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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
For most bathrooms, the Zurn AquaSense E-Z Flush retrofit kit is the automatic toilet flusher to buy. It bolts onto a standard flushometer valve (the flush mechanism inside commercial toilets) in minutes, runs on batteries, and has a metal-covered sensor head that holds up in busy bathrooms. The rest of this list covers the genuinely good alternatives — and the one or two that only suit a very specific toilet.
This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Touchless flushing sounds like a gimmick until you live with it, and then you never want to go back to a wet handle. Before you buy, though, you need to know one thing: these kits are not universal, and the wrong one simply will not fit your valve or your tank. Here is how to sort the real options for the best automatic toilet flusher without wasting a weekend on returns.
Top Picks
How To Choose The Best Automatic Toilet Flusher
The single most common mistake here is buying before you have looked inside your own toilet tank or behind your flush handle. These kits come in two families, and they are not interchangeable. Get the family right first, and the rest of the shopping is easy.
Flushometer retrofit or tank-mounted kit?
Commercial-style toilets use a flushometer — the chrome valve pipe behind the bowl that you press to flush. Retrofit kits for these replace the handle with a battery-powered infrared sensor head. A tank-mounted kit is different: it hides a small motor and sensor inside a residential toilet tank and pulls the existing flapper chain for you. If your toilet has a tank, you want the second type. If it has an exposed chrome valve, you want the first.
Check your toilet’s valve before anything else
Retrofit sensor heads bolt onto a specific valve body, and the inlet connection size has to match. A kit built for a 1.5-inch inlet will not seal onto a differently sized valve. Zurn’s kits are made to fit water closets and urinals from Zurn and other manufacturers, but “other manufacturers” is not “all manufacturers” — one owner found the flusher simply would not seat on their urinal at all.
The tank-kit compatibility list matters more than the price
Tank sensor kits generally work with canister and flapper toilets. They are not compatible with dual-flush, top-mount flush, pressure-assist, or ballcock valve toilets. If you have a two-button dual-flush toilet, most tank kits are off the table entirely, and you need a valve-mount unit instead.
Sensor placement is the other half of the story. A sensor that sees the stall door instead of the person will trigger when nobody is there, and a sensor mounted too high will miss short users. Look for an adjustable sensor range and, where possible, a manual override button so a dead battery never leaves you stranded.
Side-by-Side Comparison
| Model | Best For | Type | Power | Connection / Fit | Amazon |
|---|---|---|---|---|---|
| Zurn ZERK-CPM AquaSense E-Z Flush★ Best Overall | Most bathrooms, residential or commercial | Flushometer retrofit | Battery, motor gear driven | 1.5-inch inlet, flushometer compatible | Amazon |
| KERDE Touchless Toilet Flusher KitBudget Champion | Simple chain-pull tank toilets on a tight budget | Tank-mounted, wireless sensor | 4 AA batteries, 20,000+ flushes | Threaded inlet, 12+ inch sensing range | Amazon |
| GreatYYT USB Rechargeable Touchless FlusherBest for Recharging | Rechargeable convenience and water saving | Valve-mount sensor head | 2000mAh USB rechargeable | 1-inch inlet, compression fitting | Amazon |
| Toto THU765 Auto-Flush Unit | Matching an existing TOTO bidet setup | Toilet-specific flush kit | Wired into TOTO system | TOTO AQUIA and compatible bowls | Amazon |
| Sloan EBV-500-A Side Mount Retrofit | Busy commercial restrooms and urinals | Flushometer retrofit, side mount | Battery, ~3 year life at 4000 cycles/month | Side-mount, ADA compliant | Amazon |
| Zurn ZERK-CCP E-Z AquaSense | Fastest retrofit install, plastic-cover budget | Flushometer retrofit | Battery, motor gear driven | 2-inch inlet, flange connection | Amazon |
| American Standard Selectronic Flush Valve | Office and commercial flushometer bowls | Flushometer retrofit, piston type | 5-year CR-P2 lithium battery included | 1.5-inch inlet, 1-1/2″ top spud | Amazon |
| KOHLER K-1954-0 Touchless Toilet Flush Kit | Standard residential tank toilets | Tank-mounted sensor | 4 AA batteries, included | Canister and flapper toilets only | Amazon |
| Sloan G2 RESS-C Sensor Flushometer | Heavy commercial traffic and public facilities | Top-mount flushometer retrofit | Battery, 6 year rated life | Top-mount, 1.6/3.5 GPF | Amazon |
Detailed Reviews
1. Zurn ZERK-CPM AquaSense E-Z Flush Retrofit Kit
Our pick — 4.5+★ from 450+ verified ratings; the strongest balance of quality and price.
