A black one-piece toilet can give a bathroom a bold, modern look, while a skirted design can make the outside easier to wipe clean. The right choice depends on more than color: check the rough-in, bowl shape, seat height, dimensions, flush options, and what installation parts are included. These five models range from compact options for smaller rooms to elongated, comfort-height designs. Availability can change, so check each listing before you decide.
| Toilet | Finish | Bowl / Height | Flush | Notable detail |
|---|---|---|---|---|
| Swiss Madison Ivy One Piece Toilet | Glossy black | Elongated / standard height | Dual flush, 1.1/1.6 GPF | Skirted, fully glazed trapway |
| HOROW T0338WB Elongated Toilet | Matte black | Elongated / 17.3 inches or more to seat | Dual flush, 1.1/1.6 GPF | MAP 1000 flush rating listed |
| Casta Diva Elongated One Piece Toilet | Black | Elongated / 17-inch seat height | Dual flush, 1.1/1.6 GPF | Wax seal and installation hardware included |
| SOTOMO Black One Piece Toilet | Black | Elongated / 16.8-inch height listed | Dual flush, 1.1/1.6 GPF | Average 1.28 GPF listed |
| HOROW HWMT-8733BU Compact Toilet | Matte black | Round / 16.5-inch seat height | Dual flush, 1.1/1.6 GPF | 25-inch depth for smaller bathrooms |
Table of Contents
Our Picks: Best Black One Piece Toilet reviews
1. Swiss Madison Ivy: Glossy black with a streamlined skirted design
The Swiss Madison Ivy pairs a glossy black finish with an elongated bowl and a one-piece shape. Its skirted trapway hides the exterior plumbing, giving the toilet a cleaner outline and fewer visible curves to work around when wiping it down.
The dual-flush buttons offer a 1.1 GPF light flush and a 1.6 GPF full flush. The ceramic is described as non-porous and scratch-resistant, and the trapway is fully glazed. It uses a standard 12-inch rough-in and has access holes for installation.
Its standard-height seat may suit households that prefer a lower seat than the comfort-height options in this guide. The glossy finish also stands apart from the matte black models, though it may not match a bathroom plan built around a softer, low-sheen look.
The supplied availability information marks this model as unavailable. Check the listing to see whether that has changed. The product details provided also do not specify whether a seat or installation hardware is included, so confirm the package contents before ordering.
Pros:
- Glossy black finish and elongated bowl
- Two flush options at 1.1 and 1.6 GPF
- Skirted exterior and fully glazed trapway
- Standard 12-inch rough-in
Cons:
- Availability is marked as unavailable in the supplied product information
- Seat and installation-part details are not specified
Verdict: Consider the Ivy if you want a glossy finish and a standard-height elongated toilet, but verify availability and included parts before making plans around it.
2. HOROW T0338WB: Matte black comfort height with a powerful flush rating
The HOROW T0338WB is an elongated, one-piece toilet with a matte black finish and a listed seat height of 17.3 inches or more from the floor. That higher position can be a helpful feature if you find lower toilets harder to sit on or stand up from. The listed dimensions are 26.6 inches deep, 15 inches wide, and 26 inches high.
It has a dual-flush system with 1.1 and 1.6 GPF options. HOROW also lists a MAP 1000 flush test result, a fully glazed 2-inch trapway, and WaterSense certification. These are useful specifications to compare, but actual fit and flushing depend on correct installation and household use.
The fully skirted sides give the toilet a simpler exterior to clean. A soft-close seat is included, and the listing says the seat can be removed for tightening or cleaning. Two side openings are provided for installation, while the supply line is sold separately.
Compared with the compact HOROW model below, this toilet has an elongated bowl and a higher listed seat, but it needs more front-to-back room. Measure your bathroom and check the rough-in before ordering; this model uses a standard 12-inch rough-in.
Pros:
- Elongated bowl and comfort-height seat specification
- Dual flush with 1.1 and 1.6 GPF options
- MAP 1000 test result and WaterSense certification listed
- Soft-close seat and skirted exterior
Cons:
- Supply line is sold separately
- Its elongated shape requires more depth than the compact HOROW model
Verdict: The T0338WB is a strong fit if you want a matte black elongated toilet with a higher seat and clearly listed flush specifications, and your bathroom has room for its dimensions.
