Sloan vs Kohler vs Zurn vs TOTO Automatic Flush Valves
Choosing an automatic flush valve is not only about brand name. The better question is how each system handles sensor accuracy, power, water volume, service access, maintenance, and fixture compatibility in real commercial restrooms.
Why This Comparison Matters
Sloan, Kohler, Zurn, and TOTO all make automatic flush valves for high-use public restrooms, but they do not solve the same problem in the same way. Some lines focus on familiar diaphragm service parts. Others emphasize piston accuracy, hybrid energy, hydropower, connected monitoring, or coordinated fixture performance.
For architects, contractors, facility managers, and restroom product buyers, the best choice depends on the building. A school may prioritize vandal resistance and easy replacement parts. A hotel may care about finish options and low-noise performance. An airport may need fast maintenance access and long battery life. A sustainability-driven project may look closely at 1.28 GPF toilet systems, 0.5 GPF urinal systems, or hydropowered operation.
This guide compares the four brands from a technical, practical, and specification-focused point of view.
Best Fit by Priority
Automatic Flush Valve Comparison
Specifications vary by exact model, fixture, region, and installation package. Use this table as a guide before checking the latest spec sheet for the exact SKU being specified.
| Brand | Common Product Families | Valve / Actuation Approach | Power Options | Typical Flush Volumes | Strongest Fit | Specifier Watch Point |
|---|---|---|---|---|---|---|
| Sloan | G2, ECOS, Optima, RESS retrofit, SOLIS, CX | Infrared sensor operation, diaphragm-based commercial flushometer platforms, manual override on many sensor models | Battery, hardwired, solar-assisted or connected options depending on family | Toilets commonly 1.6, 1.28, 1.1 GPF; urinals commonly 1.0, 0.5, 0.25, 0.125 GPF by model | Large commercial facilities that value part availability, brand familiarity, and sensor retrofit paths | Confirm fixture pairing, rough-in, battery service plan, and minimum flowing pressure for the selected fixture. |
| Kohler | Mach Tripoint, Mach WAVE, Mach Flex, Mach Manual | Electronic sensor systems with piston technology on Mach platforms; WAVE and Tripoint sensing options | DC battery and Hybrid Energy System options depending on SKU | Toilets commonly 1.6, 1.28, 1.0 GPF; urinals commonly 1.0, 0.5, 0.125 GPF | Coordinated commercial restroom designs, hotel projects, premium finishes, and Kohler fixture packages | Check whether the project needs exposed, concealed, retrofit, DC, or hybrid energy configuration. |
| Zurn | AquaSense, ZTR, ZER, ZEMS, Metroflush | Piston and diaphragm sensor valve platforms; many models emphasize clog-resistant internals and chemical-resistant seals | Battery, hardwired, hydropowered, long-life battery, and connected options by family | Toilets commonly 1.6, 1.28, 1.1 GPF; urinals commonly 1.0, 0.5, 0.125 GPF by model | Schools, healthcare, restaurants, higher education, public buildings, and retrofit-heavy maintenance environments | Match the valve family to maintenance preference: piston, diaphragm, hardwired, battery, hydropower, or connected monitoring. |
| TOTO | EcoPower exposed and concealed flush valves | Hydropowered automatic infrared sensor valves with piston technology and self-adjusting sensing on many models | Self-powered hydroelectric EcoPower system; IoT-enabled variants available on select models | Toilets commonly 1.6, 1.28, 1.0 GPF; urinals commonly 1.0 and 0.5 GPF by product line | Projects seeking low routine battery replacement, water savings, and high-efficiency commercial restroom performance | Confirm water pressure, usage conditions, reclaimed-water options, and compatible TOTO or third-party fixtures. |
Note: GPF ranges are representative of current commercial flushometer product families and should be verified against the final model number before specification or purchase.
Key Technical Factors
Automatic valves should detect real users without repeated ghost flushing. Look for detection range, delay timing, and manual override design.
Battery systems are simple to install. Hardwired systems reduce battery service. Hydropowered systems use water movement to generate power.
