A leaking fill valve or failing flush mechanism usually calls for a small repair kit. Replacing the entire toilet is a different project, and the eight options below fall into that larger category. They give you coordinated one-piece designs, different flush systems, comfort heights, and finishes for a bathroom renovation or a more accessible everyday setup.
Before you order, measure the rough-in, available floor space, and connection layout. Your own toilet, floor bolts, and water supply may not match the listed dimensions, so fit deserves the same attention as color and flush performance.
The Lineup, Simplified
Casta Diva Elongated One-Piece Toilet, 17-Inch Comfort Seat
Casta Diva One-Piece Toilet, 17-Inch Gold Seat
Casta Diva One-Piece Toilet, 17.5-Inch Comfort Seat
Casta Diva One-Piece Toilet, 17.5-Inch Gold Seat
Casta Diva Elongated One-Piece Toilet, 17.2-Inch Gold
Casta Diva One-Piece Toilet, 17.2-Inch Silver Seat
Casta Diva Compact One-Piece Toilet, Dual Flush
Casta Diva Elongated One-Piece Toilet, 17.2-Inch Seat
A Deeper Look At The Lineup
A bathroom renovation often exposes the gap between an easy-to-clean exterior and a comfortable daily fixture. This Casta Diva model brings those needs together with a skirted one-piece body, an elongated bowl, and a 17-inch seat, making it a practical starting point for a standard residential replacement.
Its dual-flush control gives you 1.1 gallons per flush for liquid waste and 1.6 gallons for solid waste, while the 1000-gram MAP rating describes its siphon-jet performance. The integrated tank also removes the exposed tank-to-bowl junction, so you have fewer exposed seams to clean.
Points In Its Favor
- The dual-flush choices let you use less water for lighter waste and reserve the larger flush for solids.
- The soft-close, quick-release seat lowers gradually and releases from the hinges for cleaning.
- Its one-piece skirted profile presents fewer visible edges around the base, which helps with routine wiping.
- The listed 12-inch rough-in and included mounting hardware simplify planning a direct replacement.
Things To Consider
- The toilet measures 27.17 inches deep, so verify that the bowl can open without striking a nearby wall or door.
- This is a complete fixture rather than a component kit, making it a heavier renovation decision than replacing one internal part.
Key Specs
Made For
You benefit most from this model in a residential bathroom renovation where a 17-inch comfort seat, dual flushing, and a streamlined one-piece exterior fit your space.
A Better Fit Elsewhere
Casta Diva Compact One-Piece Toilet, Dual Flush is the better fit for a powder room where 24.5 inches of depth makes the difference.
Gold hardware can make a compact bathroom feel deliberately designed, and this model places that detail on a functional one-piece toilet. It suits a renovation in which the flush system matters, but the visual finish needs to coordinate with the rest of the room rather than stand apart from it.
The 17-inch seat and dual flush system make it more useful than a purely decorative replacement. You get 1.1 gallons per flush for liquids, 1.6 gallons for solids, and a siphon-jet system with a listed MAP rating of 1000 grams.
Useful Highlights
- The gold button adds a decorative focal point to an otherwise smooth, skirted profile.
- Dual flushing provides a practical response to different waste types rather than sending every use through the same cycle.
- The 17-inch seat offers a comfortable-height starting point for shared bathrooms.
- Quick-release seat hinges make routine bowl cleaning less awkward.
Worth Noting
- The listed 27.17-inch depth calls for a careful measurement in a narrow bathroom, particularly with the lid raised.
- The gold accent is a deliberate style choice, so it may work better with metallic hardware than with a strictly all-white room.
Built With In Mind
You get the most from this model in a design-conscious bathroom where the 17-inch seat and dual-flush operation are as important as the gold detailing.
Another Choice May Suit
Casta Diva One-Piece Toilet, 17.5-Inch Gold Seat offers the same decorative direction with a half-inch taller seat for a room where accessibility takes priority.
