If you’ve been Googling bidets lately, you’ve probably seen the TOTO C100 (SW2034) everywhere. It’s the “classic” choice—the one your cousin or your neighbor probably has.
But it’s 2026 now. TOTO Smart Toilet has released newer, slimmer models like the C2 and the S5. So, is the C100 still a smart buy, or are you just buying “yesterday’s tech”? I’ve spent time looking at what people are actually saying on Reddit and comparing it to the new 2026 models to give you the truth.
The “Quick Look” Verdict
Buy the TOTO C100 if: You want a bidet that is easy for kids or seniors to use (thanks to the big side buttons), you’re on a budget, and you don’t mind a “bulky” look.
Skip it if: You have a “skirted” toilet (the kind with smooth sides), you have a very tiny bathroom, or you hate the idea of the warm water running out after 40 seconds.
Why Everyone Still Loves (and Hates) the Design
The first thing you’ll notice about the C100 is the side control panel.
- The Good: You never have to worry about losing a remote or changing batteries. For older family members, having the buttons right there on the side is way more intuitive.
- The Bad: It makes the seat look wide. If your toilet is tucked into a tight corner or near a vanity, that control arm might actually hit the wall. Measure your space before you buy!
Also, because this model uses a water tank to keep things warm, the back of the seat is quite tall (about 6.5 inches). It makes your toilet look a bit like a “throne.”
The “40-Second” Reality Check
Most reviews just say “warm water.” But here is the fact: the C100 has a small heated tank inside.
- How it feels: You get about 35 to 40 seconds of perfect, spa-like warm water.
- The “Oops” Moment: If you’re a “long-session” type of person, that water will start to get chilly after the 40-second mark.
In 2026, newer models like the TOTO S5 have “instant heating” (unlimited warm water), but they cost twice as much. For most people, 40 seconds is plenty.
The Feature That Actually Saves You Work: PreMist
This is TOTO’s secret weapon. Every time you sit down, the bidet sprays a fine mist of water onto the dry ceramic bowl.
- Why it matters: Wet ceramic is slippery. It stops “stuff” from sticking to the bowl.
- The Result: You’ll find yourself reaching for the toilet brush way less often. It sounds like a small thing, but it’s a total game-changer for whoever cleans the bathroom.
Will it Fit Your Toilet?
This is where many people get stuck. If your toilet has smooth, flat sides (called a skirted toilet), the standard bolts that come with the C100 won’t work. You’ll need to buy a special kit called the TOTO THU9090R Top Mount Bolt Kit.
Pro Tip: If your toilet has the “swirly” visible pipes on the side, you’re fine. If it’s smooth like a car door, buy the extra bolt kit now so you aren’t frustrated on installation day.
2026 Comparison: C100 vs. The New Kids
| Feature | TOTO C100 | TOTO C2 (2025/26) | TOTO S5 (Premium) |
| Control Style | Side Panel (Fixed) | Side Panel (Slimmer) | Wireless Remote |
| Water Heat | 40-sec Tank | 40-sec Tank | Unlimited (Instant) |
| Height | 6.6 inches (Bulky) | 5.8 inches | 4.8 inches (Sleek) |
| Electricity Cost | ~$45/year | ~$40/year | ~$30/year |
Common Complaints (What the Manual Doesn’t Tell You)
- The Noise: The “Deodorizer” fan turns on the second you sit down. It’s not loud, but it sounds like a computer fan. If you’re using the bathroom in the middle of the night, it might feel a bit noisy.
- The Push-Forward: Because of the tank at the back, the seat pushes you about an inch forward. If you are a tall man, it might feel a little “cramped” compared to a normal seat.
Final Thoughts
Yes. Even though there are fancier models out there, the TOTO C100 remains the “Toyota Camry” of bidets. It’s reliable, it’s built like a tank, and it gets the job done without making you learn a complicated remote.
It will save you a fortune on toilet paper (especially for a family), and once you get used to that heated seat in the winter, you’ll never want to go back to a “regular” toilet again.
FAQs
1. Does it fit any toilet?
It fits most standard two-piece toilets. Warning: If your toilet has smooth, flat sides (skirted), you must buy the TOTO THU9090R bolt kit separately.
2. How long is the warm water?
About 40 seconds. It uses a reservoir tank. If you need “unlimited” hot water, you’ll need a more expensive “instant-heat” model like the TOTO S5.
3. Do I need a plumber?
No. It’s a 20-minute DIY job. You only need a screwdriver and a nearby GFCI outlet. All plumbing connectors are included in the box.
4. Is it hard to clean?
No. The nozzle self-cleans before and after every use. The “PreMist” feature also sprays the bowl to prevent waste from sticking, reducing your scrubbing time.
5. Is the C100 outdated in 2026?
It’s a “Legacy” model. While the newer TOTO C2 is slimmer, the C100 is usually $100 cheaper and just as durable, making it the best budget choice this year.
