A slow tank refill or weak flush often points to a larger bathroom decision than a loose toilet filler valve. The eight options below are complete one-piece toilets with pre-installed fill and flush valves, so your comparison should cover water use, bowl height, footprint, flushing design, and installation requirements together.
A toilet filler valve controls water entering the tank, while the flush valve releases water into the bowl. Homeowners replacing an entire toilet need to check the rough-in, clearance, comfort height, and available water use before choosing one of these integrated systems.
Your Options, Compared
CASTA DIVA Elongated One-Piece Toilet
CASTA DIVA One-Piece Toilet, Gold
CASTA DIVA 17.5-Inch Comfort Toilet
CASTA DIVA 17.2-Inch Comfort Toilet
CASTA DIVA 17.5-Inch Gold Toilet
CASTA DIVA 17.2-Inch Gold Toilet
CASTA DIVA 17.2-Inch Silver Toilet
CASTA DIVA Compact One-Piece Toilet
What Each Pick Brings To The Table
A one-piece silhouette gives you a tank, bowl, and integrated fill valve without the visible junction found on a conventional two-piece toilet. This CASTA DIVA model combines a skirted body with a 1000 MAP rating, a scale that indicates flush performance, and a fully glazed trapway designed to support smooth waste movement.
For a full bathroom replacement, the 17-inch seat and dual-flush choices provide a practical middle ground. The toilet measures 27.17 inches deep by 14.37 inches wide and 25.39 inches high, so you need adequate clearance from the finished wall.
Good Reasons To Consider
- The seamless one-piece body leaves fewer exterior seams to wipe around.
- Dual flush settings use 1.1 gallons for liquids and 1.6 gallons for solids.
- The soft-close, quick-release seat lowers noise and simplifies removal for cleaning.
- The pre-installed fill and flush valve simplifies the assembled replacement.
- A 17-inch seat offers a middle-height option for many households.
Practical Considerations
- Its 27.17-inch depth requires more space than a compact round-bowl toilet.
- The 12-inch rough-in and floor-bolt layout must match your existing plumbing.
Key Specs
Made For
This model suits homeowners replacing a full toilet who want a mid-height seat, selectable flush volumes, and a streamlined one-piece design.
Consider Something Else When
Choose the CASTA DIVA 17.5-Inch Comfort Toilet instead when a taller seat and lower solid-flush volume are your priorities.
The gold button gives the CASTA DIVA One-Piece Toilet, Gold a stronger decorative accent than the plain white approach of the first model. Beneath the finish, you retain the same 17-inch seat height, 12-inch rough-in, 1000 MAP rating, and 1.1/1.6-gallon dual-flush arrangement.
This suits a bathroom renovation where the toilet needs to coordinate with warm metal hardware rather than disappear into the wall. The skirted ceramic body still gives you a continuous profile that is straightforward to wipe down.
The Helpful Details
- The gold flush button adds a deliberate accent to the coordinated one-piece design.
- Its 17-inch seat closely follows the CASTA DIVA Elongated One-Piece Toilet’s practical mid-height format.
- The quick-release soft-close seat supports quiet use and easier cleaning.
Worth Noting
- The gold detail may feel conspicuous beside predominantly white or cool-toned fixtures.
- A 17-inch seat sits lower than the 17.5-inch comfort-height alternatives.
- The elongated bowl requires a 27.17-inch-deep installation area.
Right Fit For
This toilet fits homeowners who prioritize a coordinated gold accent while retaining a conventional 17-inch comfort height and dual-flush operation.
Where A Sibling Pick Shines
The CASTA DIVA 17.5-Inch Gold Toilet offers the same metallic direction with a taller seat for greater standing clearance.
The 17.5-inch seat is the practical change from the two earlier CASTA DIVA models, giving you a little more clearance when sitting down or standing up. Its elongated bowl and compact 14.56-inch width remain suited to bathrooms with enough depth for a modern one-piece toilet.
You also move to 1.0-gallon liquid and 1.28-gallon solid flush settings, which use less water than the 1.1/1.6-gallon arrangement in the CASTA DIVA Elongated One-Piece Toilet. The 1000 MAP flush rating remains the same.
Benefits That Matter
- The 17.5-inch comfort height supports a more upright sitting and standing position.
- A 1.0-gallon liquid flush offers a lower daily water option.
- The 1.28-gallon solid setting balances water reduction with flush capacity.
- The fully glazed trapway supports waste flow through the siphon-jet design.
- Quick-release hinges let you remove the soft-close seat for cleaning.
Points To Note
- Its 25.39-inch depth still needs adequate space between the wall and the front of the bowl.
