A toilet auger clears stubborn clogs, while a complete toilet replaces an entire bathroom fixture. The eight options below are one-piece toilets, so you’ll find detailed comparisons of seat height, bowl length, flushing systems, water use, and installation requirements rather than auger handles or cable drums.
A Fast Comparison Of The Options
Casta Diva 17-Inch Elongated Toilet
Casta Diva 17-Inch Gold One-Piece Toilet
Casta Diva 17.5-Inch Elongated Toilet
Casta Diva 17.5-Inch Gold Elongated Toilet
Casta Diva 17.2-Inch Gold One-Piece Toilet
Casta Diva 17.2-Inch Silver One-Piece Toilet
Casta Diva Compact 0.8/1.28 GPF Toilet
Casta Diva 17.2-Inch One-Piece Toilet
More Details On Our Top Picks
A straightforward replacement for a standard bathroom, this skirted one-piece toilet combines an elongated bowl with a 17-inch seat height. Its 27.17-inch depth suits you best when the bathroom has enough clearance for an elongated fixture, while the one-piece tank-and-bowl body gives you fewer exterior joints to wipe down.
You get a dual-flush system that uses 1.1 gallons per flush for liquid waste and 1.6 gallons for solid waste. Compared with the taller Casta Diva 17.5-Inch Elongated Toilet, this option trades half an inch of seat height for a slightly shallower footprint, making the fit question more important than the height difference in many rooms.
Points In Its Favor
- The 17-inch comfort seat supports easier sitting and standing.
- Two flush volumes let you match water use to the waste load.
- The soft-close seat lowers everyday noise and prevents slamming.
- The skirted profile leaves fewer exposed curves around the base.
Things To Consider
- Measure from the finished wall before ordering, since an elongated bowl projects farther than a round model.
- The installation requires a standard 12-inch rough-in, which is the distance from the wall to the flange center.
Key Specs
Made For
You’ll appreciate this model when replacing a standard elongated toilet and want a 17-inch comfort height with adjustable flush use.
A Better Fit Elsewhere
Choose the Casta Diva 17.5-Inch Elongated Toilet instead when the extra half inch of seat height is the priority.
Your color palette gets a stronger focal point with this gold-accented version, which otherwise carries the same practical foundation as the Casta Diva 17-Inch Elongated Toilet. A 17-inch comfort seat, elongated bowl, and 27.17-inch depth make it most practical in bathrooms where appearance and familiar dimensions matter together.
The built-in gold button provides a visual detail that the white model does not offer, while the skirted base keeps the side profile clean. The dual flush uses 1.1 gallons for liquid waste and 1.6 gallons for solid waste, so you can keep the decorative finish without settling for a single fixed flush volume.
Key Advantages
- The gold button adds a coordinated detail to modern fixtures.
- The elongated bowl provides more usable space than a compact round bowl.
- A quick-release seat makes removal for cleaning more convenient.
- The included fill and flush valves reduce assembly steps.
Small Caveats
- The metallic accent calls for attention, so it suits some decorating schemes more naturally than others.
- Your available floor space should accommodate the 27.17-inch depth.
Who Will Love This
This model fits you best when a warm metallic accent can coordinate with your taps, shower hardware, or cabinet pulls.
Where A Sibling Pick Shines
The Casta Diva 17-Inch Elongated Toilet offers the same core height and flush arrangement in a more neutral finish.
The tallest seat height in this group makes this model worth a close look for anyone who finds a 17-inch chair height less comfortable. It measures 25.39 inches deep and 14.56 inches wide, with a 26.57-inch overall height, giving you a taller fixture without changing the elongated bowl format.
Its dual-flush settings use 1.0 gallon for liquid waste and 1.28 gallons for solids, lower than the 1.1-and-1.6-gallon arrangement in the Casta Diva 17-Inch Elongated Toilet. The PP seat, a polypropylene seat material, uses a soft-close hinge and quick-release button for quieter closing and easier removal.
A Few Highlights
- The 17.5-inch seat height supports a higher sitting position.
- Lower solid-waste flush volume supports water-conscious use.
- The quick-release seat simplifies routine cleaning.
- A fully skirted body simplifies wiping around the base.
Where It May Fall Short
- The 26.57-inch overall height may feel tall in a compact bathroom.
- Its 25.39-inch depth still calls for a clearance check before installation.
Feature Snapshot
Best Suited To
You’ll find this model useful when higher seating is the main comfort consideration in a replacement project.
Another Choice May Suit
The Casta Diva Compact 0.8/1.28 GPF Toilet serves you better when short floor depth matters more than elongated bowl space.
