You’ll get top water savings, reliable flushes, and easy cleaning with these five one-piece toilets: DeerValley Elongated Dual‑Flush, DeerValley Symmetry Dual‑Flush, the Elongated One‑Piece Dual‑Flush with soft‑close seat, KE KING One‑Piece 1.28 GPF, and another DeerValley elongated dual‑flush model—each balances compact design, MaP‑level performance, and glazed trapways to resist clogs and staining. Pick based on rough‑in, seat height, and preferred flush type; keep going to see specs, installation tips, and comparisons.
| DeerValley Elongated Dual-Flush Modern One-Piece Toilet |
| Modern Design Pick | Bowl Shape: Elongated | Unit Type: One-piece | Flush Type: Dual-flush (1.1 / 1.6 GPF) | VIEW LATEST PRICE | Read Our Analysis |
| DeerValley Symmetry Dual-Flush Elongated One-Piece Toilet |
| Best for Small Baths | Bowl Shape: Elongated | Unit Type: One-piece | Flush Type: Dual-flush (1.1 / 1.6 GPF) | VIEW LATEST PRICE | Read Our Analysis |
| Elongated One-Piece Dual-Flush Toilet with Soft-Close Seat |
| Best Comfort & Performance | Bowl Shape: Elongated | Unit Type: One-piece | Flush Type: Dual-flush (1.1 / 1.6 GPF) | VIEW LATEST PRICE | Read Our Analysis |
| KE KING One Piece Elongated Toilet 1.28 GPF |
| Water-Saving Choice | Bowl Shape: Elongated | Unit Type: One-piece | Flush Type: Single-flush (1.28 GPF) | VIEW LATEST PRICE | Read Our Analysis |
| DeerValley One-Piece Elongated Dual-Flush Toilet |
| Easy-Maintenance Favorite | Bowl Shape: Elongated | Unit Type: One-piece | Flush Type: Dual-flush (1.1 / 1.6 GPF) | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
DeerValley Elongated Dual-Flush Modern One-Piece Toilet
Should you want a sleek, low-maintenance toilet that saves water without sacrificing power, the DeerValley elongated one-piece dual‑flush is a strong choice — its 1.1/1.6 GPF dual flush plus powerful siphon action delivers reliable performance while the fully‑glazed, self‑cleaning surface keeps upkeep minimal. You get a modern, white one-piece measuring 28.75″ x 14″ x 28″ with a 16 7/8″ seat height and 10″ rough‑in. Its 800G flush score, quiet clog‑resistant tramway glazing, and durable finish resist yellowing. Two large side mounting holes simplify installation; videos and responsive support back the product and warranty.
- Bowl Shape:Elongated
- Unit Type:One-piece
- Flush Type:Dual-flush (1.1 / 1.6 GPF)
- Seat Type:Elongated seat (soft-close implied)
- Trapway / Skirted Design:Fully glazed / skirted trap (quiet, clog-resistant)
- Warranty / Support:Ongoing customer support via platform email (quality commitment)
- Additional Feature:10″ rough-in compatibility
- Additional Feature:Powerful 800G flush score
- Additional Feature:Self-cleaning glazed surface
DeerValley Symmetry Dual-Flush Elongated One-Piece Toilet
Should you’ve got a small bathroom but want ergonomic comfort and strong flushing power, the DeerValley Symmetry Dual-Flush Elongated One-Piece Toilet is a smart pick. You’ll appreciate its space-saving 26.77 x 14.37 x 27.17-inch profile and ergonomic elongated seat. The dual-flush siphon gives 1.6 GPF full and 1.1 GPF light options, handling up to 1,000 grams with low noise and clog resistance. Cleaning’s easier thanks to the seamless full-skirt trap and quick-release soft-closing seat. Installation’s simplified with large side openings, included wax ring, bolts, adapter, and clear instructions. A 12-month warranty and platform email support are included.
