TOTO® Ultramax® One-Piece Elongated Alternatives: 6 Similar Picks Compared

How each alternative compares

HOROW T0338WB Matte Black Elongated One-Piece Toilet

The HOROW T0338WB shifts from the TOTO’s white ceramic to a matte black finish. This design choice suits modern bathrooms where dark fixtures are a priority. It keeps the one-piece elongated shape but alters the height profile. The HOROW stands 26 inches tall, which is lower than the TOTO’s 31.5-inch universal height. You get a 12-inch rough-in standard, matching the TOTO’s likely installation needs. The weight is significantly higher at 99.2 pounds. This model drops the CEFIONTECT glaze and WASHLET+ compatibility. It is a stylistic choice for those who value aesthetics over the specific cleaning technology and smart features of the original.

Casta Diva Air-Pressure ADA One-Piece

The Casta Diva Air-Pressure model uses air pressure for flushing, differing from the TOTO’s standard gravity-fed 1.6 GPF system. This approach offers high-efficiency flushing in a compact frame. The unit is ADA-compliant, matching the TOTO’s universal height. However, it lacks the CEFIONTECT glaze and SoftClose seat included with the TOTO. The dimensions are slightly narrower at 15 inches wide and shorter in length. It is designed for users who prioritize water conservation and accessible height. You give up the seamless WASHLET+ integration and the specific ceramic glaze technology. This pick is ideal for bathrooms where space and ADA compliance are key requirements over smart bidet features.

Swiss Madison St. Tropez One-Piece Toilet

The Swiss Madison St. Tropez introduces a dual-flush mechanism, offering more control than the TOTO’s single 1.6 GPF flush. It maintains the one-piece elongated design and ADA chair height. The unit is wider at 15.2 inches and slightly shorter in length. It weighs 109 pounds, making it heavier than the TOTO. You lose the CEFIONTECT glaze and the included SoftClose seat. The model does not support WASHLET+ upgrades. This toilet is a practical choice for users seeking dual-flush efficiency and accessible height. It is best for those who want water-saving flexibility without the electronic amenities or specific glaze technology found in the original TOTO Ultramax.

Casta Diva Elongated One-Piece Toilet

The Casta Diva Silver Button model features a skirted design, which differs from the TOTO’s traditional one-piece look. It maintains the elongated shape and one-piece construction. The unit is narrower at 14.6 inches and shorter in length. It lacks the CEFIONTECT glaze and SoftClose seat. There is no mention of WASHLET+ compatibility. This model is designed for users who prioritize accessibility and low-maintenance cleaning. It offers a high MAP flush score. You give up the universal height of the TOTO for a specific ADA height. This pick suits buyers who want a sleek, easy-to-clean design without the smart features or specific ceramic technology of the original.

Casta Diva Elongated One-Piece Toilet

This Casta Diva model focuses on ADA height and water efficiency. It shares the one-piece elongated design with the TOTO. The unit is narrower at 14.4 inches and shorter in length. It lacks the CEFIONTECT glaze and SoftClose seat. There is no WASHLET+ compatibility mentioned. The height is 25.4 inches, which is lower than the TOTO’s 31.5-inch universal height. This model is ideal for users who want a low-maintenance design. You give up the specific cleaning technology and smart features of the TOTO. It is a practical choice for those prioritizing accessibility and water conservation over the broader feature set of the original Ultramax.

DeerValley DV-1F0437 Elongated One-Piece

The DeerValley DV-1F0437 provides strong flushing performance with an accessible height. It shares the one-piece elongated design. The unit is narrower at 14.5 inches and slightly shorter in length. It lacks the CEFIONTECT glaze and SoftClose seat. There is no WASHLET+ compatibility mentioned. The height is 26.6 inches, which is lower than the TOTO’s universal height. This model is designed for users who prioritize function over style variety. It fits bathrooms where space allows for a longer elongated bowl. You give up the specific ceramic glaze and smart features of the TOTO. It is a solid option for those needing accessible height without the electronic amenities of the original.

Quick picks

Our 7 picks

1 Best overall

TOTO Ultramax One-Piece Toilet

Best for: traditional 1.6 GPF single-flush installations

Flush Volume

1.6 GPF

Bowl Shape

elongated

Toilet Type

one-piece

Dimensions

31.8 × 20.5 × 31.5 inches

Weight

40 pounds

View on Amazon: TOTO Ultramax One-Piece Toilet Affiliate link

You get a seamless one-piece elongated fixture measuring 31.8 inches long, 20.5 inches wide, and 31.5 inches high. It uses a single 1.6 GPF flush volume and includes an SS114 SoftClose seat alongside a CEFIONTECT ceramic glaze. It suits you if you want a standard full-volume flush with options to add WASHLET+ or Auto Flush components later.