This gold version combines the tallest seat in the roundup with the visual warmth of a metallic accent. It suits you especially well when a bathroom project combines accessible seating with a coordinated gold flush button and a clean, skirted silhouette.
The flushing system shares the Casta Diva 17.5-Inch Elongated Toilet’s 1.0-gallon liquid flush and 1.28-gallon solid flush, along with a stated 1,000-gram MaP performance rating. That rating represents a measured waste-removal performance figure, while the fully glazed trapway helps waste move through the bowl.
What Pays Off
- The 17.5-inch seat height adds useful clearance for sitting and standing.
- The gold button complements warm metallic bathroom hardware.
- Separate flush volumes accommodate different waste loads.
- The quick-release seat supports convenient removal and cleaning.
- The one-piece skirted form reduces exposed exterior connections.
Practical Considerations
- Verify your doorway and bathroom clearance because the fixture is 26.57 inches tall overall.
- A standard 12-inch rough-in is required, so your existing flange position needs to match.
Right Fit For
This option suits your bathroom when a higher seat and a coordinated gold finish both belong near the top of your replacement priorities.
Look Elsewhere When
The Casta Diva 17.2-Inch Gold One-Piece Toilet gives you a slightly lower profile and a different flushing arrangement.
A foot-kick or side-button flush changes the daily rhythm for you, especially in a shared bathroom or renovation without an electrical outlet. This gold model combines that hands-free operation with an air-pressure-assisted flush, an integrated tank, and a 1.0-gallon water-saving setting.
The 17.2-inch comfort seat is lower than the 17.5-inch model, while the stated 26.9-by-15-by-19.3-inch dimensions describe a different overall profile from the taller comfort options. The vitreous china body has a skirted base and a soft-close lid, and no electricity is required for the flushing system.
What Works In Its Favor
- Foot-kick operation offers a hands-free flushing option.
- The air-pressure-assisted system supports flushing in low-pressure environments.
- The single 1.0-gallon flush setting reduces daily water use.
- Its non-electric design suits bathroom renovations without added wiring.
Possible Compromises
- Its fixed 1.0-gallon flush differs from the selectable liquid and solid volumes on earlier models.
- You still need to confirm that the listed dimensions work with your bathroom layout.
Core Details
Built With In Mind
This model makes sense for your renovation when a non-electric, touch-free flush is more valuable than separate flush-volume controls.
Consider Something Else When
The Casta Diva 17.5-Inch Elongated Toilet fits your priorities better when a taller seat and adjustable flush volumes lead the decision.
Silver gives this touch-free model a cooler, more restrained finish than the gold Casta Diva 17.2-Inch Gold One-Piece Toilet. You get the same air-pressure-assisted flush, built-in tank, foot-kick or side-button operation, and non-electric design in a finish suited to cool-toned bathroom hardware.
A 17.2-inch elongated comfort seat supports easier transitions, while the 1.0-gallon flush uses less water than the selectable 1.1-and-1.6-gallon system in the Casta Diva 17-Inch Elongated Toilet. The skirted vitreous china body has a soft-close lid and fits a standard 12-inch rough-in.
The Good Stuff
- Touch-free operation suits shared and accessible bathrooms.
- The silver accent coordinates readily with stainless hardware.
- Its 1.0-gallon flush supports lower water consumption.
Things That May Matter
- There is no second, larger flush option listed for solid waste.
- The 26.9-inch depth and 19.3-inch overall height require a room-clearance check.
- Your supply line and flange must suit the standard 12-inch rough-in.
Quick Facts
Who Should Grab It
You’ll appreciate this model when a silver finish, touch-free operation, and non-electric flushing suit your bathroom plan.
Reach For A Different Pick When
The Casta Diva 17.2-Inch Gold One-Piece Toilet serves you better when warm gold hardware is central to the design.
A 24.5-inch depth makes this the most compact option listed, which can matter in a narrow powder room where an elongated toilet crowds the doorway. Its round bowl is shorter than the elongated designs elsewhere in the roundup, but the one-piece body still presents a smooth surface with fewer tank-to-bowl gaps to clean.
You can select a 0.8-gallon flush for liquid waste or 1.28 gallons for solid waste. The lowest liquid-waste figure here supports water-conscious use, while the 16.25-inch seat height offers a raised position without reaching the 17.2- or 17.5-inch comfort heights of the elongated models.
Practical Pluses
- The 24.5-inch depth supports tight-room placement.
- Dual flush choices adapt to different waste loads.
- The quick-release seat helps with deep cleaning.
- The soft-close hinge reduces seat-slamming noise.