Diaphragm valves are familiar to many maintenance teams. Piston valves can offer accurate flush volume and debris-resistant performance when properly maintained.
Common toilet flushometer options include 1.6, 1.28, 1.1, and 1.0 GPF. Urinal systems may use 1.0, 0.5, or ultra-low 0.125 GPF options.
Flushometer performance depends on the fixture, supply size, pressure, and drainline condition. Always verify minimum flowing pressure.
For public restrooms, parts access matters as much as the original purchase price. Check batteries, filters, diaphragms, pistons, solenoids, covers, and stop assemblies.
Brand-by-Brand Analysis
Sloan Automatic Flush Valves
Sloan is one of the most recognized names in commercial flushometers. Its automatic platforms are often selected for schools, airports, office buildings, stadiums, healthcare facilities, and other restrooms where service teams want familiar parts and a large support ecosystem.
Sloan G2 and ECOS sensor flushometers commonly use infrared detection, battery power on many exposed models, fixed metering bypasses, and manual courtesy flush buttons. Sloan is especially strong when a project needs retrofit options, broad model coverage, and long-term maintenance familiarity.
- Good for: high-traffic retrofits, public buildings, facilities with existing Sloan inventory.
- Watch: exact flow volume, rough-in, battery schedule, and fixture compatibility.
Kohler Automatic Flush Valves
Kohler’s Mach commercial flushometer line is useful when design coordination matters. The brand offers toilet and urinal flushometers across manual, touchless, DC-powered, and hybrid energy categories, with finish options that can support higher-design commercial interiors.
Mach Tripoint and Mach WAVE models focus on accurate activation, piston performance, rubber component resistance, mechanical override, and water-efficient GPF options. Kohler is a strong fit for hospitality, corporate, retail, and coordinated restroom packages where the flush valve is part of a wider fixture design.
- Good for: hospitality, corporate restrooms, coordinated Kohler fixture packages.
- Watch: HES vs DC power, exposed vs concealed models, and retrofit vs new installation versions.
Zurn Automatic Flush Valves
Zurn’s AquaSense, ZTR, ZER, ZEMS, and Metroflush platforms cover many institutional and commercial applications. The brand often emphasizes durable covers, chemical-resistant internal seals, clog-resistant pistons or diaphragms, and options for hardwired, battery, hydropowered, or connected maintenance programs.
Zurn is practical for contractors and facility teams that want robust assemblies for healthcare, education, restaurants, public buildings, and retrofit work. The ZTR piston models are particularly relevant when a project wants sensor operation, water savings, and maintenance-focused internal design.
- Good for: institutional restrooms, maintenance-heavy buildings, connected monitoring options.
- Watch: piston vs diaphragm family, battery life option, connected gateway requirements, and exact repair kit compatibility.
TOTO EcoPower Flush Valves
TOTO’s EcoPower line is different because it uses water-powered turbine technology to charge the power supply during operation. That makes it attractive for facilities that want touchless performance without routine battery replacement or hardwired power for every valve.
EcoPower models typically focus on hydropower, self-cleaning piston valve design, smart sensor detection, manual override, and high-efficiency toilet or urinal flush volumes. TOTO is often a strong choice for sustainability-driven projects, premium public restrooms, and facilities that want lower routine electrical maintenance.
- Good for: sustainability-focused projects, low battery-maintenance goals, high-efficiency restrooms.
- Watch: water pressure range, usage conditions, reclaimed-water versions, and compatible fixture pairing.
Water Use by Flush Volume
The chart below shows estimated water use at 10,000 activations. It is a simple reference calculation, not a brand ranking. Actual savings depend on user count, fixture performance, maintenance condition, false activations, and local code requirements.
Formula used: flush volume × 10,000 activations. For WaterSense-oriented toilet projects, verify that both the valve and bowl are compatible and certified as a system.
Best Choice by Building Type
Sloan and Zurn are strong candidates because parts familiarity, quick service, vandal resistance, and retrofit coverage matter in very high-use restrooms.