Pros

• CEFIONTECT glaze minimizes waste adherence on ceramic surfaces
• Packaged with an SS114 SoftClose seat
• Designed for seamless T40 WASHLET+ bidet and Auto Flush upgrades
• One-piece elongated design reduces seam maintenance

Cons

• Uses 1.6 GPF with no reduced dual-flush setting
• Does not include an integrated electronic bidet out of the box

Good fit if

• You want a conventional 1.6 GPF single-flush volume with an elongated bowl.
• You plan to integrate a TOTO T40 WASHLET+ bidet seat in the future.

Skip if

• You need a dual-flush system to reduce water consumption.
• You want a pre-installed smart bidet wash system included.

Verdict: TOTO Ultramax One-Piece Elongated Toilet delivers a dedicated 1.6 GPF flush, an included SoftClose seat, and future WASHLET+ expansion for owners seeking a standard single-flush baseline.

2 Best premium

HOROW T0338WB Matte Black Elongated One-Piece Toilet

Best for: modern bathrooms seeking matte black fixtures

Flush Type

Dual flush

Flush Volume

1.1/1.6 GPF

Rough-In Size

12"

Seat Height

17.3"+

Bowl Shape

Elongated

MaP Flush Score

1000g

View on Amazon: HOROW T0338WB Matte Black Elongated One-Piece Toilet Affiliate link

The HOROW T0338WB is a matte black, one-piece elongated toilet with a 12-inch rough-in. It features a chair-height seat at 17.3 inches and a dual-flush system saving 1.1 or 1.6 gallons per flush. The fully skirted design and slow-close seat aid maintenance. This model suits users seeking a modern aesthetic with ADA-compliant comfort and water efficiency.

Pros

• Matte black finish for a modern look
• 17.3-inch chair height for easier access
• Dual-flush system saves water
• Fully skirted trapway simplifies cleaning

Cons

• Matte black finish shows water spots
• Standard gravity flush, not pressure-assisted
• Supply line sold separately

Good fit if

• You want a bold matte black toilet
• You need ADA-compliant seat height
• You prefer a one-piece design

Skip if

• You require a white toilet only
• You need a bidet seat built-in
• You have a 10-inch rough-in

Verdict: HOROW T0338WB Matte Black One-Piece Toilet offers a stylish, water-efficient option for those who value modern aesthetics and accessible height. It is ideal for bathrooms where a dark, sleek fixture is the priority.

3 Also great

Casta Diva Air-Pressure ADA One-Piece

Best for: ADA-compliant water-saving bathrooms

Flush Type

Air-pressure assisted

Flush Volume

1.0 GPF

Rough-In Size

12"

Seat Height

17.2"

Bowl Shape

Elongated

MaP Flush Score

1000g

View on Amazon: Casta Diva Air-Pressure ADA One-Piece Affiliate link

The Casta Diva is a one-piece elongated toilet featuring a 1.0 GPF air-pressure-assisted flush. It offers a 17.2-inch ADA-compliant seat height and a 1000g MaP score. The design includes a skirted base and soft-close seat. You get a full installation kit with a 12-inch rough-in. This model provides strong flushing power without requiring electricity.

Pros

• 1.0 GPF water-saving air-pressure flush
• 1000g MaP flush score
• 17.2-inch ADA-compliant seat height
• Skirted base for easy cleaning

Cons

• Flush volume is 1.0 GPF, which is lower than the 1.6 GPF standard on many competitors
• Lacks electronic bidet functions found in other smart toilet options
• Only one seat height option is available

Good fit if

• You need ADA-compliant seating height
• You want a powerful flush without electricity
• You prefer a skirted base design

Skip if

• You require a standard 15-inch seat height
• You want built-in bidet features
• You prefer a 1.6 GPF flush volume

Verdict: Casta Diva Elongated One-Piece Toilet delivers high-efficiency flushing in a compact, ADA-compliant frame. It suits users who prioritize water conservation and accessible height over electronic amenities.

4 Also great

Swiss Madison St. Tropez One-Piece Toilet

Best for: ADA height and dual flush efficiency

Flush Type

dual flush

Flush Volume

1.1/1.6 GPF

Rough-In Size

12"

Bowl Shape

elongated

Toilet Type

one-piece

Seat Height

ADA Chair Height

View on Amazon: Swiss Madison St. Tropez One-Piece Toilet Affiliate link

This Swiss Madison one-piece toilet features an elongated bowl and ADA chair height for comfort. It uses a dual vortex flush system with 1.1 or 1.6 gallons per flush. The 12-inch rough-in fits standard walls. The scratch-resistant ceramic is durable and non-porous. It suits those who want a standard white toilet with efficient flushing.

Pros

• Dual vortex flush for efficient cleaning
• ADA chair height for accessibility
• Elongated bowl for extra comfort
• Scratch-resistant ceramic construction

Cons

• Heavier at 109 pounds
• Lacks smart bidet features
• Standard white color only

Good fit if

• You need ADA height seating
• You prefer a one-piece design
• You want a dual flush system

Skip if

• You want smart bidet technology
• You prefer a matte black finish
• You need a compact round bowl

Verdict: Swiss Madison St. Tropez One-Piece Elongated Toilet is a practical choice for users seeking ADA height and efficient dual flushing without smart features.

