From compact two-piece to space-saving macerating systems, these 7 high-efficiency toilets cut water use without sacrificing performance. You’ll find 0.8–1.28 GPF models with WaterSense/MAP certifications, ADA options, and easy-clean Nano glaze, plus retrofit kits and dual‑flush valves for flexible installs. As you weigh height, bowl shape, and maintenance, one choice could transform your bathroom—so which fit matches your space and needs?
| Toilet Tank Bank Inserts 3-Pack Water-Saving Device |  | Best Budget Saver | Water Saving: ¾ gal per flush | Installation Type: In-tank insert (<2 min) | Flush/Discharge System: Tank insert to reduce flush volume | CHECK ON AMAZON | Read Our Analysis |
| 360° Tsunami Flush Two-Piece Toilet ADA Self-Clean |  | ADA Efficiency Leader | Water Saving: 1.01 gal per flush | Installation Type: Two-piece toilet; standard setup | Flush/Discharge System: 360° Tsunami flush; 1.01 gal | CHECK ON AMAZON | Read Our Analysis |
| Simple Project 750W PRO Macerating Toilet System |  | Macerating Power | Water Saving: 0.8–1.26 GPF | Installation Type: Upflush macerating installation (behind toilet/wall) | Flush/Discharge System: Dual flush (full/half) | CHECK ON AMAZON | Read Our Analysis |
| 360° Tsunami Flush One-Piece Toilet with Dual Flush |  | Best Dual-Flush | Water Saving: 0.8/1.28 GPF | Installation Type: Floor-mounted, 12″ rough-in | Flush/Discharge System: Dual flush system (0.8/1.28 gal) | CHECK ON AMAZON | Read Our Analysis |
| 3-Inch Dual Flush Valve Conversion Kit with Handle |  | Best Retrofit Upgrade | Water Saving: Up to 50% water saved | Installation Type: DIY-compatible conversion kit | Flush/Discharge System: Dual-flush valve kit | CHECK ON AMAZON | Read Our Analysis |
| Laveo Waterless Dry-Flush Toilet Portable Self-Contained |  | Best Waterless | Water Saving: Waterless | Installation Type: Self-contained, portable | Flush/Discharge System: Not applicable (dry-flush) | CHECK ON AMAZON | Read Our Analysis |
| FLUSH-N-SAV 2-In Dual Flush Valve Kit |  | Best DIY Kit | Water Saving: Up to 50% water saved | Installation Type: Quick-connect valve kit | Flush/Discharge System: Dual flush valve kit | CHECK ON AMAZON | Read Our Analysis |
More Details on Our Top Picks
Toilet Tank Bank Inserts 3-Pack Water-Saving Device
If you’re dealing with an older, less-efficient toilet and want a quick, inexpensive retrofit, the Toilet Tank Bank Inserts 3-Pack is ideal for you—it’s a brick-and-bottle water-saving device that sits in your tank and reduces each flush by about 0.75 gallons. You’ll save ¾ gallon per flush, and at five flushes daily that adds up to 1,300 gallons per year. It’s best with toilets that aren’t low-flow or high-efficiency, since newer models use under 1.6 gallons. Installation takes under two minutes per toilet; just fill the bag and drop it in. Consider one per toilet for max impact today.
- Water Saving:¾ gal per flush
- Installation Type:In-tank insert (<2 min)
- Flush/Discharge System:Tank insert to reduce flush volume
- Finish/Color (appearance):Not specified
- Certification/Standards:Not specified
- Target Use:Older/less-efficient toilets
- Additional Feature:Brick-and-bottle design
- Additional Feature:0.75 gal per flush
- Additional Feature:For older toilets only
360° Tsunami Flush Two-Piece Toilet ADA Self-Clean
The Tsunami Flush Two-Piece Toilet is the best choice if you need a high-efficiency, ADA-compliant option for commercial or public restrooms that demand powerful, clog-resistant flushing and easy maintenance, thanks to its 360° jet siphonic flush and self-cleaning ceramic coatings. With a 50mm enlarged drain and a 1.01 Gal flush, you reduce clogs while maintaining performance. The 17.3-inch height and elongated bowl deliver ADA accessibility, and the side-mounted handle keeps operations simple. Ceramic-coated drainage resists stains, while Nano Clean glaze adds a self-cleaning edge. It’s WaterSense and MAP certified for efficiency and strong waste extraction. Designed for heavy use.
