TOTO SW502#01 B100 Washlet for Elongated Toilet Bowl

Let’s be honest: the modern bathroom is basically a tiny spa… until you’re stuck with cold paper and regret.
The TOTO SW502#01 B100 Washlet is one of those “why didn’t I do this sooner?” upgrades
a warm-water cleansing seat made for an elongated toilet bowl, with a heated seat and simple
side-panel controls that don’t require a user manual, a Wi-Fi password, or a degree in button archaeology.

This article is a practical deep-dive into what the B100 does well, what it doesn’t do (important!), and how to
figure out whether it will actually fit your toilet before you start unbolting anything. Along the way, we’ll talk
features, compatibility, installation, maintenance, and what daily life feels like after you switch teams from
“paper-only” to “warm-water comfort.”

What the B100 Is (and What It Isn’t)

The B100 is an electric bidet seatwhat TOTO calls a Washletdesigned to replace your existing elongated toilet seat.
It delivers warm-water cleansing through a retractable wand, offers adjustable temperature and pressure, and adds
a heated seat so winter mornings don’t feel like a personal attack.

Just as important: the B100 is intentionally straightforward. You get a side control panel (not a remote), core wash
functions, and energy-saving modes. You don’t get every premium extra that higher-tier models may include, such as:

• Personalized user presets (the B100 is more “set it and forget it”)
• Auto-open/close lid or motion features (your toilet is not going to greet you like a butler)
• Fancy ambient lighting (the B100 won’t moonlight as a nightlight)

Quick Specs at a Glance

If you love numbers, here are the ones that matter most when shopping and planning installation:

• Fit: Elongated toilet bowls
• Power: 120VAC / 60Hz (standard U.S. outlet), grounded 3-prong
• Rated power consumption: 313W
• Product dimensions: approximately 18.9" W × 20.6" D × 6.8" H
• Weight: about 10.6 lbs
• Water pressure requirement: about 7–110 psi
• Power cord length: about 3.9 ft
• Warm-water system: tank-style (warm water accumulation type)

Key Features That Actually Matter Day-to-Day

1) Rear, Front, and “Soft” Cleansing (with Oscillation)

The B100 covers the essentials: rear cleansing, front cleansing (bidet function), and a soft cleansing mode that
uses gentler pressure. Each mode includes an oscillation option, which moves the spray back and forth for broader
coverage. Translation: less “laser-pointer precision,” more “ahh, that’s the spot.”

2) Adjustable Water Pressure (5 levels)

The control panel lets you adjust water pressure across five levels. That’s a big deal for comfort because bidets are
not a “one-pressure-fits-all” situation. First-timers usually start low, then gradually bump it up once the surprise
factor wears off.

3) Adjustable Temperature for Water and Seat (3 levels each)

You can adjust warm water temperature and seat temperature independently across three levels,
plus turn each heater off. The warm-water range is roughly in the mid-90s to low-100s °F, and the seat heater can be set
from “off” to comfortably warm. In practical terms: you can stop arguing with your bathroom about whether it’s July or January.

4) Self-Cleaning Wand + “Wand Cleaning” Function

Hygiene is the whole point, so the wand matters. The B100’s wand retracts when not in use and automatically cleans itself.
There’s also a dedicated wand-cleaning function so you can extend the wand (without spraying) for easier maintenance.
It’s the kind of feature you’ll appreciate the first time you realize you don’t want to “just eyeball it.”

5) Energy-Saving Modes (Auto + Timer)

The B100 includes auto energy-saving and timer-based energy saving. Auto mode learns when the toilet is used less frequently
and reduces seat temperature to save energy. The timer mode can turn the seat and water heaters off for a set period
(commonly 6 or 9 hours), which is handy if your household keeps predictable hours.

6) Comfort and Materials: Ergonomic Seat, Soft-Close Behavior, Antibacterial Plastics

The seat is contoured for comfort, and the lid/seat close gently (temperature can affect closing speedso it may feel a touch
slower in winter). Many listings and product descriptions also emphasize antibacterial materials and anti-microbial agents
aimed at inhibiting odor-causing bacteria and mildew. It’s not a substitute for cleaningbut it is a nice “help me help you”
bonus for a high-traffic bathroom.

