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The TOTO Washlet A100 is one of the easiest ways to upgrade an ordinary toilet without replacing the entire fixture. If you are new to bidet seats and want warm-water cleansing, a heated seat, and simple controls at a friendly price, the A100 is designed to deliver exactly that. In this review, you will learn what the A100 does well, where it falls short, how it compares with TOTO’s step-up models, and whether it’s the right choice for your bathroom.
What Is the TOTO Washlet A100?
The TOTO Washlet A100 is an entry-level electric bidet toilet seat that replaces your existing toilet seat and connects to your home’s water supply and a nearby electrical outlet. It adds warm-water cleansing, a heated seat, and a few comfort features, all controlled by an attached side panel. It focuses on fundamentals rather than extras, making it beginner-friendly and reliable for everyday use.
Who Is It For?
The A100 suits anyone who wants a straightforward, hygienic upgrade without paying for advanced features like air deodorizers, warm air dryers, or app-connected remotes. It is especially good for first-time bidet users, guest bathrooms, rental upgrades (where replacing the whole toilet is not possible), and households that value dependable performance over bells and whistles.
Key Features at a Glance
Warm-Water Cleansing
The A100 provides warm water for rear and front cleansing. It uses a tank-style heater, which preheats and stores water. This design is dependable and cost-effective, though warm water is not endless. For typical use, it is enough, but on longer washes the temperature may taper off slightly.
Front and Rear Wash Options
Two wash modes target different needs: a rear cleanse and a gentler front cleanse. The spray is aerated for comfort. You can adjust water pressure and nozzle position so the stream hits where you want it, which is helpful for new users finding their ideal setting.
Adjustable Temperature and Pressure
You can control both the water temperature and the water pressure. This customization is handy for households with multiple users or sensitive skin. The adjustments are simple and done from the side panel, with clearly labeled buttons.
Heated Seat with SoftClose
The heated seat is one of the immediate quality-of-life upgrades most people notice, especially in cold months. Temperature is adjustable, and the SoftClose seat and lid prevent slamming, preserving the hinges and keeping noise down at night.
Self-Cleaning Wand
The cleansing wand self-rinses before and after each use to help maintain hygiene. While it is not a replacement for periodic cleaning, this automatic rinse reduces buildup and keeps maintenance easier over time.
Quick-Release Seat for Easy Cleaning
The seat can be detached from its mounting plate with a simple release. This allows you to clean the hard-to-reach area between the seat and the bowl in seconds, which is a meaningful perk for day-to-day bathroom upkeep.
Side Control Panel
The A100 uses an attached side panel with physical buttons. It is always there, never misplaced, and easy to learn. There is no remote control to pair or battery to replace. The panel is straightforward but not backlit, so in a dark bathroom you may rely on muscle memory or a small night light.
Energy Saver Mode
An energy-saving mode reduces power use when the seat is not in active use. For many households, this keeps the electric cost modest while still providing warm water and a warm seat when needed.
Comfort and Cleaning Performance
In daily use, the A100 feels comfortable and predictable. The aerated spray is gentle but effective, and the adjustable nozzle position helps with precision. Most users find the water temperature range adequate. Because it uses a tank heater, very long washes can cool off slightly, but typical sessions remain warm. The seat comfort is good for an entry-level model, and closing the lid is nearly silent thanks to SoftClose. The overall experience is a small luxury upgrade that quickly becomes part of your routine.
Installation and Compatibility
What You Need
Most DIYers can install the A100 in about 30 to 60 minutes. You will need a standard adjustable wrench and a Phillips screwdriver. The Washlet includes the mounting plate, a T-adapter for the toilet’s water supply, and the supply hose. You will need a nearby grounded GFCI electrical outlet. If your bathroom does not have one, consider hiring a licensed electrician for safety and code compliance.
Toilet Fit and Measurements
The A100 comes in versions to fit common elongated and round toilets. For the best fit, check that your toilet has standard mounting bolt spacing and at least a bit of flat porcelain space between the bolt holes and the tank. Most two-piece toilets fit; some one-piece “French curve” designs may not. TOTO provides compatibility charts, and it is worth checking those before purchasing.
