Best Casta Diva Toilets 2026: 10 Picks Compared on Specs

Latest update: Oct 14, 2026

The Casta Diva lineup includes simple one-piece models and smart bidet toilets with multiple features. For most homes, the K030 smart toilet stands out: it pairs a bidet with a 1000g MaP flush capacity and auto open convenience, all in one fixture. To build this list we compared every Casta Diva toilet in the catalogue on stated specs, including flush volume, seat height, and smart features, with live prices read from the listing.

10 picks from 12 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 a compact bathroom: The compact one-piece with dual flush (0.8/1.28 GPF) fits tight spaces and saves water without sacrificing a modern look. See pick 3
• For an accessible height: The one-piece with 17.2-inch comfort height seat reduces the strain of sitting and standing, making it a sensible pick for older users. See pick 2
• For a full smart experience: The K030 with auto open, bidet, and 1000g MaP flush brings convenience and thorough cleaning in a single fixture. See pick 1

Our 10 picks

1 Best overall smart toilet

Casta Diva Smart Toilet

Bidet built in or included

Yes

$1,199.99 (as of 10/14/2026 22:46 PDT - Details)

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This model combines a built-in bidet, auto open, and a 1000g MaP flush capacity, the highest flush capacity among the smart picks. It lacks a stated seat height, but its feature set covers the essentials most buyers want from a smart toilet.

Pros

• 1000g MaP flush capacity, highest in this list
• Auto open operated without touching the lid
• Built-in bidet with warm water functions (per listing)

Cons

• Seat height not stated by the seller
• No ADA comfort height specification
• Requires electrical and water connections

Good fit if

• Users who want a single fixture with bidet and hands-free opening
• Those upgrading from a separate bidet seat and toilet

Skip if

• You need a specific chair height for accessibility
• You prefer a non-electric, mechanical bidet

Verdict: The K030 is the most complete Casta Diva smart toilet here, offering a strong flush and auto open in one package.

2 Best elongated one-piece

Casta Diva Elongated One Piece Toilet with 17.2" Comfort Height Seat

Pieces

One-piece

Bowl shape

Elongated

Seat height

Chair height

$319.99 (as of 10/14/2026 22:46 PDT - Details)

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The elongated bowl and 17.2-inch comfort seat make it the roomiest non-smart option in the lineup. The one-piece design simplifies cleaning compared with two-piece toilets, though the other one-piece model has nearly the same height.

Pros

• Elongated bowl provides extra seat area
• 17.2" seat height, stated as comfort height
• One-piece design with fewer crevices

Cons

• Flush volume not stated by the seller
• Gold finish may not suit all bathrooms
• No bidet or smart features

Good fit if

• Homeowners who prefer a classic elongated bowl
• People who want a taller seat without going smart

Skip if

• You need a bidet or automated flushing
• Your bathroom is tight on floor length

Verdict: A straightforward, roomy one-piece that prioritizes seat comfort and elongated design over electronics.

3 Best compact dual flush

Casta Diva Compact One Piece Toilet for Bathrooms

Pieces

One-piece

Flush

Dual flush

Gallons per flush

1.2 to 1.4 GPF

Compact

Yes

View on Amazon

This dual-flush model offers 0.8/1.28 gallons per flush, the lowest full-flush volume among the non-smart toilets. Its compact footprint and one-piece construction make it a strong fit for guest baths or small powder rooms.

Pros

• Dual flush with 0.8/1.28 GPF, low water use
• Compact design for tight spaces
• One-piece, easy to clean

Cons

• Bowl shape not specified (assumed round front)
• No chair height specification
• No bidet or smart features

Good fit if

• Small bathrooms and half baths
• Eco-conscious users who prefer a manual dual flush

Skip if

• You require an elongated bowl
• You want automatic flushing or a bidet

Verdict: The compact dual flush is the best choice for saving space and water in a non-electric toilet.

4 Best one-piece chair height

Casta Diva One Piece Toilet with 17" Comfort Chair Height Seat

Pieces

One-piece

Seat height

Chair height

$249.99 (as of 10/14/2026 22:46 PDT - Details)

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This model offers a 17-inch comfort chair height in a one-piece design, essentially the same seat height as the elongated version but without the elongated bowl. It’s a simpler, more traditional option for those who don’t need extra bowl length.

Pros

• 17" seat height matches ADA comfort range
• One-piece construction
• Simpler fixture than the smart toilets

Cons

• Bowl shape not stated
• Flush volume not specified
• No bidet or smart options

Good fit if

• Users who want a taller seat without electronics
• Those who prefer a round-front bowl for smaller spaces

Skip if

• You need an elongated bowl
• You want a smart bidet toilet

Verdict: A dependable one-piece with a chair-height seat, ideal for accessibility without extra features.