Technical Highlights
Built With In Mind
This model best serves adults who benefit from a taller seat and households seeking lower water use without giving up a dual-flush layout.
Look Elsewhere When
The CASTA DIVA Compact One-Piece Toilet fits better when bathroom depth is more restrictive than seat height.
The CASTA DIVA 17.5-Inch Gold Toilet is essentially the decorative counterpart to the preceding comfort-height model. It keeps the same 17.5-inch seat, elongated bowl, 1.0/1.28-gallon dual flush, 1000 MAP rating, and 12-inch rough-in.
That close functional match makes the choice mostly visual. You may prefer the gold presentation in a powder room or coordinated renovation, while the white option remains easier to blend into a mixed-fixture bathroom.
Real Benefits
- The gold button brings a decorative focal point to an otherwise streamlined toilet.
- The taller seat provides easier transitions for adults who benefit from added clearance.
- Two selectable flush volumes let you match water use to the type of waste.
Less Ideal Details
- The finish does not add a functional advantage over the white comfort-height model.
- The 25.39-inch depth calls for adequate clearance in a narrow bathroom.
- Your existing floor-bolt spacing needs to match the 12-inch rough-in.
Who It Suits Best
This toilet suits a design-focused homeowner who wants both a 17.5-inch seat and a gold accent that coordinates with the bathroom’s metalwork.
Reach For A Different Pick When
Choose the CASTA DIVA 17.5-Inch Comfort Toilet when you prefer the same functional specifications with a more neutral white appearance.
This model changes the flushing approach rather than simply adding a finish. Its built-in tank uses an air-pressure-assisted system designed to support flushing in low-pressure environments, and you can activate it with a foot-kick or side button without electricity.
At 17.2 inches, the seat sits below the 17.5-inch comfort models, but the 1.0-gallon use is lower than their 1.28-gallon solid-flush setting. For you, the trade-off is fewer volume choices in exchange for a simpler, hands-free flushing format.
Where It Helps
- Foot-kick or side-button operation supports hands-free flushing.
- The non-electric design suits renovations without a nearby electrical outlet.
- Air-pressure assistance is intended for better performance in low-pressure setups.
- The 1.0-gallon flush keeps water use below the earlier dual-flush models.
- The 17.2-inch seat provides a taller sitting position than a standard-height toilet.
Potential Compromises
- You lose the separate higher-volume solid-flush option offered by the dual-flush models.
- Check that your preferred foot-kick or side-button control suits the final room layout.
Feature Snapshot
Made For
This toilet suits homeowners renovating without electrical hookups who value low-volume flushing and hands-free activation in a gold-finished design.
Another Choice May Suit
The CASTA DIVA 17.5-Inch Comfort Toilet is the better fit when separate liquid and solid flush volumes matter more than a 1.0-gallon-only format.
The silver version shares the practical core of the preceding gold model, including a built-in tank, air-pressure-assisted 1.0-gallon flush, foot-kick or side-button activation, and a 17.2-inch comfort-height seat. The cooler finish is easier to coordinate with stainless hardware, black accents, or contemporary gray tile.
You still get the non-electric design and 1000 MAP rating without relying on a wall outlet. Compared with the earlier comfort-height choices, the main difference is the simpler flush format rather than the seat height.
Positive Points
- The brushed silver finish suits modern bathrooms better than a traditional gold accent.
- Hands-free activation works through either a foot-kick or side button.
- The 1.0-gallon design reduces water use without an electrical connection.
Small Caveats
- There is no separate higher-volume solid-flush setting.
- The 17.2-inch seat is slightly lower than the 17.5-inch alternatives.
- The elongated profile measures 26.9 inches deep, so clearance needs checking.
Core Details
The Right Fit
This model fits homeowners who want a modern silver fixture, hands-free flushing, and a non-electric installation in a raised-height toilet.
Swap It Out When
The CASTA DIVA 17.5-Inch Gold Toilet is the better option when a gold finish and a slightly taller seat matter more than flush-volume selection.
At 24.5 inches deep, the CASTA DIVA Compact One-Piece Toilet is the clear response to a bathroom that cannot accommodate the elongated models in this roundup. Its round bowl reduces the front-to-back footprint while retaining a 1000 MAP siphon-jet flush and selectable 0.8/1.28-gallon operation.
The 16.25-inch seat is lower than the 17.2- and 17.5-inch comfort-height choices, so space savings come with a less elevated sitting position. It still offers a quick-release, soft-close seat and a skirted one-piece body for straightforward cleaning.
What Earns Its Place
- The 24.5-inch depth fits tight bathrooms better than every elongated option here.