Will It Fit Your Toilet? Compatibility Checklist

“Elongated” is necessary, but it’s not always sufficient. The biggest installation heartbreaker is tank clearance
the space behind the mounting bolt holes. Some toilets have curves or bulky tank profiles that crowd the seat.

Measure these before you buy

• Bowl type: elongated (not round). If your bowl is round, this specific model is the wrong shape.
• Tank clearance: you generally want about 2 inches from the front face of the tank to the
  center of the mounting bolt holes (for standard toilets without tricky contours).
• Side clearance: plan for roughly 11 inches of open space from the centerline to the edge
  of nearby obstacles (walls/vanity) so the seat and controls aren’t cramped.
• Outlet reach: the power cord is about 3.9 feet. Measure from a grounded outlet to the seat area.

Pro tip: if your toilet has a “sculpted” shape where the tank and seat almost touch, do not assume it will fit.
The B100 is designed to work with many standard elongated toilets, but certain contours can cause interference.
Measuring up front is cheaper than buying new swear words mid-installation.

Installation: What to Expect (and How to Avoid Regret)

Most homeowners with basic tools can install the B100 in under an hour. You’ll typically connect a T-valve at the toilet’s
shutoff line, run a water supply hose to the Washlet, mount a base plate, slide the unit into place, and plug it into a
grounded outlet. That’s itno wall demolition required.

Basic installation steps

1. Turn off the water shutoff valve and flush to relieve pressure.
2. Remove your existing toilet seat.
3. Install the base plate and mounting hardware.
4. Attach the T-valve and connect the Washlet’s water supply hose.
5. Slide the Washlet onto the base plate until it clicks securely.
6. Turn water back on and check for leaks.
7. Plug into a grounded 3-prong outlet and power on.

Common install pitfalls (so you don’t get “surprised water”)

• Over-tightening: tighten hose connections as directedsome connections are meant to be hand-tight.
• Outlet shortcuts: avoid adapters or ungrounded outlets. This is an electric appliance near water.
• Seat not fully seated: if the unit isn’t clicked into the base plate, it can wobble or shift.
• Ignoring tank clearance: if your toilet’s shape crowds the seat, you may need a different model or toilet.

How It Feels to Use (Because Specs Don’t Tell the Whole Story)

The first-time learning curve is realbut short. You sit down, the seat sensor activates, and then you choose your function.
If nothing happens, the most common reason is simply posture: many Washlets want you seated back enough for the seat sensor
to detect you. (Yes, the toilet is judging your form.)

First-week settings that keep things comfortable

• Start with low pressure: levels 1–2 are friendlier while you adjust.
• Use medium temperature first: “warm” is nice; “hot” is… a commitment.
• Try oscillation: it can feel more natural and less targeted.
• Keep a small amount of toilet paper: most people still pat dryless paper, not necessarily zero paper.

One practical note: cleansing functions typically stop automatically after several minutes of continuous use.
That’s both a safety feature and a gentle reminder that this isn’t a car wash.

Cleaning and Maintenance: Easy If You Do the Small Stuff

The B100 is built to be maintainable without turning your bathroom into a science lab. The lid can be removed, and the
Washlet can be removed from the base plate with a one-touch operation to make cleaning easier.

What to clean (and how often)

• Seat and lid: wipe regularly with a soft cloth and mild, diluted dish detergent.
• Wand area: use the wand-cleaning function and wipe gentlyno abrasive pads.
• Water filter screen: if water pressure weakens, clean the filter as directed (this is a common “fix”).

What not to do (unless you enjoy cracked plastic)

• Don’t use toilet bowl cleaner, harsh household cleaners, benzene, paint thinner, powdered cleansers, or scrubbing pads on the seat.
• Don’t spray water directly onto the main unit or electrical plug.
• Don’t reuse old hose setsuse the new hose set included with the unit.