- Water Saving:1.01 gal per flush
- Installation Type:Two-piece toilet; standard setup
- Flush/Discharge System:360° Tsunami flush; 1.01 gal
- Finish/Color (appearance):White
- Certification/Standards:WaterSense; MAP; CUPC
- Target Use:Commercial/ADA-accessible contexts
- Additional Feature:1.01 Gal flush
- Additional Feature:WaterSense certified
- Additional Feature:ADA compliant height
Simple Project 750W PRO Macerating Toilet System
For basement or attic bathrooms that need space-saving pumping, you’ll notice Simple Project 750W PRO Macerating Toilet System stands out with its 750W macerator and the ability to grind and pump waste up to 360 ft horizontally, 36 ft vertically. It uses four water inlet ports to support multiple devices like macerating toilets, showers, and bathtubs, offering layouts. The unit runs quietly, with a stainless steel blade grinder, ceramic white finish, and 20D x 14.6W x 30.7H footprint, weighing 84 pounds. It features dual-flush options, carbon filtration ventilation, and a 1-year warranty, including pump, toilet bowl, water tank, mounting accessories.
- Water Saving:0.8–1.26 GPF
- Installation Type:Upflush macerating installation (behind toilet/wall)
- Flush/Discharge System:Dual flush (full/half)
- Finish/Color (appearance):White
- Certification/Standards:Not specified
- Target Use:Basement/attic upflush installations
- Additional Feature:Horizontal reach 360 ft
- Additional Feature:Four water inlets
- Additional Feature:1-year warranty
360° Tsunami Flush One-Piece Toilet with Dual Flush
With a 360° Tsunami flush and dual-flush design, this one-piece model delivers a complete, no-dead-spot flush while using far less water—ideal for households prioritizing efficiency without sacrificing performance. You get WaterSense-certified efficiency at 0.8/1.28 gal per flush, and the MAP discharge performance of 1000 grams per flush backs your results. Its ceramic body resists staining, scale, and swelling, with a 17.3-inch ADA height, elongated bowl, soft-close seat, and 12-inch rough-in. Easy hygienic cleaning comes from Nano Clean ceramic and a three-layer glaze. It’s CUPC-certified for safety and durability, and the warranty options provide reassurance. Shop with confidence through Amazon.
- Water Saving:0.8/1.28 GPF
- Installation Type:Floor-mounted, 12″ rough-in
- Flush/Discharge System:Dual flush system (0.8/1.28 gal)
- Finish/Color (appearance):White
- Certification/Standards:MAP; CUPC; WaterSense
- Target Use:Residential/commercial toilets
- Additional Feature:Dual flush system
- Additional Feature:MAP certified discharge
- Additional Feature:ADA height 17.3″
3-Inch Dual Flush Valve Conversion Kit with Handle
A 3-inch dual-flush valve upgrade lets you cut water use by up to 50% without sacrificing flush power, making High-Efficiency Toilets ideal for homes, apartments, and commercial bathrooms.
This all-in-one kit includes a 3-inch dual flush valve, chrome handle, adjustable fill valve, adjustable overflow tube, and a hardware pack, plus installation guide. It replaces old flapper-and-chain mechanisms, compatible with toilets that have 3-inch discharge openings. You’ll gain improved performance with optimized flow, fewer clogs, and precise water control through adjustable fill height. It’s DIY-friendly but works with pros too, upgrading your toilet system quickly without tearing out the tank.