3. Casta Diva: Comfort-height design with installation parts included
The Casta Diva is an elongated, skirted one-piece toilet with a listed 17-inch seat height. Its dimensions are about 27.17 inches deep, 14.37 inches wide, and 25.39 inches high. The integrated tank and bowl create a continuous profile without a separate tank-to-bowl joint.
Its dual-flush system offers 1.1 GPF for liquids and 1.6 GPF for solids. The product details also list a MAP rating of 1000 and a fully glazed trapway. A slow-close seat is included, along with the wax seal and hardware needed for installation, which makes the package information more complete than some of the other listings here.
The standard 12-inch rough-in and side installation holes are worth checking against your existing setup. The listing says the toilet meets cUPC standards and includes a one-year limited customer-service period and lifetime technical consulting. Those support terms are specific to the seller’s listing, so review their details before purchase.
At just over 27 inches deep, it is not the shortest option in this group. If floor space is tight, the 25-inch-deep HOROW compact model may be a better match, though that model has a round bowl rather than an elongated one.
Pros:
- 17-inch seat height and elongated bowl
- Dual flush with 1.1 and 1.6 GPF options
- Wax seal, seat, and installation hardware included
- Skirted one-piece design with fully glazed trapway
Cons:
- Requires more depth than the compact option
- Confirm the listed rough-in and package contents for your installation
Verdict: Choose the Casta Diva if you want an elongated comfort-height toilet and value a listing that specifies the seat, wax seal, and installation hardware in the package.
4. SOTOMO: Elongated bowl with dual flush and a 1.28 GPF average listed
The SOTOMO is a black, one-piece toilet with an elongated bowl. Its listed dimensions are 28.4 inches deep, 15.5 inches wide, and 26.6 inches high. The product description gives a seat height of 16.8 inches and an elongated seat length of 18.43 inches, so compare those measurements with your comfort needs and available space.
The dual-flush system is listed at 1.1 and 1.6 GPF, with an average use of 1.28 GPF. SOTOMO describes its flush as a rimless tornado swirl and lists a MAP rating of 1000 grams. Its fully glazed trapway and skirted exterior are intended to make cleaning easier.
The package is described as including a soft-close seat, pre-installed flush valve, wax ring, floor bolts, and installation instructions. The listing recommends two people for lifting. Its depth is greater than the compact HOROW model and slightly greater than the Casta Diva, so take a careful measurement from the wall to the front of the bowl.
The supplied availability information marks this model as unavailable. Check the Amazon listing for its current status before planning a purchase.
Pros:
- Elongated bowl and soft-close seat
- Dual-flush options and 1.28 GPF average listed
- MAP 1000-gram rating and fully glazed trapway listed
- Wax ring, floor bolts, and instructions included according to the listing
Cons:
- Availability is marked as unavailable in the supplied product information
- Its 28.4-inch depth may not suit a tight bathroom
Verdict: The SOTOMO’s specifications make it worth comparing if you want an elongated dual-flush model, but confirm availability and measure carefully before choosing it.
5. HOROW HWMT-8733BU: Compact matte black option for smaller bathrooms
The HOROW HWMT-8733BU is the space-saving choice in this group. It measures 25 inches deep, 13.4 inches wide, and 28.4 inches high. Its round bowl and compact tank shape help reduce its front-to-back footprint, making it a model to consider for an apartment, ensuite, or other bathroom where space is limited.
The seat height is listed at 16.5 inches. The dual-flush system provides a 1.1 GPF light flush and a 1.6 GPF full flush, with an average of 1.28 GPF listed. The toilet also has a skirted trapway, a soft-close seat, and a quick-release feature for removing the seat.
The round bowl is the key trade-off: it saves room but does not offer the same elongated shape as the other toilets in this guide. Its matte finish has a different look from the glossy Swiss Madison model, and the package description lists a wax ring, floor bolts, and installation instructions. The listing specifies a 12-inch rough-in.
Pros:
- 25-inch depth is well suited to tighter spaces
- Matte black finish and skirted exterior
- Dual-flush options with 1.28 GPF average listed
- Soft-close, quick-release seat
Cons:
- Round bowl is less elongated than the other models in this guide
- Confirm that the 12-inch rough-in matches your bathroom
Verdict: If saving floor space matters more than having an elongated bowl, this compact HOROW is the most space-conscious option among these picks.