- Bowl Shape:Elongated
- Unit Type:One-piece
- Flush Type:Dual-flush (1.1 / 1.6 GPF)
- Seat Type:Elongated soft-close quick-release seat (included)
- Trapway / Skirted Design:Seamless full-skirt trap (easy cleaning)
- Warranty / Support:12-month warranty; customer support via platform email
- Additional Feature:Soft-closing quick-release seat
- Additional Feature:Includes 1/2″ water adapter
- Additional Feature:Compact space-saving design
Elongated One-Piece Dual-Flush Toilet with Soft-Close Seat
Assuming you want a low-maintenance, powerful toilet that looks sleek in a modern bathroom, the elongated one-piece dual-flush model with a soft-close seat is a great pick — its fully skirted ceramic body and rimless tornado swirl flush cut down on cleaning and clogs, while the dual 1.1/1.6 GPF settings save water without sacrificing performance. You’ll get an ergonomic 18.43″ elongated seat at 16.8″ height, a MaP 1000 g rating, and a fully glazed trapway that resists buildup. Installation’s straightforward with side-mounted holes, quick-release seat, and included hardware; two people should lift it. Warranty covers 12 months.
- Bowl Shape:Elongated
- Unit Type:One-piece
- Flush Type:Dual-flush (1.1 / 1.6 GPF)
- Seat Type:Elongated soft-close seat (included)
- Trapway / Skirted Design:Fully skirted trapway (fully glazed, rimless swirl)
- Warranty / Support:12-month warranty; lifetime customer service and 24-hour support
- Additional Feature:12″ rough-in requirement
- Additional Feature:Rimless tornado swirl
- Additional Feature:Stainless-steel rust-proof hinges
KE KING One Piece Elongated Toilet 1.28 GPF
Should you want a low-water, high-performance toilet that’s easy to keep clean, the KE KING One Piece Elongated Toilet 1.28 GPF is a great choice for households and remodels where space and efficiency matter. You’ll get a sleek elongated bowl with a skirted trapway that hides plumbing and wipes clean easily. Its 1.28 GPF flush uses a unique pipe design and fully glazed interior trapway to prevent clogs and maintain strong flows; every unit is factory tested. It ships ready to install with a soft-closing seat, wax ring, bolts, and a one-year warranty plus lifetime after-sale support.
- Bowl Shape:Elongated
- Unit Type:One-piece
- Flush Type:Single-flush (1.28 GPF)
- Seat Type:Elongated soft-close seat (pre-installed)
- Trapway / Skirted Design:Skirted trapway (fully glazed interior trapway)
- Warranty / Support:1-year limited warranty; lifetime after-sale service (12-hour response)
- Additional Feature:1.28 GPF efficient flush
- Additional Feature:Chromed side lever
- Additional Feature:100% factory tested
DeerValley One-Piece Elongated Dual-Flush Toilet
Provided that you want a low-maintenance, water-saving toilet that looks sleek, the DeerValley One-Piece Elongated Dual-Flush is a smart pick—its skirted, one-piece design and premium glaze cut down on grime and staining so cleaning stays quick, while the 1.1/1.6 GPF dual-flush saves up to 16,500 gallons a year compared with older 3.5 GPF models. You get an elongated bowl, soft-close seat, and standard 16 7/8″ seat height in a 28.75″ L x 14″ W x 28″ H footprint. Installation uses a 12″ rough-in and large side access holes; expect a few hours with basic plumbing help. A 12-month warranty and lifetime after-sales support round it out.
- Bowl Shape:Elongated
- Unit Type:One-piece
- Flush Type:Dual-flush (1.1 / 1.6 GPF)
- Seat Type:Elongated soft-close seat (included)
- Trapway / Skirted Design:Skirted exterior (premium glaze, easy cleaning)
- Warranty / Support:12-month warranty; lifetime after-sales support via platform email
- Additional Feature:Saves ~16,500 gal/year
- Additional Feature:12″ rough-in specification
- Additional Feature:Skirted exterior design
Factors to Consider When Choosing One Piece Toilets
While picking a one-piece toilet, you’ll want to compare bowl shape and size to fit your bathroom and comfort needs. Check flush performance, trapway design, and the toilet’s water efficiency rating to make certain reliable waste removal and low water use. Also consider seat height and overall comfort so the toilet feels right for everyday use.
Bowl Shape & Size
You’ll usually choose between elongated and round bowls, so start instead matching bowl length and seat height to your space and comfort needs. Elongated bowls run about two inches longer than round models, giving more seating surface and comfort for adults. Round bowls, roughly 16.5–17.5 inches front-to-back, work better in tight bathrooms where every inch counts. Consider seat height alongside shape: standard seats sit about 15–17 inches, while comfort/ADA heights are 17–19 inches and make sitting and standing easier. Measure your rough-in distance and clearance—an elongated bowl needs additional room in front. Keep in mind skirted one-piece toilets alter external lines and simplify cleaning without changing the internal bowl dimensions that determine comfort and fit. Choose based on space and ergonomics.