The chrome-metal retrofit that turns a tired flush handle into a hands-free sensor in minutes.
If your bathroom has an exposed chrome flush valve — the commercial-style pipe you press to flush — this is the kit to beat. It swaps the handle for a battery-powered infrared sensor head with a chrome-plated metal cover, and the business end is built from brass. Owners describe the install as a screwdriver-and-wrench job you can finish in an afternoon, and the sensor range is adjustable so you can tune it to a tight stall or a wide one.
What people talk about most is how straightforward the swap is, and how the bathroom feels upgraded once the handle is gone. You walk away and it flushes. The motor gear drive keeps water flow consistent flush to flush, so you are not standing there wondering whether it caught. As owners put it, “Keeps people from kicking the handle to flush” — and in a shared bathroom, that alone changes the whole experience.
One real limitation to plan around: the LED indicators are not visibly obvious, so you will not get a clear low-battery warning before it dies. Battery life is the part of this kit that owners describe inconsistently — most report long service, but it is worth keeping spare batteries on hand and checking the unit periodically. Think of it as a commercial-grade part that happens to fit perfectly in a home bathroom.
A retrofit that earns its keep
- Brass and chrome-plated metal construction — built for years of daily use, not a season
- Adjustable sensor range handles both tight stalls and open bathrooms
- Manual override button gives you on-demand flushing without waiting on the sensor
- Fits urinals and water closets from Zurn and other manufacturers
What to go in knowing
- The LED status lights are hard to read — you may not see a low-battery warning coming
- Battery life reports vary, so keep a spare set on hand
- Designed for flushometer valves — it will not fit a residential tank toilet
Best for: anyone with a flushometer toilet or urinal who wants the most proven touchless upgrade on this list.
Skip if: your toilet has a tank rather than an exposed valve — look at the KOHLER or KERDE kit instead.
2. KERDE Touchless Toilet Flusher Kit
A tiny wireless sensor you place wherever suits your bathroom — the catch is getting that placement right.
Here is the appeal: the sensor is not fixed to the tank. You get a wireless sensor head you can position freely near the toilet, which matters in awkward bathroom layouts where a fixed sensor would be blocked or worse, pointed at the door. It detects motion from more than 12 inches away and the maker rates it for over 20,000 flushes. You get both auto mode and a built-in flush button if you would rather trigger it by hand.
You save money with this entry-level model — it costs roughly a third of the top pick. It also takes up less space: it measures about 1.7 by 3.5 by 1.7 inches, while the Zurn measures 9 by 6 by 5 inches. So it hides next to the toilet instead of dominating it. It runs on four AA batteries (not included) and has an external battery box, so swapping batteries is quick.
The honest trade-off with this one is sensor placement — get it wrong and you will see inconsistent flushing. Buyers report the strongest results when the sensor is positioned carefully and tested before you commit to a spot, and a few found the flapper lift unreliable without fiddling. This is a prototype-it-until-you-find-the-spot product, not a bolt-it-on-and-forget product.
The case: smallest footprint on this list, a genuinely flexible sensor position, and a flush button fallback — plus it is the easiest of these to slot into a chain-pull lever toilet without special tools.
The honest read: reliability hinges on where the sensor ends up, and it has no adjustable sensor sensitivity dial to fine-tune it, so plan to experiment with placement before you mount anything permanently.
Reach for this if: you want the smallest, most affordable way to test whether touchless flushing suits your household.
Look elsewhere if: you need set-and-forget reliability — the valve-mount kits higher up this list are the safer bet.
3. Touchless Toilet Flusher
No AA batteries to hunt down — this one recharges over USB and offers a water-saving half flush.
The standout spec here is the 2000mAh lithium battery, which recharges over USB-C and, per the maker, holds a standby charge for up to 6 months and covers more than 6000 flushes on one charge. That means the battery-swap chore disappears entirely, which is the single biggest day-to-day annoyance this category has. The kit also carries a 1-year warranty and includes the double-stick mounting tape, smart base, and USB cable.
It fits a Toto toilet without needing the button divider removed, according to owners, and it handles two-button setups where the divider is present. There is also a thoughtful anti-false-trigger design — if something like a towel or clothes covers the sensor, the device will not fire. Both full flush and half flush modes are on offer, with the half flush intended to cut water use.