How to Choose a Black One-Piece Toilet
Measure the rough-in before ordering
The rough-in is the distance from the finished wall behind the toilet to the center of the floor drain or mounting bolts. The models in this guide list a standard 12-inch rough-in, but measure your existing setup rather than assuming it matches. Also check the toilet’s full depth and width so the bowl, door, and nearby fixtures have enough clearance.
Pick the bowl shape for your room and comfort
An elongated bowl can provide more room in front, while a round bowl can help conserve floor space. The HOROW HWMT-8733BU is the compact round-bowl option here; the other listed models have elongated bowls. Consider who will use the bathroom and how much room you have before choosing between the two shapes.
Compare seat height, not just overall toilet height
Seat height affects how easy it feels to sit down and stand up. The listings range from standard height on the Swiss Madison Ivy to about 17 inches on the Casta Diva and 17.3 inches or more from floor to seat on the HOROW T0338WB. Check whether a measurement refers to the seat or the toilet itself, since product dimensions may describe different points.
Understand the dual-flush numbers
Several models offer a 1.1 GPF light flush and a 1.6 GPF full flush. Those figures describe the options for each flush, while some listings also provide an average use figure. Compare the flush details alongside the manufacturer’s stated performance information, and avoid treating a test rating as a guarantee of performance in every home.
Choose a finish that fits your bathroom
Glossy black has a more reflective look, while matte black has a softer, less shiny appearance. The Swiss Madison Ivy is listed as glossy black; both HOROW models are listed as matte black. Product photos can help you compare the look, but check the finish name and any available listing details to make sure it matches your other fixtures.
Check cleaning features and package contents
A skirted exterior hides the trapway shape and can reduce hard-to-reach outer areas. A glazed trapway is also listed on several models. Before ordering, check whether the toilet includes a seat, wax seal, bolts, and other installation parts. The listings differ: for example, the HOROW T0338WB says the supply line is sold separately, while the Casta Diva listing names a wax seal and installation hardware as included.
Plan for installation and lifting
One-piece toilets combine the tank and bowl, so check the manufacturer’s installation instructions and arrange help for moving the unit. The SOTOMO listing recommends two people for lifting. If you are not sure about the rough-in, floor bolts, or supply connection, consult a plumber before ordering or starting installation.
Frequently Asked Questions
Are black toilets harder to keep clean?
Color alone does not determine how easy a toilet is to clean. A skirted exterior can make the outside simpler to wipe, and a smooth glazed surface can help with routine cleaning. Dark finishes may make some water marks or mineral deposits easier to notice, so regular care and the right cleaning products matter.
What does a one-piece toilet mean?
A one-piece toilet has the tank and bowl joined into one unit rather than assembled as separate pieces. Several models here also have a skirted exterior, which gives the sides a more continuous appearance and fewer exposed contours to wipe around.
Is an elongated bowl better than a round bowl?
Neither shape is right for every bathroom. An elongated bowl offers a longer seating area, while a round bowl can save space. Measure your room and consider how the toilet will feel for the people who use it most.
What does a 12-inch rough-in mean?
A 12-inch rough-in generally refers to the distance from the finished wall to the center of the toilet drain or mounting bolts. Measure your bathroom carefully and follow the product’s installation instructions. A mismatch can prevent the toilet from fitting correctly.
Do these toilets include a seat?
The product details say that the HOROW T0338WB, Casta Diva, SOTOMO, and HOROW HWMT-8733BU include a seat. The supplied information for the Swiss Madison Ivy does not specify whether a seat is included, so check its listing before ordering.
Which black one-piece toilet is best for a small bathroom?
The HOROW HWMT-8733BU has the shortest listed depth at 25 inches and a round bowl, making it the most compact option in this group. Measure your available space and confirm the rough-in before buying.
Are the models in this guide currently available?
Availability can change. The supplied product information marks the Swiss Madison Ivy and SOTOMO as unavailable, while the other three are marked available. Check the product listing for the latest status and package details.
Final Recommendation
For most shoppers who want an elongated matte black toilet with a higher seat and clearly stated flush specifications, the HOROW T0338WB is the most balanced pick in this group. Choose the HOROW HWMT-8733BU instead if bathroom space is tight and a round bowl works for you. The Casta Diva is another good option if you want a 17-inch seat height and installation parts listed in the package. Before you buy, confirm the rough-in, dimensions, finish, included parts, and current availability.