Where It Is Less Suited
- The round bowl provides less length than an elongated fixture.
- Its 16.25-inch seat is lower than every other comfort-height option listed.
- You’ll still need to verify wall clearance and the 12-inch rough-in position.
Whose Shelf It Belongs On
This toilet fits your project when a powder room’s limited depth matters more than elongated seating space.
Swap It Out When
The Casta Diva 17.5-Inch Elongated Toilet suits you better when a taller seat and longer bowl are worth the added floor depth.
Convenience drives this option, with a 17.2-inch ADA comfort-height seat, an elongated bowl, and flushing controls that you can operate with a foot-kick or side button. The touch-free approach makes sense for a shared bathroom where you want to limit contact with the flush control.
Its built-in air-pressure-assisted tank uses 1.0 gallon per flush and requires no electricity, which simplifies a renovation without electrical work. Unlike the Casta Diva 17.5-Inch Elongated Toilet, this model sits at a slightly lower comfort height, so your preferred sitting position remains the deciding factor.
What Earns Its Place
- Foot-kick and side-button controls support touch-free use.
- The 1.0-gallon flush setting keeps water consumption lower.
- Its non-electric operation suits straightforward renovations.
Honest Caveats
- The fixed 1.0-gallon flush removes the selectable volumes offered by several other models.
- Its elongated bowl needs enough clearance in a smaller bathroom.
Feature Facts
The Right Fit
This model suits your bathroom when touch-free operation and non-electric flushing matter more than adjustable flush volumes.
Not Your Match When
The Casta Diva 17.5-Inch Elongated Toilet offers a better fit when the extra half inch of seat height is your priority.
What Matters When Replacing a Toilet
Start With Room Clearance
Measure the available depth, width, and doorway path before focusing on finish. An elongated bowl can add several inches of projection, while the compact round model fits tight rooms more readily. You also need to account for the side clearance required to remove and clean the seat.
Match Seat Height To Your Routine
A 17-inch seat is a practical starting point for many adults, while 17.2 and 17.5 inches offer progressively higher positioning. Taller seats can make sitting and standing easier for some people, but you should compare the listed height with your current toilet rather than treating a higher number as automatically preferable.
Understand The Flush Controls
GPF stands for gallons per flush, so lower figures mean less water per activation. Dual-flush models give you a smaller liquid-waste setting and a larger solid-waste setting, while single-volume models keep the operating sequence simpler. Touch-free controls may also be useful in shared bathrooms.
Check The Installation Connection
Every model here uses a 12-inch rough-in, meaning the center of the floor flange should sit 12 inches from the finished wall. A one-piece body simplifies exterior cleaning, but the listed size, flange position, and bathroom doorway still need to align with your space.
Common Mistakes Worth Avoiding
Wrong Turns To Avoid
Do not choose an elongated bowl from appearance alone, because its extra length can crowd a compact bathroom. Check the rough-in location, supply-line position, and door swing before ordering, and measure the finished wall rather than the space behind an existing toilet.
What Separates Premium From Basic
Height, finish, flush controls, and water volume create the meaningful differences here. Paying for a gold or silver accent adds visual value, while a 17.5-inch seat or touch-free operation may carry more practical value for your particular bathroom.
Frequently Asked Questions
Can A Toilet Auger Replace A Complete Toilet?
No. A toilet auger clears obstructions inside the bowl, while these products replace the entire toilet. You may still need an auger as a maintenance tool even after installing one of these fixtures.
Which Seat Height Is Most Comfortable?
Comfort depends on your body proportions, current toilet, and mobility needs. The listed options range from 16.25 to 17.5 inches, with the Casta Diva 17.5-Inch Elongated Toilet offering the highest seat.
Do These Toilets Need Electrical Connections?
The air-pressure-assisted models operate without electricity, including the gold and silver 17.2-inch options. Their touch-free controls and flushing mechanism rely on the built-in tank rather than an electrical connection.
What Does A 12-Inch Rough-In Mean?
It means the center of the floor-mounted flange should measure 12 inches from the finished wall. Your existing flange location must match this dimension unless the surrounding plumbing is adjusted.
Which Model Fits The Smallest Bathroom?
The Casta Diva Compact 0.8/1.28 GPF Toilet has the shortest listed depth at 24.5 inches. Its round bowl makes it a more practical fit than the elongated options for many tight rooms.
Final Thoughts
The best fit comes down to three measurements: room depth, flange position, and comfortable seat height. Compact rooms favor the round toilet, elongated bathrooms offer more seating space, and the gold and silver models bring a distinct finish to the same practical one-piece format. Measure first, then let the flushing controls and water use narrow your decision.