The honest catch is the half-flush programming: its default partial mode can make the full flush hard to trigger. Its default partial mode can make it hard to trigger the full flush, and the low flush is not actually as low as the name implies — fine for a septic system, less impressive if you are buying specifically to save water. Owners wished the partial flush could simply be switched off. This suits most standard chain-pull and two-button toilets, so measure your setup before ordering.
Where it shines
- USB-rechargeable 2000mAh battery means no AA scrambling
- Rated for over 6000 flushes on a single charge
- Anti-false-trigger design ignores objects over the sensor
- Installation is a few steps — tape, base, sensor, done
What tripped people up
- The default half-flush mode can be fussy to override for a full flush
- The “half flush” is not as small as the label suggests
- Will not suit every toilet — compression fitting is specific to certain valves
The rechargeable pick for tinkerers: ideal if you want to skip battery swaps entirely and like having a half-flush option for septic systems.
Before you buy: confirm your valve uses a compression fitting, because this unit will not drop into every toilet.
4. TOTO THU765 AUTO-FLUSH UNIT TYPE A DUAL FLUSH
A 10-minute, no-tools upgrade that finally gives your TOTO toilet the auto-flush your bidet was always ready for.
If you already own a TOTO bidet with auto-flush capability but your toilet tank never had it, this is the missing piece. It is a genuine TOTO part — model THU765, made of plastic, weighing 11.2 ounces — and it clips into the TOTO ecosystem so you are not fighting aftermarket tolerances. It handles the dual-flush behaviour of TOTO toilets rather than guessing at it.
The install steals the show. Owners describe it as needing no tools, finishing in about 10 minutes, and being well served by the printed directions plus TOTO’s own installation video. One long-term owner reports it has never failed. In a category where the biggest complaints are almost always sensor placement or wiring confusion, an upgrade that “just works” with clear instructions is worth calling out.
The trade-off is narrow compatibility. This is a TOTO-specific part, so it only makes sense paired with TOTO toilets and bidets like the AQUIA 4 with a Washlet. If you have a different brand of toilet, this will not be the right answer, and you should look at the universal kits. For the TOTO owner though, it turns a good smart-toilet setup into a genuinely complete one.
Right for the committed TOTO owner: the cleanest way to add auto-flush if you already have a TOTO bidet and AQUIA toilet.
Not for you if: your toilet is not a TOTO — the ecosystem-specific fit rules it out for other brands.
5. Sloan EBV-500-A Side Mount Sensor Retrofit Flushometer
The workhorse you install once and forget about for three years — even in a restroom nobody cleans.
If you run a business, school, or clinic, this is the pick that survives contact with the public. The side-mount retrofit converts an existing manual flushometer to touch-free operation, and it is ADA compliant. Its a neat extra is the 72-hour sentinel flush — it periodically flushes itself when nobody has used it, preventing stagnant water from sitting in the bowl. The infrared sensor adjusts its range automatically, which cuts down on the false activations that plague cheaper retrofits.
The rated battery life is three years at roughly 4000 cycles per month, which is a commercial duty cycle. When it does run low, a flashing LED lets you know before it fails. There is also a “User in View” flashing LED, a manual override full flush button, and the same polished chrome finish as the residential options. Owners describe the install as no harder than removing the original handle, and the brass body drives real confidence.
One real issue comes from high-traffic use: heavy abuse of the manual flush button can wear out its spring and plastic gear socket over time. There are no replacement parts sold separately, so a worn button means replacing the whole unit. For a restroom that gets leaned on hard, plan for that. For everything else, this is the most bulletproof retrofit you can bolt on.
What earned its spot: the 72-hour sentinel flush and auto-adjusting sensor make it the standout retrofit for high-traffic restrooms where a stale bowl or a false trigger is a real problem.
The honest caveat: the manual override button is not designed for heavy-handed abuse — use the sensor and it will outlast the building.
The commercial bedrock: buy it if a restroom needs hands-free flushing that will not fail, and you want set-and-forget battery life.
Think twice if: you expect to lean on the physical flush button every visit — that is the part most likely to wear.
6. Zurn ZERK-CCP E-Z AquaSense Retrofit Kit
The Zurn sibling with a plastic cover and the flattest install learning curve in the line.
This is the same Zurn E-Z Flush family as the top pick, with one meaningful difference: the cover is impact-resistant chrome-plated plastic rather than metal, and the inlet connection is 2 inches with a flange connector instead of the top pick’s 1.5-inch flushometer connection. That distinction decides which valve each kit drops onto, so double-check your valve body before you pick between them.