5 Best ADA-compliant smart toilet

Casta Diva Smart Toilet with Auto Open Close

Seat height

Chair height

Bidet built in or included

Yes

View on Amazon

This K050Max model explicitly lists ADA comfort height, making it the only smart toilet in the pool with a stated accessible seat height. It also includes auto open/close, which reduces physical effort, a key consideration for mobility-limited users.

Pros

• ADA comfort height specified
• Auto open and close
• Smart bidet functions

Cons

• No flush volume or MaP capacity stated
• Higher price tier (not a budget pick)
• Requires power and plumbing connections

Good fit if

• Users who need an accessible seat height with smart conveniences
• Those who want hands-free opening and closing

Skip if

• You’re on a tight budget
• You prefer a manual toilet without electrical hookups

Verdict: The K050Max combines ADA height with smart features, making it the best accessible smart toilet in the lineup.

6 Best foot sensor bidet

Casta Diva Smart Toilet with Bidet Built

Gallons per flush

1.2 to 1.4 GPF

Bidet built in or included

Yes

$599.99 (as of 10/14/2026 22:46 PDT - Details)

View on Amazon

The CD-K020 includes a foot sensor for flushing, plus a bidet and a 1.28 GPF flush volume, the only smart model in the pool with a water-use specification. That makes it a good balance of hands-free operation and water efficiency.

Pros

• 1.28 GPF, meets WaterSense efficiency threshold
• Foot sensor for flushing
• Built-in bidet

Cons

• MaP flush capacity not stated
• No seat height information
• May require user facing sensor orientation (not specified)

Good fit if

• Users who want to avoid touching the flush button
• Those prioritizing water savings in a smart toilet

Skip if

• You need an ADA comfort height
• You want a high MaP flush capacity for heavy use

Verdict: A smart bidet toilet with a foot sensor and efficient 1.28 GPF flush, ideal for hands-free, low-water operation.

7 Best non-electric bidet

CASTA DIVA CD-W10V Non-Electric Bidet Toilet

Bowl shape

Elongated

Bidet built in or included

Yes

$419.00 (as of 10/14/2026 22:46 PDT - Details)

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The CD-W10V is labeled non-electric, so it relies on water pressure alone for the bidet. Its elongated bowl and gold finish match the other Casta Diva models, but it requires no power, simplifying installation for existing bathrooms.

Pros

• Non-electric, no outlet needed
• Elongated bowl for comfort
• Bidet function built in

Cons

• Seat height and flush volume not stated by the seller
• Gold finish may not match all decor
• Non-electric bidets typically offer only cold water (not specified)

Good fit if

• Bathrooms without an electrical outlet near the toilet
• Users who want a simple bidet without electronics

Skip if

• You want warm water or heated seat
• You need an ADA comfort height

Verdict: The non-electric CD-W10V provides bidet functionality without wiring, a practical choice for retrofit projects.

8 Best full-featured smart toilet

Casta Diva Smart Toilet with Bidet Built

Seat height

Chair height

Bidet built in or included

Yes

$1,599.99 (as of 10/14/2026 22:46 PDT - Details)

View on Amazon

This model bundles auto open/close, foot sensor, 1000g MaP flush capacity, and ADA comfort height, covering every major feature offered across the Casta Diva smart lineup. It’s the most feature-dense pick in the pool.

Pros

• 1000g MaP flush capacity
• Auto open and close plus foot sensor
• ADA comfort height listed

Cons

• Only one finish mentioned (gold)
• No water consumption (GPF) specified
• Requires both electrical and plumbing connections

Good fit if

• Tech-savvy users who want every automation
• Those needing both accessibility and hands-free controls

Skip if

• You prefer a simpler, lower-maintenance toilet
• You don’t want to rely on sensors

Verdict: The fullest featured Casta Diva smart toilet, combining all major conveniences in one unit.

9 Best foam shield smart toilet

Casta Diva Smart Toilet with Bidet Built

Bidet built in or included

Yes

$839.99 (as of 10/14/2026 22:46 PDT - Details)

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This smart toilet adds a foam shield function, a feature not found in other picks, and also includes auto open and a bidet. The foam shield is designed to reduce splashes and keep the bowl clean, based on the product listing.

Pros

• Foam shield function reduces splash and odor (per listing)
• Auto open lid
• Built-in bidet

Cons

• No MaP or GPF specification
• Seat height not stated
• Foam shield requires consumable foam refills (not included)

Good fit if

• Users who want extra hygiene from a foam barrier
• Those who value a self-cleaning bidet toilet

Skip if

• You don’t want to buy refill foam cartridges
• You need a precise water usage specification

Verdict: The foam shield distinguishes this smart toilet, offering an additional layer of cleanliness beyond standard bidet functions.

10 Best low-flow smart with tank

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)

View on Amazon

This model uses a tank and is rated for 1.06 gallons per flush, the lowest GPF among all picks. Warm water and a foam dispenser add comfort, while the tank design may be more familiar to those swapping out a conventional toilet.

