The best one-piece dual-flush toilet depends on your bathroom size, preferred seat height, and water-use priorities. The Bolina W2121D is a strong fit for shoppers seeking low flush volumes and listed efficiency certifications, while the DeerValley is designed for compact bathrooms. Lordear offers a 17-inch comfort-height seat and two flush settings. The Sarlai and EPLO models are worth comparing for their listed comfort or smart features, but their provided product details do not confirm a dual-flush function.
| Product | Best For | Key Detail |
|---|---|---|
| Bolina W2121D | Water efficiency | 0.8/1.28 GPF dual flush |
| DeerValley Compact | Small bathrooms | 24.6-inch projection |
| Lordear | Comfort height | 17-inch seat height; 1.1/1.6 GPF |
| Sarlai | Soft-close seating | Comfort-height design; dual flush not confirmed |
| EPLO E18 | Hands-free features | Foot sensors and foam shield; dual flush not confirmed |
Bolina W2121D Dual-Flush Toilet
The Bolina W2121D is best for buyers prioritizing low water use in a one-piece toilet. Its dual-flush system uses 0.8 gallons per flush (GPF) for liquid waste and 1.28 GPF for solid waste. The product listing also identifies EPA, WaterSense, and DOE/CEC certifications and a MAP rating of 1000g.
The elongated D-shape bowl is described as providing extra seating space, and the toilet has a 12-inch rough-in and soft-close seat. Choose this model if its flush volumes and modern bowl shape match your needs. The provided features do not state the seat height or overall dimensions, so verify fit before purchasing.
DeerValley Compact Dual-Flush Toilet
The DeerValley is best for small bathrooms where reducing the toilet’s front-to-back footprint matters. The listing gives a projection of 24.6 inches from the wall and a standard round bowl. Its dual-flush settings are 0.8 GPF for a half flush and 1.28 GPF for a full flush.
The seat height is nearly 17 inches, and the soft-close seat is removable for cleaning and maintenance. This combination makes it a practical choice for buyers who want compact dimensions without a low seat. Measure the available space and check the rough-in; the listing specifies a 12-inch rough-in.
Lordear Comfort-Height Dual-Flush Toilet
The Lordear is best for shoppers who want a taller seat and an elongated bowl. It has a stated 17-inch seat height, which the listing describes as ADA compliant, and offers dual-flush options of 1.1 and 1.6 GPF. Its siphonic vortex flushing system is described as quiet and designed to clear the bowl efficiently.
The skirted design gives the toilet a seamless appearance. Listed dimensions are 14⅜ inches wide, 26⅜ inches deep, and 28¾ inches high, with a standard 12-inch rough-in. Choose this model if comfort height is a priority; avoid assuming it will fit a tight bathroom without checking the listed dimensions against the space.
Sarlai Comfort-Height One-Piece Toilet
The Sarlai is best for buyers seeking a modern one-piece design with a comfort-height seat and soft-closing seat. Its listed features include a fully glazed siphon-flush system, a 12-inch rough-in, and an included wax ring. The product description presents the flush as quiet and powerful.
It was selected as a comfort-focused comparison, not as a confirmed dual-flush option: the provided features do not specify two flush volumes or identify a dual-flush mechanism. Choose it if the listed seat and design features suit you, but confirm the flush controls and water use with the seller before buying if dual flush is essential.
EPLO E18 Smart One-Piece Toilet
The EPLO E18 is best for buyers interested in hands-free operation and added bowl-cleaning features. Its listed features include foot sensors for lid and seat operation, foot-sensor flushing, a built-in tank with booster pump, and emergency power-off flushing. A foam shield is designed to reduce splashback and waste adhesion.
This model is included as a smart-feature alternative, but the provided information does not confirm dual-flush settings or list flush volumes. Choose it if touch-free controls are a priority; confirm whether its flushing system meets your dual-flush requirements before purchase.
Buying Guide: How To Choose A One-Piece Dual-Flush Toilet
What flush volumes should you compare?
Compare both flush settings, not just the lowest number. A lower-volume option may suit liquid waste, while a higher-volume option is intended for solid waste. Among these listings, Bolina specifies 0.8/1.28 GPF, DeerValley specifies 0.8/1.28 GPF, and Lordear specifies 1.1/1.6 GPF. The Sarlai and EPLO details provided here do not establish dual-flush operation.
Will the toilet fit your bathroom?
Measure from the finished wall to the center of the drain to check rough-in, and compare the toilet’s full dimensions with available floor space. Several models list a 12-inch rough-in, but that does not mean their overall depth is the same. For a compact room, the DeerValley listing gives a 24.6-inch projection; Lordear lists its width, depth, and height.
Which bowl and seat height are right?
Round bowls can help conserve space, while elongated bowls are often chosen for additional seating room. Seat height is another key comparison: Lordear lists a 17-inch seat height, DeerValley says nearly 17 inches, and Sarlai describes its seat as comfort height without giving an exact measurement. Check the product dimensions and consider who will use the toilet most often.
What installation details should you check?
Confirm rough-in, dimensions, included parts, and the installation requirements before ordering. Sarlai lists a wax ring as included. The other product details above do not establish that every required installation component is supplied. If the bathroom has unusual plumbing or limited clearance, check with a qualified installer.
Frequently Asked Questions
What is a dual-flush toilet?
A dual-flush toilet provides two flush options, typically using different water volumes for liquid and solid waste. Check the listed GPF values to compare models.
Which listed toilet is designed for a small bathroom?
DeerValley is specifically presented as a compact toilet, with a listed projection of 24.6 inches from the wall.
Which model lists the lowest flush volume?
Bolina and DeerValley each list a 0.8 GPF lower-volume flush. Their higher settings are 1.28 GPF.
Do all five products confirm dual flush?
No. Bolina, DeerValley, and Lordear list two flush volumes. The provided Sarlai and EPLO features do not confirm dual-flush operation.
Why check the rough-in before buying?
The rough-in measurement helps determine whether the toilet’s outlet aligns with the bathroom drain. Compare it with your existing setup before choosing a model.