Seat height becomes a practical issue when you are moving from a lower fixture or designing a bathroom around easier transfers. At 17.5 inches, this model offers the tallest listed seat in the group while retaining an elongated bowl and a clean skirted base.
The flush system is designed around a 1000-gram MAP rating, while the glazed trapway supports waste movement. Its two flush volumes are lower than those of the 17-inch Casta Diva model, at 1.0 and 1.28 gallons per flush.
The Case For It
- The 17.5-inch seat provides more knee and hip clearance than the 17-inch versions in the lineup.
- The 1.0-gallon liquid flush can reduce water use during lighter visits.
- Manufacturer estimates put annual savings at up to 16,500 gallons when compared with a 3.5-gallon toilet.
- The soft-close PP seat descends quietly and releases with one button for cleaning.
- The included fill valve, flush valve, wax seal, seat, and mounting hardware cover the core installation pieces.
Practical Considerations
- A 17.5-inch seat can feel unnecessarily tall to a shorter user, so compare it with the 17.2-inch models before ordering.
- The 25.39-inch depth still needs adequate clearance from the wall and any door swing.
Feature Snapshot
Right Fit For
You benefit most from this model in a bathroom planned around a 17.5-inch comfort seat, particularly when easier sitting and standing guide the layout.
Look Elsewhere When
Casta Diva Compact One-Piece Toilet, Dual Flush is the smarter choice for a very small room where front clearance matters more than maximum seat height.
A taller seat and a gold accent solve two different parts of a bathroom plan. This Casta Diva model combines a 17.5-inch chair-height seat with a decorative button, giving you a coordinated fixture without turning it into an oversized design statement.
Like the 17.5-inch white version, it uses 1.0- and 1.28-gallon dual flushing, a 1000-gram MAP-rated siphon-jet system, and a fully glazed trapway. That makes it a practical choice for a design renovation where water-conscious operation and appearance both carry weight.
Notable Gains
- The gold control provides a noticeable detail while the surrounding body maintains a clean modern profile.
- Its 17.5-inch seat adds useful transfer clearance for a bathroom designed around higher seating.
- The lower-volume flush handles liquid waste at 1.0 gallon per flush.
- One-button seat release supports more thorough cleaning around the hinges.
Trade Offs
- The 26.57-inch overall height and 25.39-inch depth require more vertical and floor space than the compact choice.
- The taller seat may not suit every shorter household member, even though it offers useful accessibility benefits.
Whose Shelf It Belongs On
You get the most from this model in a polished bathroom that needs both a 17.5-inch comfort seat and a coordinated gold accent.
Where A Sibling Pick Shines
Casta Diva One-Piece Toilet, 17-Inch Gold Seat is the better fit for a coordinated room where 17 inches of seat height feels more comfortable.
Older plumbing can make flushing performance harder to judge from appearance alone, so the air-pressure-assisted design here is worth noting. It is built around a 1.0-gallon flush, a siphon-jet system, and a listed 1000-gram MAP rating without requiring an electrical connection.
You can operate the flush with a foot-kick or a side button, which reduces the need to lean over the bowl. The 17.2-inch seat, elongated profile, and brushed gold finish make this a practical renovation option for a modern accessible bathroom.
Positive Takeaways
- Foot-kick and side-button operation support hands-free use in several daily situations.
- The air-pressure-assisted tank is intended to maintain flushing in lower-pressure environments.
- Using 1.0 gallon per flush gives this model a straightforward water-consumption figure.
- The soft-close lid reduces abrupt movement, which is useful in a shared or nighttime bathroom.
- No electrical hookup is required, simplifying installations in bathrooms without an available outlet.
Some Limits To Know
- Unlike the dual-flush models, this toilet uses one listed 1.0-gallon volume for every flush.
- Its 26.9-inch depth and 17.2-inch seat height require the same clearance check as any elongated comfort-height fixture.