Pros

• 1.06 GPF, lowest flush volume in this list
• Tank design, similar to traditional toilets
• Warm water and foam dispenser

Cons

• MaP flush capacity not stated
• Seat height not specified
• Tank adds bulk compared with tankless smart toilets

Good fit if

• Users prioritizing maximum water savings
• Those who prefer the look and operation of a tank toilet

Skip if

• You want a sleek tankless design
• You need a higher flush capacity for heavy use

Verdict: The most water-efficient smart pick, offering warm water and foam in a traditional tank form factor.

Specifications side by side

How the picks were chosen

The pool for this comparison comprises 10 Casta Diva toilets currently listed in the catalogue. All 10 are included because the pool is small enough to cover completely. Picks were selected based solely on stated specifications, such as piece count, bowl shape, flush mechanism, and advertised smart capabilities. We did not physically test any unit and did not consider customer reviews or price-dependent rankings. Prices shown on the page are live, read from the store listing at the time of writing, and may change.

Picking the right one for you

Smart vs. conventional

Casta Diva’s lineup splits between electric smart toilets with bidets and sensors, and simpler one-piece or conventional models. Smart toilets add convenience and hygiene, but they require a nearby outlet and more complex installation. Conventional models are easier to retrofit and have fewer parts to fail. Decide whether hands-free opening, warm water, and bidet cleaning are worth the added plumbing and electrical work.

Seat height and ADA accessibility

Several picks list a comfort chair height of 17 inches or higher, meeting the typical ADA guideline for toilet seat height. If you or someone in your household has mobility issues, look for models that explicitly state a 17-inch seat or label themselves ADA compliant. The K050Max and the elongated one-piece both do, while other smart picks leave the height unspecified.

Flush efficiency and water use

The EPA WaterSense program recognizes toilets that use 1.28 gallons per flush or less. Among these picks, the CD-K020 at 1.28 GPF and the tank model at 1.06 GPF are the most efficient. The compact dual flush offers a 0.8-gallon reduced flush, while several smart models do not list any GPF number. If water savings are a priority, check the product specifications page for a flush volume figure.

Bowl shape and space

Elongated bowls provide more seat area but require roughly two inches more front-to-back space. The only elongated models here are the non-smart one-piece and the CD-W10V non-electric bidet. If your bathroom is tight, consider the compact one-piece with a round bowl (though its shape is not explicitly stated). Measure your rough-in distance and clear floor area before choosing.

Bidet features and maintenance

Bidet toilets generally offer a wand that cleans with water, but the specifics vary: warm water, foam shields, foot sensors, and auto open are add-ons. Warm water and foam systems need electricity and occasional refills or maintenance. Non-electric bidets use only cold water but have no pumps or heaters. Consider how much servicing you’re willing to do when picking between the electric and non-electric models.

Installation requirements

All toilets need a standard floor flange and a supply line, but smart models also need a grounded outlet within reach. Some smart toilets are tankless, which means they need higher water pressure and a bigger supply line. The tank-based smart toilet may be easier for retrofits. Always check the product listing for rough-in dimensions and electrical requirements before hiding your current unit.

Questions

What does MaP measure?

MaP (Maximum Performance) is an independent test that measures how many grams of waste a toilet can clear in a single flush. A higher number indicates stronger flushing capability. Two Casta Diva smart toilets in this list state a 1000g MaP result, which is a high-performance threshold. Models without a published result may still flush well, but their capacity isn't officially documented.

Are Casta Diva toilets WaterSense labeled?

Only the CD-K020 lists a flush volume of 1.28 gallons per flush, which would qualify for WaterSense certification if it carries the label. The compact dual flush uses 0.8/1.28 GPF, and the tank model uses 1.06 GPF, both under the WaterSense threshold. None of the product listings explicitly mention the WaterSense logo, so check the packaging or manufacturer specs to confirm certification.

Do smart toilets need a nearby electrical outlet?

Yes, every smart toilet in this pool requires electricity for features like auto open, warm water, or foam dispenser. The only exception is the CD-W10V non-electric bidet, which doesn’t need power. Before purchasing a smart model, verify that an outlet is within reach (usually within 3 feet) and that your bathroom has a GFCI-protected circuit.

What is the difference between one-piece and two-piece toilets?

A one-piece toilet has the tank and bowl molded together as a single unit, making it easier to clean because there is no seam between the tank and bowl. Two-piece toilets have a separate tank that bolts onto the bowl, which can be easier to lift and install. All non-smart Casta Diva picks here are one-piece, while the smart toilets are tankless or tank-included designs.

Which Casta Diva toilet is best for a small bathroom?

The compact one-piece with dual flush is specifically designed for smaller spaces, though its bowl shape is not stated. If you need an elongated bowl, measure the available depth; elongated models need about 2 extra inches. The non-electric CD-W10V is also compact due to its tankless design, but it still requires room for the bidet wand.

Revision notes

• 2026-10-07: First published.

Sources

• Residential Toilets | US EPA
• WaterSense | US EPA
• 2010 ADA Standards for Accessible Design | ADA.gov