- Water Saving:Up to 50% water saved
- Installation Type:DIY-compatible conversion kit
- Flush/Discharge System:Dual-flush valve kit
- Finish/Color (appearance):Not specified
- Certification/Standards:Not specified
- Target Use:Standard toilets upgrading efficiency
- Additional Feature:3-inch valve compatibility
- Additional Feature:Two flush options
- Additional Feature:DIY install kit
Laveo Waterless Dry-Flush Toilet Portable Self-Contained
Laveo’s waterless, portable dry-flush toilet is ideal if you’re off-grid or living in a tiny space like a tiny home, van, boat, or RV, because it’s self-contained and doesn’t require water or plumbing.
In this setup, you get a battery, charger, USB, two cartridges, and one Pee Powder bottle, which extends cartridge life by about 40%. Each cartridge handles 15 solids flushes; with Pee Powder you’ll reach about 28 flushes. No bulking material or chemicals are needed, and cleaning is straightforward—remove a black airtight bag when the cartridge ends. It delivers odorless operation, toilet height, and a 1-year warranty.
- Water Saving:Waterless
- Installation Type:Self-contained, portable
- Flush/Discharge System:Not applicable (dry-flush)
- Finish/Color (appearance):White
- Certification/Standards:Not specified
- Target Use:Off-grid/wild/off-road setups
- Additional Feature:Waterless operation
- Additional Feature:Portable self-contained
- Additional Feature:Includes two cartridges
FLUSH-N-SAV 2-In Dual Flush Valve Kit
If your toilet uses a 2-inch flush valve, the FLUSH-N-SAV 2-In Dual Flush Valve Kit is a smart upgrade that delivers two flushing options, a quick-connect setup, and a field-ready DIY install. It fits most 2-inch openings and checks compatibility with standard round and elongated tanks.
With a liquid flush around 0.8–1.0 gal and a solids flush about 1.6–2.0 gal, you save up to 50% on water while maintaining performance. The kit includes the dual flush valve, handle, and overflow conserver in a tool-free, leak-proof install. It’s adjustable for liquids or solids on most 2-inch toilets for long-term use.
- Water Saving:Up to 50% water saved
- Installation Type:Quick-connect valve kit
- Flush/Discharge System:Dual flush valve kit
- Finish/Color (appearance):White
- Certification/Standards:EPA; WaterSense
- Target Use:Standard residential toilets (upgrade option)
- Additional Feature:2-Inch valve kit
- Additional Feature:Quick-connect installation
- Additional Feature:EPA WaterSense certified
Factors to Consider When Choosing High-Efficiency Toilets That Use a Fraction of the Water Per Flush
When you pick a high-efficiency toilet, start by comparing water-saving metrics and the available flush volume options. Check certifications and standards to guarantee performance, and weigh ADA accessibility benefits for all users. Finally, factor in installation considerations to make sure the unit fits your space and plumbing setup.
Water Saving Metrics
How much water can you save with a high-efficiency toilet? You’re aiming for about 1 gallon per flush or less, with many models in the 0.8–1.0 gallon range. Look for WaterSense certification to guarantee efficiency without sacrificing performance. Dual-flush designs can cut usage further, often delivering 0.8 gallons for liquids and higher amounts for solids depending on the model. MAP certification confirms strong waste extraction per flush, up to roughly 1000 grams, so you don’t trade efficiency for clogs. If you’re upgrading older, non-high-efficiency toilets, inserts or upgrades can save about 0.75 gallon per flush, potentially totaling over 1300 gallons saved annually at five flushes per day. In short, choose metrics that balance per‑flush volume, certification, and real-world performance for your home and budget.