Quick Facts
Made For
You benefit most from this model in a bathroom renovation seeking hands-free operation, a non-electric installation, and a fixed 1.0-gallon flush.
Consider Something Else When
Casta Diva One-Piece Toilet, 17.5-Inch Comfort Seat is the better fit when separate liquid and solid flush volumes take priority over hands-free controls.
Silver finishes often fit cool-toned bathrooms with less visual warmth than gold, and this model uses that finish on a hands-free one-piece fixture. Its foot-kick or side-button flushing gives you a way to operate the toilet without reaching toward the tank.
The built-in air-pressure-assisted system uses 1.0 gallon per flush and carries a 1000-gram MAP rating. A 17.2-inch comfort seat and elongated bowl keep the focus on daily usability rather than a low-profile, compact footprint.
The Helpful Details
- The brushed silver finish offers a restrained alternative to the gold models in the lineup.
- Foot-kick activation is useful when reaching or twisting would be inconvenient.
- Its 1.0-gallon flush reduces the number of gallons used for each activation.
- The soft-close seat and lid lower gradually, reducing the sharp movement of a standard hinge.
Where It May Fall Short
- The fixed 1.0-gallon flush does not provide the separate liquid and solid choices offered by the dual-flush models.
- At 26.9 inches deep, it is less suitable for the tightest powder room layouts than the compact model.
Who It Suits Best
You get the most from this model in a cool-toned accessible bathroom that values hands-free flushing and a neutral metallic finish.
Swap It Out When
Casta Diva Elongated One-Piece Toilet, 17.2-Inch Gold is the better fit for a bathroom whose accessories and hardware center on warm gold tones.
A powder room can feel crowded before the toilet is even installed, so a shorter bowl often solves the layout before aesthetics enter the conversation. This compact round model measures 24.5 inches deep, making it the shortest footprint listed here.
You still get separate 0.8- and 1.28-gallon flush choices, along with a 1000-gram MAP-rated siphon-jet system. The 16.25-inch seat offers a moderate comfort height, while the quick-release hinges make cleaning around the seat easier.
Notable Upsides
- The 24.5-inch depth preserves more usable floor space than the elongated alternatives.
- A 0.8-gallon liquid flush gives you the lowest listed flush volume in the group.
- The seamless one-piece body has fewer exposed joints for routine cleaning.
- The soft-close hinges lower the seat quietly, and the release button lets you remove it without tools.
- Preinstalled fill and flush valves, a wax seal, and mounting hardware support installation.
Where It Is Less Suited
- The 16.25-inch seat is shorter than the 17.2- and 17.5-inch comfort-height models.
- The round bowl saves space but offers less front depth than an elongated bowl for seated users.
Core Details
Best Suited To
You benefit most from this model in a small powder room where a short footprint matters more than a taller comfort seat.
Reach For A Different Pick When
Casta Diva One-Piece Toilet, 17.5-Inch Comfort Seat is the better fit for a room designed around a higher seat and an elongated bowl.
Sometimes the easiest bathroom upgrade comes down to reducing how often you reach for the flush control. This elongated one-piece model offers foot-kick or side-button operation, so you can flush without bending over the bowl or touching the side control.
The air-pressure-assisted tank uses 1.0 gallon per flush and requires no electrical connection. Its 17.2-inch comfort seat adds a practical height, while the elongated bowl gives you a longer seating profile than the compact round option.
What Helps Most
- Two flushing methods give you flexibility in how you operate the fixture each day.
- The non-electric design avoids the need for an outlet near the toilet.
- The 1.0-gallon flush offers a clearly defined water-use figure.
- The 17.2-inch seat and elongated bowl support a taller, more elongated seating position.
Details To Watch
- The fixed 1.0-gallon flush does not give you separate volumes for liquid and solid waste.
- As a complete toilet, it requires more space and planning than a component-level repair kit.
Technical Reference
Who Should Grab It
You benefit most from this model in a hands-free bathroom renovation with enough space for an elongated 17.2-inch comfort-height toilet.
