A dual flush toilet gives two flush options: a smaller volume for liquid waste and a larger one for solid waste. The idea is to use less water on most flushes, and the figures for that come from the makers.
The six one-piece toilets below list two flush volumes each. Sizes and flush figures come from each product’s listing page. We have not used these toilets ourselves, and all water-saving and certification claims are the makers’ own.
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What to Look For
| Feature | Why it matters |
|---|---|
| Flush volumes | Two gallon-per-flush settings, listed per model |
| Bowl shape | Elongated, round or other; check against your space |
| Rough-in | All six list 12 inch rough-in |
| Depth | Ranges from 25 to 28.75 inches here |
| Seat | Soft-close seats are listed on every model |
Specs at a Glance
| Toilet | Listed size (D x W x H) | Flush (GPF) | Notes |
|---|---|---|---|
| HOROW HR-ST076WD | 28.75 x 14 x 28 in; 101 lb | 1.1 / 1.6 | Elongated; skirted; MaP 800 g |
| Bolina W2111D | Not listed | 0.8 / 1.28 | V-shape elongated; MaP 1000 g; UF seat |
| SOTOMO K-0318DF | 27.75 x 15.4 x 27.13 in | 1.1 / 1.6 | Elongated; MaP 1000 g; quick-release seat |
| Lordear MLT002 | 27.19 x 14.56 x 30.69 in | 1.24 / 1.6 | Skirted; comfort height |
| Sarlai S-MT05 | 26.37 x 14.37 x 28.75 in | 1.1 / 1.6 | MaP 1000; quick-release PP seat |
| HOROW HWMT-8733 | 25 x 13.4 x 28.4 in; 90 lb | 1.1 / 1.6 | Round bowl; 16.5 in seat; 2-year warranty |
The 6 Best Dual Flush Toilets
1. HOROW HR-ST076WD
A 28.75 by 14 by 28 inch, 101 pound elongated one-piece toilet with a 1.1 or 1.6 gallon dual flush the maker averages at 1.28, an 800 gram MaP score, a skirted trapway and a soft-close seat with stainless steel hinges for 12 inch rough-in.
Suits: a skirted elongated look. Strengths: a narrow 14 inch width and a removable seat. Weaknesses: a 28.75 inch depth. Skip it if the room is tight front to back.
View HOROW HR-ST076WD Compact Elongated Dual Flush Toilet on Amazon
2. Bolina W2111D
A one-piece toilet with a V-shape elongated bowl, a 0.8 or 1.28 gallon dual flush, a 1000 gram MaP figure, a Tornado Flush, a soft-close UF seat and 12 inch rough-in. The maker says it is WaterSense and EPA certified and uses 20 percent less water than older toilets.
Suits: the lowest listed flush volumes. Strengths: 0.8 gallon light flush. Weaknesses: the listing gives no dimensions. Skip it if you must check size before ordering.
View Bolina W2111D One-Piece Dual Flush Toilet on Amazon
3. SOTOMO K-0318DF
A 27.75 by 15.4 by 27.13 inch ceramic one-piece toilet with an 18.75 inch elongated seat, a 1.1 or 1.6 gallon dual flush, a 1000 gram MaP score, a fully glazed 2 inch trapway and a soft-close quick-release seat for 12 inch rough-in.
Suits: a compact elongated bowl. Strengths: a quick-release seat and a listed trapway size. Weaknesses: weight is listed as 49.44 kg, so check shipping weight. Skip it if you need a lb figure.
View SOTOMO K-0318DF Elongated Dual Flush Toilet on Amazon
4. Lordear MLT002
A 27.19 by 14.56 by 30.69 inch floor-mounted toilet with a siphonic vortex flush, a 1.24 or 1.6 gallon dual flush, a skirted design and 12 inch rough-in. The title says 16.5 inch comfort height and an elongated bowl, while a bullet says 16 inches and the shape field says U-Shape.
Suits: a skirted look. Strengths: a narrow 14.56 inch width. Weaknesses: conflicting height and shape details. Skip it if seat height matters to you.
View Lordear MLT002 One-Piece Dual Flush Toilet on Amazon
5. Sarlai S-MT05
A 26.37 by 14.37 by 28.75 inch ceramic one-piece toilet with a 1.1 or 1.6 gallon dual flush, a 1000 MaP score, a fully glazed trapway, a soft-close quick-release polypropylene seat and 12 inch rough-in. The title says both comfort height and standard height, and the shape field says D-Shape.
Suits: a mid-depth toilet. Strengths: a 26.37 inch depth and a quick-release seat. Weaknesses: unclear height wording. Skip it if you need a clear seat height.
View Sarlai S-MT05 One-Piece Dual Flush Toilet on Amazon
6. HOROW HWMT-8733
A small 25 by 13.4 by 28.4 inch, 90 pound ceramic toilet with a round bowl, a 16.5 inch seat, a siphon flush of 1.1 or 1.6 gallons, a soft-close seat and 12 inch rough-in. The listing shows a two-year limited warranty.
Suits: a small room. Strengths: the shortest depth here and the lightest weight. Weaknesses: a round bowl, not elongated. Skip it if you want an elongated bowl.
View HOROW HWMT-8733 Compact Round Dual Flush Toilet on Amazon
Before You Install
- Measure the rough-in from the wall to the drain center.
- Check the depth against the door and vanity.
- Look at what the box includes, such as the seat and wax ring.
- Plan for help lifting a toilet near 100 pounds.
Mistakes to Avoid
- Assuming the water savings are guaranteed; they are the makers’ figures.
- Skipping the rough-in measurement.
- Ignoring conflicting listing details.
- Choosing a round bowl without meaning to.
Dual Flush Toilet FAQ
How do the two flushes work?
One option uses less water and the other uses more, listed here as gallons per flush.
Are the savings guaranteed?
No. The listings present the figures as the makers’ claims.
The Short Version
For an elongated skirted look, the HOROW ST076WD. For the lowest flush volumes, the Bolina. For a compact elongated bowl, the SOTOMO. For a narrow skirted unit, the Lordear. For a mid-depth option, the Sarlai. For a small round bowl, the HOROW 8733.