- A 0.8-gallon liquid flush gives you the lowest listed volume in the group.
- The 1.28-gallon solid setting provides a larger flush for denser waste.
- The removable soft-close seat supports quiet use and convenient cleaning.
Possible Drawbacks
- The 16.25-inch seat offers less standing clearance than the comfort-height models.
- The round bowl sacrifices the added room offered by an elongated seat.
Who Should Grab It
This toilet suits a small-space remodel where preserving floor and clearance space matters more than achieving the tallest comfort height.
A Better Fit Elsewhere
The CASTA DIVA 17.2-Inch Silver Toilet fits you better when you have enough depth and prefer a more elevated seat with silver detailing.
The CASTA DIVA 17.2-Inch Comfort Toilet pairs an elongated bowl with the air-pressure-assisted 1.0-gallon flushing approach seen in the gold and silver models. Foot-kick or side-button activation keeps the toilet hands-free and non-electric, which can be useful in a bathroom renovation without added wiring.
You also receive access to 24/7 support and a protection plan covering certain accidental damage, spills, broken parts, and breakdowns, depending on the plan terms. That support is a meaningful difference from a basic fixture, though the coverage should be reviewed carefully.
What It Does Well
- Hands-free foot-kick or side-button control supports convenient flushing.
- The 1.0-gallon design uses less water than the multi-volume flush models.
- Access to round-the-clock support adds assistance beyond the physical fixture.
Details To Watch
- Protection-plan limits vary, so you need to review exclusions and terms before deciding.
- The single 1.0-gallon format does not offer a separate larger solid-flush setting.
Key Product Details
Whose Shelf It Belongs On
This model fits a homeowner who values a non-electric 17.2-inch toilet and wants support and damage-protection options alongside the fixture.
Where Another Pick Suits Better
The CASTA DIVA 17.5-Inch Comfort Toilet suits you better when a taller seat and selectable flush volumes matter more than the added support plan.
What To Check Before Replacing A Toilet Filler Valve
Measure The Rough-In And Clearance
The rough-in is the distance from the finished wall to the center of the toilet’s floor bolts, and all eight picks use a 12-inch layout. Measure the available depth too, because the compact round model is 24.5 inches deep while several elongated options extend to roughly 27 inches.
Match The Seat Height
Your options range from a 16.25-inch compact seat to 17.5-inch comfort-height models. A higher seat can make sitting and standing more comfortable for taller adults or anyone with limited mobility, but the added height should still suit your household and bathroom proportions.
Compare Fill And Flush Design
GPF means gallons per flush, so lower numbers indicate less water for each operation. MAP is a flush-performance rating based on a defined waste load, and the listed toilets all carry a 1000 MAP rating despite their different water volumes.
Review The Installation Kit
Each listing includes key components such as a wax ring, mounting hardware, and pre-installed fill or flush components. You still need to confirm the flange, floor-bolt spacing, water connection, and local installation requirements before ordering.
Smart Details That Separate These Toilets
Common Shopping Slip Ups
A compact bowl does not automatically mean a smaller seat height, and an elongated bowl needs more front clearance than a round one. Measure the finished room rather than relying on the toilet’s width alone. Also check the flush-control style, since foot-kick and side-button arrangements affect daily use.
What Separates Premium From Basic
Air-pressure assistance, hands-free activation, decorative finishes, and support plans separate the more specialized models. A higher level may suit you when low-pressure flushing, coordinated finishes, or added assistance justify the extra features. Your simplest bathroom may need only a compact footprint, selectable water use, and a standard 12-inch rough-in.
Frequently Asked Questions
What is a toilet filler valve?
A toilet filler valve controls the flow of water into the tank after a flush. It works with the flush valve, which releases tank water into the bowl.
Are these standalone toilet filler valves?
No, these are complete one-piece toilets with pre-installed fill and flush valves. They are intended as full fixture replacements rather than loose valves for an existing two-piece toilet.
Which seat height is easiest to use?
A 17.5-inch comfort-height seat offers the most elevated position among these options, while 17.2 inches provides a similar middle-height format. The 16.25-inch compact model prioritizes space savings over maximum standing clearance.
Can a one-piece toilet replace a standard toilet?
Usually, the existing 12-inch rough-in and floor-bolt spacing determine compatibility. You also need enough clearance for the bowl and supply connection, and any unusual plumbing arrangement may require a different fixture.
How much water do these toilets use?
The listed liquid-flush volumes range from 0.8 to 1.1 gallons per flush, while solid-flush settings range from 1.28 to 1.6 gallons. The 1.0-gallon air-assisted models use one volume for every flush.