Water Connection
The A100 connects to the same water line that fills your toilet tank. The included T-adapter installs at the bottom of the tank on the fill valve (typical US toilets use a 7/8-inch ballcock thread). Turn off the water, drain the tank, install the adapter, and route the braided hose to the seat. Make hand-tight connections first, then snug with a wrench without over-tightening.
Power and Safety
Plug the Washlet into a GFCI-protected outlet. Avoid extension cords. The cord usually exits on the left side of the seat (when facing the toilet). If your outlet is far, plan a discreet, code-compliant solution beforehand. Keep the connection dry and avoid routing the cord where it can be pinched.
Day-to-Day Use and Controls
Learning the Buttons
The side panel shows clearly labeled buttons for rear wash, front wash, stop, water pressure, water temperature, and seat temperature. Most users get comfortable with it after one or two uses. There are no user presets; you simply press your preferred settings each time.
Everyday Comfort
Heated seats are an underrated comfort feature. The A100 warms quickly and keeps a stable temperature. The wash starts smoothly, and the self-clean function runs without you needing to think about it. Because the panel is always attached, guests can easily find the controls.
Nighttime Considerations
There is no built-in night light or backlight on the buttons. If your bathroom is dark at night, consider adding a small plug-in night light near the outlet so you can see the panel without turning on bright overhead lighting.
Cleaning and Maintenance
Routine Cleaning
Wipe the seat and lid with a soft cloth and a mild, non-abrasive cleaner. Avoid bleach and harsh chemicals that can damage plastic. Use the quick-release to lift the seat off the mounting plate for a thorough wipe around the hinges and bowl edge.
Nozzle Care
The nozzle self-rinses, but you can also extend it for manual cleaning according to the manual. A soft brush or cloth is enough. Do not force or twist the wand. If your water is hard, periodic cleaning can prevent mineral buildup around the spray openings.
Water Filter and Hoses
Some installations may benefit from an inline strainer or checking the small screen at the water inlet for sediment. If your home has older pipes or sediment issues, consider a simple external filter to protect the valve and nozzle from clogging over time.
Water and Energy Use
Water Consumption
A single wash uses a modest amount of water. For most households, the increase is small and often offset by reduced toilet paper usage. The spray is efficient and designed to use only what is needed to cleanse effectively.
Electricity Use
The seat and water tank heater draw power to maintain temperature. Energy saver modes help cut usage when not in use. If you are very energy-conscious, you can turn the heater down during the day and bump it up in the evening, or use the energy saver schedule if your model has one. In typical homes, the monthly cost is small, often a few dollars.
Noise and Build Quality
Quiet Operation
The Washlet operates quietly. The water valve click and the gentle hum during the spray are subtle and unlikely to wake a sleeping household. The SoftClose hinges prevent lid slams, which also helps with nighttime peace.
Materials and Durability
The plastics feel solid for the price point, and the hinge action is smooth. The attached side panel is sturdy and practical. With basic care and periodic cleaning, the A100 should provide years of reliable service. TOTO’s reputation for durable plumbing products adds confidence here.
Pros
Beginner-Friendly Controls
The side panel has clear, labeled buttons. There is no remote to lose, no pairing, and minimal learning curve. Guests understand it immediately.
Warm-Water Cleansing and Heated Seat
These are the two features that make a bidet seat feel like a true upgrade. The A100 delivers comfortable warm water and an adjustable heated seat at an accessible price.
Self-Cleaning Wand and Quick-Release Seat
The auto-rinse wand and easy removal design keep maintenance simple, which is important for households that want hygienic results with minimal effort.
Reliable, Well-Known Brand
TOTO is a global leader in toilets and bidet seats. Replacement parts and support are easier to find compared with many off-brand models.
Good Value for Essentials
The A100 delivers the core experience of a Washlet without the cost of advanced extras. For many buyers, the essentials are all that matter.
Cons
No Warm Air Dryer
There is no built-in air dryer. You may still use a small amount of toilet paper to pat dry. If you want a hands-free dry, you will need to step up to a higher model.
No Deodorizer or Bowl Premist
The A100 does not include an air deodorizer or pre-misting of the bowl. If odor control and reduced sticking are priorities, consider TOTO’s C-series or higher models that add these features.