The Zurn party line is a sub-3-minute install, and owners back that up — several describe replacing manual flush handles across multiple locations in about 5 minutes each, even non-plumbers. The sensor range is adjustable, which matters because certain stalls need the sensor angled so a door swing does not trigger a flush. The tech is the same reliable motor gear driven operation as the metal-cover kit.
The plastic cover is the trade-off. If your bathroom is a hard-use commercial environment where a metal finish will take a beating better, the metal-cover Zurn is worth the extra. If your install is straightforward urinal work, the plastic cover does the same job at less risk to your knuckles if you drop it. It also fits urinals and water closets from Zurn and other manufacturers, so it is not locked into a single brand.
The fast-fit pick: for anyone who has a Zurn-compatible valve and wants the whole install done before their coffee goes cold.
Know before you order: if your valve uses a 1.5-inch flushometer connection rather than a 2-inch flange, this is the wrong Zurn kit — grab the metal-cover version.
7. American Standard Selectronic Toilet Flush Valve
The piston-type valve with a self-cleaning wiper spring that stops the slow drip other flushers develop.
The standout engineering here is DynaClean. An integral wiper spring cleans the refill orifice with every single flush, which is designed to prevent the valve run-on that slowly wastes water and annoys everyone. It fits flushometer bowls with a 1-1/2-inch exposed top spud and runs on a 5-year CR-P2 lithium battery that ships with the valve. A 5-year limited warranty backs it up.
For an office or commercial restroom, this is a straightforward, professional-looking upgrade. Owners who have installed it describe the conversion as easy, the sensor as responsive, and the chrome finish as durable. The touchless operation is the whole point in a shared facility — nobody has to touch a handle that dozens of people have used.
The honest catch is that this is a plumber-friendly install, not a plug-and-play one. It does not ship with every tool and fitting you might need, and getting the valve seated correctly takes a bit of confidence under the bowl. For a one-off home install, consider if you want to call a plumber. For a facility manager rolling it out across multiple stalls, the self-cleaning valve pays that effort back.
Solid engineering story: DynaClean’s self-cleaning wiper spring is a real differentiator — it targets valve run-on, which is among the most common complaints in this category.
Fit and skills note: this is a piston-type valve with a 1-1/2-inch top spud requirement — measure that spud before you order, and budget for plumbing help if you are not comfortable working on a valve body.
Suits the facility manager: buy it if you are adding touchless flush to multiple office or commercial stalls and want a valve that cleans itself.
Reconsider if: you want a screwdriver-only home upgrade — the KOHLER or KERDE tank kits are far easier for a single residential toilet.
8. KOHLER K-1954-0 Touchless Toilet Flush Kit
The one everyone tries first — a tank sensor that installs in under 20 minutes on most toilets.
This is the most tried-and-tested option of the batch, and for good reason: it installs in under 20 minutes on most toilets, hides a small sensor inside the tank, and works with most canister and flapper toilets. Batteries are included, so you can fit it and use it the same afternoon. The hands-free pull on the flapper is the same idea as the other kits, just executed inside the tank.
The install story is genuinely the best part. Owners describe following the included instructions plus Kohler’s own videos to get it done in about 20 minutes, and the foam pads smooth over small fit gaps on thicker tank lids. The sensor detects an object within an inch and pulls the chain when someone is there, so the flush fires on walk-away.
What to plan for is sensor care. Moisture from the tank, especially on toilets that splash onto the tank lid underside, can trip phantom flushes — owners solve it by adjusting the tank water level, tilting the cover, or adding a drip guard. The chain can also get caught if it is not routed cleanly. And this kit is strictly for standard canister and flapper toilets. It will not work with dual-flush, top-mount, pressure-assist, or ballcock valves, so check your tank type first.
Why it wins people over
- Sub-20-minute install on most standard toilets
- 4 AA batteries included — no extra shopping
- Motor pulls the chain when an object is within an inch
- Works with most canister and flapper toilets
Where it needs attention
- Condensation or splash on the sensor can cause phantom flushes
- The chain can catch if it is not routed carefully
- Not compatible with dual-flush, top-mount, pressure-assist, or ballcock toilets
The residential starting point: pick this if you have a standard tank toilet and want the widest-installed hands-free kit with the simplest install.
Not the one for: dual-flush or pressure-assist toilets — those need a valve-mount unit instead.
9. Sloan G2 RESS-C Sensor Water Closet Retrofit Flushometer
The six-year battery retrofit for facilities that cannot afford a stalled toilet — and would rather not climb the ladder.
