Toilet Black | One-piece | Elongated | not stated | Under 1.2 GPF | Chair height | 12 in |
| 4 | TOTO Drake II 1G Two-Piece Elongated 1.0 GPF Universal Height Toilet | Two-piece | Elongated | not stated | Under 1.2 GPF | Chair height | not stated |
| 5 | LOS FLEXI Non Electric One Piece Toilet | One-piece | Elongated | not stated | Under 1.2 GPF | Chair height | 12 in |
| 6 | TOTO® WASHLET® G450 1.0 or 0.8 GPF Smart Toilet | not stated | not stated | Dual flush | Under 1.2 GPF | not stated | not stated |
| 7 | Pressure Assisted Toilet with 18.8" Comfort Tall Height | Two-piece | Elongated | not stated | Under 1.2 GPF | Chair height | 12 in |
| 8 | TOTO® Glaston™ WASHLET®+ S2 Two-Piece Elongated 1.0 GPF Universal Height | Two-piece | Elongated | not stated | Under 1.2 GPF | Chair height | not stated |
How the picks were chosen
We began with a pool of eight toilets that meet the under 1.2 GPF specification from the site's catalogue. We shortlisted all eight because each offers a different combination of bowl shape, flush type, height, and extra features. We compared specifications such as bowl shape, piece configuration, flush mechanism, and smart capabilities. Prices shown are live and read from the listings at the time of writing. We did not test any of these units; all selections are based on the published product information and manufacturer specifications.
Picking the right one for you
Understanding GPF (Gallons Per Flush)
GPF stands for gallons per flush, the amount of water used each time you flush. The current federal standard is 1.6 GPF, but many modern toilets use significantly less. The EPA's WaterSense program certifies toilets that use 1.28 GPF or less and meet performance criteria. This guide focuses on models under 1.2 GPF, which are even more efficient than the WaterSense threshold.
Bowl Shape: Round vs. Elongated
Round bowls are shorter and save space, while elongated bowls provide more comfort and are preferred by many. Elongated bowls are the standard in residential bathrooms today. Most of the models in this guide are elongated, which is a good choice if you have enough floor space.
Height and ADA Compliance
Chair height, also called comfort height, is typically 17 to 19 inches from floor to seat, matching a standard chair. The Americans with Disabilities Act (ADA) specifies this range for accessible fixtures. Toilets with chair height are easier to stand up from and are often labeled as ADA compliant. Some models, like the HOROW 17-inch, offer extra tall options for those who need even more height.
Two-Piece vs. One-Piece vs. Tankless
Two-piece toilets have a separate tank and bowl, making them easier to handle and often less expensive. One-piece toilets combine the tank and bowl into a single unit, which can be easier to clean and has a sleek look. Tankless toilets use an inline water supply and can be more compact but may require higher water pressure to operate effectively.
Single Flush vs. Dual Flush
Single flush toilets use the same water volume for every flush, while dual flush models offer two options: a reduced flush for liquid waste and a full flush for solid waste. Dual flush toilets can save more water, but they require users to select the appropriate button. In this guide, the TOTO Washlet G450 offers a dual flush with 0.8 and 1.0 GPF options.
Smart Toilets and Bidet Features
Smart toilets often include integrated bidet seats, warm water, air dryers, and self-cleaning functions. They can be electric or non-electric. Non-electric models, like the Los Flexi foot kick, offer basic bidet and flushing features without requiring a power outlet. Electric models, such as the Casta Diva, provide warm water and foam dispensers for added comfort.
Questions
What does GPF mean?
GPF stands for gallons per flush, the amount of water used per flush. Under 1.2 GPF is more efficient than the federal standard of 1.6 GPF. The EPA's WaterSense program labels toilets that use 1.28 GPF or less and meet performance criteria. Models in this guide go even lower, typically 1.0 or 1.06 GPF.
Is a 1.0 GPF toilet enough to flush properly?
Yes, modern low-flow toilets meet the performance requirements of the WaterSense program, which includes waste extraction and bowl cleaning tests. For example, the Los Flexi model has a 1000g MAP. This indicates the toilet is designed to clear waste effectively.
What is chair height?
Chair height, also called comfort height, is typically 17 to 19 inches from floor to seat. This matches the height of a standard chair and makes sitting and standing easier. Many toilets labeled ADA compliant have chair height. The HOROW 17-inch model offers extra tall height for those who need more.
What is the difference between two-piece and one-piece toilets?
Two-piece toilets have a separate tank and bowl, making them easier to lift and often more affordable. One-piece toilets mold the tank and bowl together, which simplifies cleaning and gives a modern appearance. Tankless toilets omit the tank entirely and use a direct water connection, but they may require a certain water pressure.
Are under 1.2 GPF toilets available with bidet features?
Yes, several models in this list combine low water use with bidet functions. The Casta Diva smart toilet includes warm water and a foam dispenser. The Los Flexi non-electric bidet offers a foot kick flush and self-cleaning. The TOTO Washlet G450 and Glaston also integrate bidet seats while keeping flush volume at or below 1.0 GPF.
Revision notes
- : First published.