Troubleshooting: The Fastest Fixes

Most issues fall into a few predictable buckets. Here’s the “save your sanity” shortlist:

• Nothing happens when you press buttons: confirm the unit is powered on and the seat sensor is activated (sit back).
• Water isn’t warm: check if the water heater setting is off or lowered; energy-saving mode may be active.
• Weak spray: increase pressure level and clean the water filter screen if needed.
• Random drips: small drips can happen as the wand drains or as warmed water expandscheck the manual guidance and fittings.
• Leaks: shut off the valve and re-check connections (don’t just “tighten everything forever”).

Is the TOTO SW502#01 B100 Still Worth It?

Here’s the honest take: the SW502#01 B100 is often listed as discontinued, which means availability can vary and you may see it sold as remaining stock
or through select retailers. If you find it at a good price and you want a reliable, no-fuss warm-water Washlet with a heated seat, it can still be a
strong valueespecially for a guest bath or a household that doesn’t care about premium extras.

If you’re the kind of person who wants the newest features, it may be worth comparing with current Washlet seats in TOTO’s lineup
(and similar models from other brands). Newer seats can add conveniences like more advanced controls, additional comfort features,
and updated designsbut the B100’s core promise remains the same: warm-water cleansing and a more comfortable daily routine.

Final Thoughts

The TOTO SW502#01 B100 Washlet is a classic for a reason: it focuses on the features that improve your day
immediatelywarm cleansing, adjustable pressure, a heated seat, and straightforward controlswithout turning your bathroom into a gadget showroom.
If your toilet is elongated, you’ve got the right clearances, and you have a grounded outlet within reach, the B100 can be the upgrade that makes
every other bathroom feel… a little uncivilized.

Real-World Experiences: of “Okay, This Is Different”

The first experience most people have with the B100 is the same: curiosity, then a tiny moment of panic, then a weirdly fast sense of,
“Wait, why isn’t this just normal?” That’s because a Washlet changes the bathroom routine in a way that’s hard to understand until you’ve used it
for a week. It’s not dramatic like remodeling a kitchen. It’s more like upgrading from a squeaky shopping cart to one that actually rolls straight.
Suddenly, you notice the old way was… unnecessarily difficult.

In the first couple of days, the controls become muscle memory. You learn that low pressure is your friend while you’re figuring things out,
and that medium temperature feels “pleasant” while high temperature feels “I have made a bold life choice.” You also discover that oscillation is
one of those features you didn’t know you needed until it’s thereless targeted, more forgiving, and surprisingly comfortable when you’re not in the
mood for precision engineering.

Then comes the cold-weather moment. The heated seat is the feature people laugh at… until they try it. There’s a very specific kind of joy in
sitting down on a warm seat on a chilly morning, especially in bathrooms with tile floors that seem designed to store winter in their pores.
It’s not just comfortit’s the absence of discomfort. And that’s the kind of luxury you start craving in other parts of life.

A week in, your relationship with toilet paper changes. Most folks still keep it around for a quick pat dry, but the volume drops.
That leads to an odd realization: you’re not “using a bidet,” you’re just… cleaner. It feels less like “an extra step” and more like a smarter default.
Guests, of course, are their own storyline. The brave ones press buttons. The cautious ones ask questions from a safe distance.
And at least one person will treat the control panel like it’s about to launch a rocket. (Start them on low pressure. Be kind.)

The B100 also teaches you small practical habits. You learn to sit back so the seat sensor engages (no activation, no spray).
You learn that if the spray feels weak, it might not be “broken”it might just be time to clean the filter screen.
You learn that gentle cleaning products matter, because harsh bathroom chemicals and plastic parts are not best friends.
None of this feels like work; it feels like owning a tool you actually use.

Finally, there’s the quiet, long-term experience: you stop thinking about it. That’s the best compliment.
The Washlet becomes a background upgradelike good insulation or a dishwasher that doesn’t sound like a motorcycle.
You only notice it when you’re away from home and realize other bathrooms suddenly feel like they’re missing an entire chapter of civilization.
At that point, the B100 isn’t a “bathroom gadget.” It’s just the way you prefer to live.