Flush Volume Options
Balancing water use and performance matters when picking flush volumes. With dual-flush models, you’ll typically see a light flush around 0.8 gallons and a full flush at about 1.28 gallons, letting you choose based on waste size. Some high-efficiency designs run about 1.01 gallons per standard cycle, trimming consumption without sacrificing reach. Other dual-flush setups vary widely, offering light or liquid flushes around 0.8–1.0 gallons and solids flushes around 1.6–2.0 gallons, depending on the model. WaterSense toilets often target 1.28 gallons per flush or less, and some perform well at 0.8 gallons, so you won’t necessarily give up efficiency. When selecting flush volumes, match your option to your toilet’s tank opening and performance needs to avoid reduced flushing power for consistent results and reliability.
Certification And Standards
Why do certifications matter when choosing high-efficiency toilets that use less water per flush? They show you a model meets efficiency and performance standards without sacrificing flush reliability. WaterSense confirms you’re getting real water savings and solid performance. MAP signals strong waste extraction, up to 1000 grams per flush, giving you confidence in challenging waste scenarios. CUPC verifies safety and durability of materials and components, so you’re investing in a unit that lasts. Dual-flush designs commonly average 0.8–1.28 gallons per flush, aligning with incentives from certification programs. In short, complying with these standards helps you water less while maintaining dependable operation in your high-efficiency toilet choice. Look for seals, guarantee compatibility with your plumbing, and compare models across brands to maximize savings and reliability.
ADA Accessibility Benefits
ADA-compliant high-efficiency models are designed with accessibility in mind, typically offering an elevated height around 17.3 inches to ease transfers from a wheelchair or cane. Elongated bowls provide additional seating area, improving stability and comfort for users with mobility limitations. Soft-close lids reduce the risk of pinched fingers and sudden movements, aiding users with dexterity challenges. Designs marketed as ADA-friendly in commercial settings are built to accommodate accessibility standards and frequent use by diverse users. Dual flush or high-efficiency options help maintain accessible performance without compromising ease of use for individuals with limited mobility.
You’ll notice that these features work together to support independent use in homes and public restrooms, reducing the need for assistance while conserving water. That combination benefits every user daily.
Installation Considerations
After aiming for accessible features, you’ll want to confirm the toilet fits your space and plumbing. Start by verifying rough-in size and compatibility—most high-efficiency, floor-mounted models use a 12-inch rough-in. Check the space around the base for maintenance and consider potential in-wall or concealed mounting options.
Next, review the flush valve configuration (dual-flush 0.8–1.28 gal per flush or 1.0 gal per flush) and guarantee your surrounding plumbing can accommodate the hardware. Look for ADA-height options (about 17.3 inches) and elongated bowls to match user comfort. Guarantee behind-toilet clearance is adequate for service, and that retrofit components (dual-flush kits, conversion valves, or upflush/macerto systems) won’t hinder performance or installation. Confirm the setup preserves the intended water savings without sacrificing flush reliability and ease of maintenance.
Frequently Asked Questions
What Is the Average Water Savings Year Over Year With HETS?
On average, you’ll see about 20-30% less water use yearly with HETs, depending on your toilet’s old efficiency and flushing habits; upgrade, adjust your fill valves, and consistently use full flushes for best savings overall.
Do HETS Require Special Plumber Licensing or Permits?
You typically don’t need special licensing just to install a toilet, but many jurisdictions require a permit for plumbing work and inspections; check local building codes, whose rules may mandate a licensed plumber for rough-ins.
Can Low-Flow Toilets Prevent Clogs in High-Use Homes?
You can reduce clogs with low-flow toilets in high-use homes, but they don’t guarantee zero jams. Choose models with trapways and efficient flushing, and maintain them; avoid paper-heavy loads, and consider venting to improve flow.
How Does Soil and Vent Sizing Affect Flush Performance?
Soil and vent sizing directly influence your flush performance: proper sizing prevents siphon break and trap seal loss, keeps air and water moving freely, reduces clog risk, and maintains steady flow pressure during every flush.
Are There Rebates or Incentives for Upgrading to HETS in 2026?
Yes, you can find rebates and incentives for upgrading to HETs in 2026. Check your utility’s programs, state rebates, and local government offers; you might also access federal tax credits or energy/water efficiency grants.
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