Flush Performance
After you’ve matched bowl shape and seat height to the space, the next big decision is how well the toilet actually flushes. You’ll want to compare GPF options—dual-flush setups commonly use about 1.1 GPF (partial) and 1.6 GPF (full), while efficient single-flush models hover near 1.28 GPF—to balance clearing power and performance. Check MaP ratings or grams-cleared figures (for example, 1,000 g) to see real-world solids removal. Know the flush type: siphon and rimless/tornado swirl designs give quieter, clog-resistant action, while pressure-assisted units deliver greater force and speed. Inspect trapway size and glazing; fully glazed, larger trapways and skirted profiles cut clogs and sustain consistent performance. Factor noise as opposed to perceived power when choosing.
Water Efficiency Rating
Because water use affects both your utility bill and the planet, check a toilet’s gallons-per-flush (GPF) rating alongside real-world performance metrics before you buy. Look for 1.6 GPF models as baseline, 1.28 GPF high-efficiency units, or dual-flush options offering roughly 1.6 GPF (full) and 1.1 GPF (partial). Prefer WaterSense-certified toilets to guarantee EPA-verified efficiency and performance at 1.28 GPF or less. Don’t rely solely on rated GPF: verify MaP scores to confirm waste clearance in grams, and factor in clog frequency and reliability. A poorly performing low-flow unit can force repeat flushes that erase water savings. Choosing a proven high-efficiency or dual-flush toilet can cut household water use dramatically versus older 3.5–7.0 GPF fixtures.
Seat Height & Comfort
Whenever choosing a one-piece toilet, seat height is one of the simplest changes that can make daily use noticeably more comfortable; aim for the 17–19 inch “comfort” range provided you or household members have mobility issues, while 15 inches remains standard for compact spaces. You’ll reduce knee and hip strain with taller seats, which helps older adults and those recovering from surgery. Check whether the bowl is elongated—those add about 1–2 inches of front-to-back length and improve legroom. Measure the bathroom carefully so the seat height and bowl length don’t interfere with fixtures or clearance in tight layouts. Also compare total toilet height plus seat thickness, since manufacturers’ seat-height specs can vary per an inch depending on the included seat.
Trapway Design Ease
While trapway design is often out of sight, it has a big impact on how easily you’ll maintain and troubleshoot a one-piece toilet. You’ll want a fully glazed, high-gloss trapway to reduce friction and buildup so clogs are less likely and cleaning takes less effort. Favor a larger diameter—about 2.0 inches or more—to improve waste passage and cut clog risk. Rimless or rimless-style designs direct water more effectively into the trapway, enhancing flush performance and lowering residue. Skirted or concealed trapways create a smooth exterior that eliminates crevices, though they can make repair access a bit trickier. Ideally choose a wide, unobstructed profile with accessible inspection or mounting ports to simplify maintenance and minimize manual clearing.
Installation Requirements
A well-designed trapway helps long-term performance, but proper installation makes certain that performance holds up in your bathroom. Before buying, verify the rough-in (commonly 10″, 12″, or 14″) so the one-piece aligns with your drain and avoids re-plumbing. Confirm overall dimensions and seat height to make sure the bowl clears doors, cabinets, and fixtures.
Check the water supply inlet location and connection size (usually 1/2″) so the supply line reaches without strain or adapters. Make certain floor mounting provisions—bolt locations and number—match your flange, and that the subfloor is level and structurally sound to support the toilet’s weight. Plan for two people to lift and set the unit, and have a wax or wax-free seal plus flange hardware ready for a secure, leak-free installation.
Material Durability
Assuming you want a one-piece toilet that stays attractive and functional for years, focus on materials and finishes that resist wear: high-fired porcelain vitreous china produces a denser, less porous surface that resists staining and chipping, full glaze—especially across the trapway—reduces scale and clogs, and corrosion-resistant hardware (stainless hinges, rustproof bolts, durable flush valves) prevents mechanical failures; additionally, self-cleaning or hydrophobic glazes and skirted designs cut cleaning time and slow discoloration. You should choose models with one-piece construction to eliminate seams that can leak or weaken. Inspect glazing coverage and firing quality; ask manufacturers for firing temperature or glazing specs. Favor stainless or brass internal parts and replaceable valves. Prioritizing these details minimizes maintenance, preserves appearance, and extends service life.