Tank Heater Means Limited Warm Water
Warm water is comfortable for typical use, but on longer cycles the temperature can gradually cool. Instant water heaters on premium models avoid this, but cost more.
No Remote, No Backlit Buttons
The attached panel is handy, but it is not backlit and you cannot place it elsewhere. People who prefer a handheld remote should look at step-up models.
Basic Feature Set Only
If you want oscillating or pulsating spray patterns, user presets, or a night light, you will need a higher model. The A100 focuses on fundamentals and keeps the extras to a minimum.
Tips to Get the Most From an A100
Dial In Your Settings
Spend a few uses fine-tuning the water pressure, temperature, and nozzle position. Once you find your preferred settings, using the Washlet becomes second nature.
Use Energy Saver Wisely
Set energy saver during hours when the bathroom is less used. You will keep the electric bill down while still enjoying a warm seat when you typically need it.
Plan for a Night Light
Because the panel is not backlit, a small plug-in night light by the outlet makes nighttime use much easier without harsh overhead lighting.
Keep Cleaning Simple but Regular
Wipe the seat weekly, detach it monthly for a quick deep clean around the hinges, and check the nozzle periodically. This routine keeps the Washlet fresh and working like new.
A100 vs. TOTO C100/C2 and Higher-End Models
What the A100 Leaves Out
Compared with TOTO’s C100/C2 and above, the A100 omits features like a warm air dryer, air deodorizer, and typically the bowl premist function. It also lacks a remote control, advanced spray patterns, and instant water heating found on premium lines.
Where the A100 Still Shines
If you mainly want warm-water cleaning, a heated seat, and a trustworthy brand, the A100 nails the fundamentals at a lower cost. The side panel is simple and dependable, and the tank heater provides consistent performance for everyday washes.
If You Are Considering an Upgrade
Step up to the TOTO C100 or C2 if you want a warm air dryer, deodorizer, and often premist for bowl cleanliness. Jump to the S-series for a sleeker design, instant water heating, advanced controls, and more customization. The choice depends on your priorities: price and simplicity versus extra comfort features.
Value and Alternatives
Who Gets the Best Value from the A100
Households that want a trusted brand and the most important bidet functions without paying for extras get excellent value from the A100. It is a practical buy for guest bathrooms and for first-time users who want to try a Washlet before investing in a higher-end model.
Alternatives to Consider
If you want more features at a modest price bump, look at TOTO’s C100/C2. If you want a remote, deodorizer, and dryer, the C5 or S-series is worth it. Outside of TOTO, budget seats from Brondell or Bio Bidet sometimes add features like oscillation or a night light, but long-term support and parts availability can vary. Sticking with TOTO often means easier service over time.
Installation Snapshot for DIYers
Step-by-Step Overview
Turn off the water supply and flush to empty the tank. Remove the old seat. Install the mounting plate using the existing bolt holes. Add the included T-adapter at the toilet fill valve. Connect the Washlet hose to the T-adapter, then slide the Washlet onto the mounting plate until it clicks. Turn water back on, check for leaks, and plug the unit into a GFCI outlet. Test the seat, water temperature, and spray. Most people can do this without a plumber, but if you are unsure about the outlet or water fittings, a pro can help.
Warranty and Support
Peace of Mind
TOTO typically offers a limited residential warranty on Washlets and has a strong support network. Always register your product and keep your receipt. Using gentle cleaners and avoiding damage to the wand ensures your warranty stays intact. If you ever need parts, TOTO’s wide distribution helps you get replacements faster than many off-brand options.
Conclusion
The TOTO Washlet A100 is a smart, beginner-friendly bidet seat that focuses on the essentials: warm-water cleansing, a heated seat, and simple, reliable controls. It is not loaded with extra features, and that is the point. By keeping the design straightforward and the price reasonable, TOTO delivers a comfortable daily upgrade that is easy to install, simple to maintain, and pleasant to use.
Choose the A100 if you want core Washlet comfort from a trusted brand at a fair price. If you prefer a built-in dryer, deodorizer, premist, or a remote, consider stepping up to TOTO’s C-series or S-series. For many people, though, the A100’s clean basics are exactly right—and once you get used to them, you will wonder how you lived without them.