This is the flagship retrofit on the list, and it is built for the restroom that never gets a break. The headlining spec is a 6-year rated battery life, which means you install it once and largely forget the swap cycle for the rest of a maintenance contract. It is a top-mount kit, so it replaces the flushometer head above the bowl rather than the side handle, and it runs at 1.6/3.5 GPF.
The sensor tech is genuinely different from the budget kit. Sloan uses multiple focused infrared sensor fields that read both high and low targets, so a tall person and a shorter person get reliable detection. There is a three-second flush delay so you are not startled mid-use, a low-battery flashing LED, a courtesy flush override button, and a handle cap included for a finished look. The brass body is built for years of hard service.
Two engineering details matter for the long haul. The diaphragm uses a flex tube design that is meant to extend its lifespan and cut maintenance visits, and it is molded from chloramine-resistant PERMEX rubber so treated municipal water does not chew through it. That makes it a smart pick for facilities where water treatment is aggressive. The trade-off is upfront cost and plumbing knowledge — this is a pro-grade valve, and while it comes with the parts to install, expect to need a plumber’s hands on a fresh retrofit.
The premium case: a 6-year battery, multiple-field sensor, chloramine-resistant diaphragm, and courtesy flush button make this the least fussy retrofit if you are managing a whole facility.
The honest cost: you are paying for long service life and pro-grade parts, and installation is a job for a plumber rather than a homeowner with a screwdriver.
Choose it for commercial longevity: worth it if you are retrofitting a public restroom or facility and want the lowest maintenance frequency.
Pass on it: if you are upgrading a single home toilet — the cost and install complexity do not pay off on one bowl.
Know the Specs
Sensor type and range
Infrared sensors are the standard here — they fire a beam and look for movement. Range matters because a sensor set too wide triggers when someone walks past, and one set too narrow misses a user. Adjustable range (Zurn and Sloan offer it) gives you control. Multiple-field sensors like Sloan’s G2 RESS-C read high and low targets, so detection is more reliable across different body types.
Power and battery life
Most kits run on AA batteries, but some use a rechargeable 2000mAh cell (GreatYYT) or a CR-P2 lithium pack with a 5-year rating (American Standard). Rated battery life varies wildly — Sloan claims 3 years at 4000 cycles a month for the EBV-500-A and 6 years for the G2 RESS-C, while one owner of a rechargeable kit reports 6 weeks of constant use. The cycle count, not the years, is the real number to watch.
Compatibility and connection size
The inlet connection size and type decide whether a retrofit physically fits. Zurn kits ship with 1.5-inch flushometer and 2-inch flange options; American Standard and Sloan target 1-1/2-inch top spud bowls; tank kits like Kohler’s need a canister or flapper toilet. Order the wrong fit and it will not seat regardless of how good the sensor is.
Manual override and safety features
A manual override button lets you trigger the flush when the sensor or battery falters — Sloan includes a courtesy flush button and Zurn kits have on-demand manual flushing. Sentinel flushes (Sloan’s 72-hour feature) keep water moving in unused bowls so stagnation does not build up. ADA compliance on the Sloan EBV-500-A matters in public restrooms.
Common Questions
Will an automatic toilet flusher fit my toilet?
How long do the batteries last in an automatic flusher?
Can I install a touchless flusher myself or do I need a plumber?
Why does my touchless flusher trigger when nobody is there?
What is a sentinel flush and do I need it?
Can an automatic flusher work on a dual-flush toilet?
How much water does a touchless toilet flusher use compared to a manual flush?
What happens if the automatic flusher’s battery dies mid-use?
Do automatic flusher kits work in both homes and commercial restrooms?
Is an automatic toilet flusher worth buying for a home bathroom?
The Bottom Line
For most people, the best automatic toilet flusher winner is the Zurn ZERK-CPM AquaSense E-Z Flush because it pairs a metal-cover sensor head with adjustable range, a manual override, and the most-installed Zurn retrofit design — it is the one the crowd rates highest at 4.5+ stars. That said, if you want the easiest possible home install, the KOHLER K-1954-0 is a fit-and-forget tank kit for standard toilets. And if you are upgrading a busy commercial restroom where battery swaps are the last thing you want, the Sloan G2 RESS-C is the one to reach for, with a 6-year battery life and chloramine-resistant diaphragm. Whichever kit suits your valve, the moment you stop touching a handle, you will wonder why you waited.
How we choose
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of October 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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