Not Your Match When
Casta Diva Compact One-Piece Toilet, Dual Flush suits you better when a short 24.5-inch footprint matters more than hands-free controls.
What to Check Before Replacing a Complete Toilet
Rough-In and Floor Clearance
Rough-in is the distance from the finished wall to the center of the toilet’s floor bolts, and it determines whether the fixture can connect to your existing layout. Seven of the listed models use a 12-inch rough-in, while the remaining model’s connection dimensions need to be confirmed before purchase. Measure the bowl’s full depth too, including space needed for the lid and nearby doors.
Flush Volume and Water Pressure
Dual-flush models let you match the flush to the waste, with listed choices ranging from 0.8 to 1.6 gallons per flush. The air-pressure-assisted options use a fixed 1.0-gallon cycle and are intended for lower-pressure environments. A MAP rating describes siphon-jet performance, so you can compare the 1000-gram ratings across the lineup on the same scale.
Seat Height and Bowl Shape
Comfort-height choices run from 16.25 to 17.5 inches, which is a meaningful difference for sitting and standing. The compact round bowl favors space savings, while the elongated models provide a longer seating area. Choose based on your bathroom measurements and the users who will use the fixture most often.
Included Installation Pieces
A complete toilet needs more than the ceramic body, and the listed packages vary in what they include. Several models provide preinstalled fill and flush valves, a seat and lid, a wax seal, and mounting hardware. Review the package contents alongside your plumbing connections so you know which parts are already on hand.
Before the Bathroom Project Begins
Mistakes Worth Dodging
A common mistake is focusing on seat height or finish before checking rough-in, which can leave a beautifully chosen toilet unable to connect. Another is confusing a complete replacement with a small repair kit. Measure the centerline, wall clearance, and door swing first, then plan the fixture around those fixed dimensions.
What Separates Premium From Basic
Higher-tier fixtures often add value through finish coordination, easier seat removal, quieter hinges, or more flexible flushing controls. Those details matter most in a finished bathroom where touches and sounds become part of daily use. A simpler model can still make sense when compact dimensions and straightforward installation lead your priorities.
Frequently Asked Questions for Toilet Repair Kits
Are These Repair Kits or Complete Toilets?
These are complete one-piece toilets rather than component kits for repairing a fill valve, flapper, or flush valve. You replace the whole fixture and confirm the installation connections before selecting one.
Which Model Has the Tallest Seat?
Casta Diva One-Piece Toilet, 17.5-Inch Comfort Seat and Casta Diva One-Piece Toilet, 17.5-Inch Gold Seat have the tallest listed seats at 17.5 inches. A shorter user may find one of the 17.2-inch or 16.25-inch models more comfortable.
Which Toilet Fits the Smallest Bathroom?
Casta Diva Compact One-Piece Toilet, Dual Flush has the shortest listed depth at 24.5 inches. Its round bowl helps save space, although you give up the longer seating profile of an elongated model.
Do Any of These Toilets Require Electricity?
Casta Diva Elongated One-Piece Toilet, 17.2-Inch Gold, Casta Diva One-Piece Toilet, 17.2-Inch Silver Seat, and Casta Diva Elongated One-Piece Toilet, 17.2-Inch Seat operate without electricity. Their built-in flushing systems use the toilet’s water supply rather than an electrical connection.
What Is a MAP Flush Rating?
A MAP rating evaluates toilet flush performance on a standardized scale, so the 1000-gram figures listed here provide a common comparison point. It is useful alongside bowl design, trapway construction, water volume, and the pressure available in your home.
Final Verdict
Your best path depends on the space you have and the way you use the bathroom. Compact rooms favor the 24.5-inch round model, higher seating needs point toward the 17.5-inch options, and hands-free operation makes the air-pressure-assisted models worth a close look. Measure first, then let the layout and daily habits guide your choice.