5 Also great

Casta Diva Elongated One-Piece Toilet

Best for: ADA compliance and easy cleaning needs

Flush Type

dual flush, siphon jet

Flush Volume

1.0/1.28 GPF

Rough-In Size

12"

Seat Height

17.5"

Bowl Shape

elongated

MaP Flush Score

1000g

View on Amazon: Casta Diva Elongated One-Piece Toilet Affiliate link

This Casta Diva one-piece toilet features an elongated bowl and a 17.5-inch ADA-compliant seat height. It uses a dual-flush system at 1.0 or 1.28 GPF to save water. The siphon jet flush earns a MAP score of 1000g for effective waste removal. The skirted design hides the trapway for easier cleaning. It includes a soft-close seat and standard 12-inch rough-in fit.

Pros

• 17.5-inch ADA-compliant seat height for easier sitting and standing
• Dual-flush system offers 1.0 GPF for liquids and 1.28 GPF for solids
• MAP Flush Score of 1000g ensures powerful waste removal
• Skirted one-piece design conceals pipes for simple cleaning

Cons

• Only includes lifetime technical consulting, not a full hardware warranty
• Soft-close seat is made of PP plastic, which may feel less premium
• Dual-flush mechanism adds complexity compared to single-flush models

Good fit if

• You need an ADA-compliant height of 17.5 inches for accessibility
• You want a powerful flush with a MAP score of 1000g
• You prefer a sleek, skirted design that is easy to wipe down

Skip if

• You require a full manufacturer warranty beyond technical consulting
• You prefer a single-flush mechanism for simplicity
• You need a toilet with a premium material seat construction

Verdict: Casta Diva 17.5" ADA One-Piece Toilet fits users who prioritize accessibility and a high MAP flush score in a low-maintenance, skirted design. It is a solid option for those needing ADA compliance without the bulk of a two-piece unit.

6 Best budget

Casta Diva Elongated One-Piece Toilet

Best for: ADA height and water conservation

Flush Type

Dual flush

Flush Volume

1.1/1.6 GPF

Rough-In Size

12"

Seat Height

17"

Bowl Shape

Elongated

MaP Flush Score

1000g

View on Amazon: Casta Diva Elongated One-Piece Toilet Affiliate link

This Casta Diva one-piece toilet features an elongated bowl and a 17-inch ADA-compliant seat height. It uses a dual-flush system to save water, using 1.1 GPF for liquids and 1.6 GPF for solids. The unit includes a soft-close seat and achieves a MaP score of 1000g for effective flushing. It is designed for users who prefer a sleek, skirted design with easy-to-clean surfaces.

Pros

• Dual-flush option for 1.1 or 1.6 GPF water usage
• 17-inch ADA-compliant seat height for comfort
• MaP score of 1000g for powerful siphon flushing
• Skirted one-piece design with fully-glazed trapway
• Includes soft-close and quick-release seat

Cons

• Standard 12-inch rough-in size limits placement options
• No bidet or smart features included
• Only 1-year limited customer service warranty

Good fit if

• You need an ADA-compliant seat height
• You want a water-saving dual-flush system
• You prefer a seamless, easy-to-clean one-piece design

Skip if

• You require a smart toilet with bidet functions
• You have a non-standard rough-in size
• You want a longer warranty than one year

Verdict: Casta Diva One-Piece Elongated Toilet is a practical choice for those prioritizing ADA height and water efficiency. It suits buyers who want a low-maintenance design without smart features.

7

DeerValley DV-1F0437 Elongated One-Piece

Best for: Accessible, high-performance flushing

Flush Type

dual flush

Flush Volume

1.1/1.28 GPF

Rough-In Size

12"

Seat Height

17 1/2"

Bowl Shape

elongated

MaP Flush Score

1000g

View on Amazon: DeerValley DV-1F0437 Elongated One-Piece Affiliate link

The DeerValley DV-1F0437 is a one-piece elongated toilet with a 17 1/2-inch ADA seat height. It uses a dual-flush system for 1 or 1.28 GPF. The unit scores 1000g on the MaP scale. It measures 26.8 inches long and weighs 94.8 pounds. This model suits you if you need accessible seating and efficient water use in a compact footprint.

Pros

• 17 1/2-inch ADA-compliant seat height
• 1000g MaP flush score
• Dual-flush system saves water
• Rimless bowl design

Cons

• 94.8 pounds is heavy
• 26.8-inch length limits tight spaces
• Only available in white

Good fit if

• You need ADA height
• You want high flush power
• You prefer one-piece designs

Skip if

• You need a compact round bowl
• You cannot handle heavy items
• You want color options

Verdict: DeerValley DV-1F0437 One-Piece Toilet provides strong flushing performance and accessible height for users who prioritize function over style variety. It fits bathrooms where space allows for a longer elongated bowl.

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