The best one-piece toilet depends on your bathroom size, preferred seat height, and flushing needs. For a compact bathroom, consider the DeerValley compact round-bowl model or HOROW T0338W. For an elongated bowl and taller seating, the DeerValley DV-1F0437 offers a listed 17½-inch seat height. The Casta Diva models pair one-piece construction with comfort-height seating, while offering different dimensions and flush details.
| Toilet | Best For | Notable Feature |
|---|---|---|
| DeerValley Compact | Very small bathrooms | Compact round bowl and dual flush |
| DeerValley DV-1F0437 | Elongated-bowl comfort | 17½-inch seat height |
| HOROW T0338W | Compact elongated design | 17.3-inch seat height |
| Casta Diva Gold | Comfort height and distinctive style | 17.5-inch seat height |
| Casta Diva 17-inch | Water-conscious flushing | Dual-flush options |
DeerValley Compact One-Piece Toilet
This DeerValley toilet is best for a small bathroom where floor space is limited. Its listed dimensions are 24½ inches long, 13⅜ inches wide, and 28⅜ inches high. It has a standard round bowl and a one-piece, skirted design intended to reduce hard-to-reach exterior crevices.
The dual-flush system uses 1.1 or 1.6 gallons per flush, according to the product details. Choose this model if compact dimensions and two flush options are priorities. A limitation is that the round bowl may not suit buyers specifically seeking an elongated bowl. Check the listed measurements against your available space before choosing.
DeerValley Elongated Comfort-Height Toilet
Choose the DeerValley DV-1F0437 if you want an elongated bowl and a higher seat. The product information lists a 17½-inch seat height, which may make sitting down and standing up easier for some users. Its one-piece body has a rimless bowl and a compact elongated profile measuring 26.77 inches deep by 14.5 inches wide.
It offers a dual flush of 1 or 1.28 gallons per flush. The product listing also reports a 1000g MaP score and describes dual nozzles. This model is best for buyers prioritizing an elongated bowl, taller seating, and lower-volume flush options. Confirm bathroom clearances and installation requirements before purchase; the provided details do not specify a rough-in measurement.
HOROW T0338W Compact One-Piece Toilet
The HOROW T0338W is best for shoppers who want a compact elongated toilet with chair-height seating. It measures 26.6 inches deep, 15 inches wide, and 26 inches high. The listed seat height is 17.3 inches, and the one-piece exterior is designed to be easier to wipe down than a design with a separate tank and bowl.
Its dual-flush system offers 1.1- and 1.6-gallon options. The product details also describe siphon flushing and a fully glazed 2-inch trapway. Choose this model if you want an elongated bowl in a relatively compact footprint. Its listed depth is greater than the DeerValley compact round-bowl option, so measure the space available in front of the toilet.
Casta Diva Gold One-Piece Toilet
This Casta Diva model is best for buyers looking for an elongated bowl and a 17.5-inch comfort-height seat. The listing describes a skirted one-piece design with a gold-colored flush button. Its dimensions are 25.39 inches deep, 14.56 inches wide, and 26.57 inches high.
The toilet uses a siphon-jet flush, with a fully glazed trapway and a listed 1000g MaP flush score. The product details describe it as ADA compliant; check applicable requirements for your specific installation rather than relying on seat height alone. Choose this model if its stated dimensions, taller seat, and distinctive button suit your bathroom. The gold button may not match every fixture style.
Casta Diva 17-Inch Comfort-Height Toilet
Choose this Casta Diva elongated one-piece toilet if you want a skirted exterior, a 17-inch comfort-height seat, and dual-flush choices. The product details list 1.1 gallons per flush for liquids and 1.6 gallons for solids. They also describe a siphon flush, a fully glazed trapway, and a 1000g MaP rating.
The seamless one-piece construction is intended to simplify exterior cleaning by reducing the joint between tank and bowl. This model is best for buyers who value dual-flush options and a streamlined design. The provided features do not include dimensions or a rough-in measurement, so confirm those specifications before ordering.
Buying Guide: How To Choose A One-Piece Toilet
Which bowl shape fits your bathroom?
Round bowls can be useful where space is tight, while elongated bowls provide a longer seating area. Compare the product’s dimensions with your bathroom layout, including the space in front of the bowl and the room around the sides. Do not assume that all compact toilets have the same footprint.
What seat height should you consider?
A taller, chair-height seat may make sitting and standing easier for some adults. The products here list seat heights from 17 to 17½ inches for several models. Check how the manufacturer defines the measurement and consider who will use the toilet. A taller seat is not automatically the right fit for every household.
How should you compare flushing options?
Dual-flush toilets provide different flush volumes for different uses. Compare the listed gallons per flush, trapway details, and any reported flush-performance information. These specifications describe different aspects of a toilet and should not be treated as interchangeable.
What should you measure before ordering?
Measure the available floor area and check the toilet’s overall width, depth, and height. Also verify the rough-in requirement, water connection, and installation details using the product documentation. Those details are not provided for every model in this comparison.
Why choose a one-piece design?
A one-piece toilet integrates the tank and bowl into one unit. Several listings also describe skirted exteriors, which can make the outside easier to wipe. Compare the full toilet dimensions and cleaning access rather than choosing by appearance alone.
Frequently Asked Questions
Is a one-piece toilet the same as a one-piece toilet seat?
No. A one-piece toilet has an integrated tank and bowl. A toilet seat is a separate component attached to the bowl. The products in this guide are complete toilets, not replacement seats.
Which option is designed for a small bathroom?
The DeerValley compact model has listed dimensions of 24½ by 13⅜ by 28⅜ inches and a standard round bowl. The HOROW T0338W is another compact option, but it has an elongated bowl and measures 26.6 inches deep.
Which models have dual-flush systems?
All five models in this comparison list dual-flush options. Their flush volumes differ, so compare each product’s specifications before choosing.
Does a higher seat guarantee accessibility?
No. Seat height is one consideration, but accessibility depends on the installation and the user’s needs. Review the full product specifications and applicable requirements for your bathroom.
Do all these toilets have the same rough-in?
The supplied product details do not state a rough-in measurement for every model. Verify the required rough-in with the manufacturer’s installation information before purchase.