Kohler and TOTO often fit well where appearance, lower perceived maintenance, quiet operation, and coordinated fixture design are important.
Zurn and Sloan are practical choices when the maintenance team needs rugged hardware, serviceable internals, and broad replacement-part availability.
Touchless operation is useful for hygiene-focused spaces. Compare sensor reliability, override access, trap-seal features, and hardwired or long-life power options.
Sloan RESS, Kohler retrofit Mach models, and Zurn retrofit-compatible sensor valves should be reviewed against the existing valve body, stop, rough-in, and fixture.
Look at 1.28 GPF toilet systems and 0.5 or 0.125 GPF urinal systems, but confirm drainline carry and bowl performance before reducing flush volume.
How to Specify the Right Valve
- Start with the fixture. Confirm toilet or urinal model, top spud or back spud, rough-in, and recommended flush volume.
- Check water pressure. Verify static and flowing pressure under peak building demand.
- Choose the power strategy. Battery is easy, hardwired is steady, hybrid reduces battery load, and hydropower can reduce routine battery service.
- Match maintenance skills. Some teams prefer diaphragm parts. Others prefer piston assemblies or cartridge-style systems.
- Plan for false flush prevention. Sensor range, delay time, and target detection are critical in narrow stalls and reflective restroom layouts.
- Verify code and labeling. Confirm ASSE/ASME/CSA compliance, ADA installation needs, WaterSense requirements, and local plumbing code.
What to Avoid
- Selecting 1.0 or 1.28 GPF without confirming bowl performance.
- Ignoring drainline condition in older commercial buildings.
- Choosing battery valves without a battery replacement plan.
- Installing sensor valves where reflective surfaces cause false activation.
- Mixing valve and fixture brands without checking paired performance.
- Assuming every WaterSense-labeled component automatically works as a complete system.
Which Brand Is Best?
There is no single winner for every restroom. Sloan is often the safest choice for broad commercial familiarity and long-term service support. Kohler stands out when design coordination, finish options, and piston-based Mach platforms matter. Zurn is highly practical for rugged institutional projects and maintenance-driven specifications. TOTO is especially compelling when hydropowered EcoPower operation and reduced routine battery maintenance are key goals.
For most high-traffic restroom projects, the best approach is to shortlist two brands, compare the exact model numbers, then check fixture compatibility, pressure requirements, sensor behavior, available repair parts, warranty, and local code compliance. The valve is only one part of the system. The best automatic flush performance comes from a correctly matched valve, fixture, water supply, drainline, and maintenance plan.
Automatic Flush Valve FAQs
Are automatic flush valves better than manual flush valves?
Automatic flush valves improve touchless operation and can provide more consistent activation in public restrooms. Manual valves can still be simpler and lower cost. The better choice depends on restroom traffic, hygiene goals, power access, maintenance staffing, and budget.
Is 1.28 GPF enough for a commercial toilet?
A 1.28 GPF flushometer can work well when paired with a compatible high-efficiency bowl and proper water pressure. It should not be selected without checking the fixture manufacturer’s guidance and local plumbing conditions.
Which is better: battery, hardwired, hybrid, or hydropowered?
Battery valves are easy to retrofit. Hardwired valves reduce battery service. Hybrid systems can extend power life. Hydropowered valves use water flow to charge the system and can reduce routine battery replacement. The best choice depends on installation cost, access, restroom traffic, and maintenance strategy.
Do Sloan, Kohler, Zurn, and TOTO all offer WaterSense options?
These brands offer water-efficient commercial flushometer options, but WaterSense status depends on the exact valve, fixture, flow volume, and certification. Always confirm the final SKU and paired fixture before publishing a specification.
Can a sensor flush valve be installed on an existing manual valve?
In many cases, yes, but compatibility depends on the existing valve body, stop, rough-in, fixture, water pressure, and retrofit kit. Sloan, Kohler, and Zurn all have retrofit-oriented options in certain product families.
Manufacturer and Standard Sources
Use these references to confirm current model details, product families, certifications, and installation requirements before final specification.
