Toto Washlet S2 vs Bio Bidet BB-1000 Supreme
Quick take: The Toto Washlet S2 costs $10 less; the Toto Washlet S2 heats water via tankless (instant heat) while the Bio Bidet BB-1000 Supreme is tank heater.
| Spec | Toto Washlet S2 | Bio Bidet BB-1000 Supreme |
|---|---|---|
| Price | $349 | $359 |
| Rating | 4.8★ (5) | 4.4★ (4,000) |
| Type | Electric Bidet Seat | Electric Bidet Seat |
| Water Heating | Tankless (Instant Heat) | Tank Heater |
| Controls | Side Control Panel | Wireless Remote |
| Toilet Fit | Elongated & Round versions | Elongated & Round versions |
| Power | Needs GFCI outlet within 4 ft | Needs GFCI outlet within 4 ft |
| Spray Pressure | 5 pressure levels | Adjustable, class-leading strength |
| Nozzle | Self-cleaning EWATER+ wand | Stainless 3-in-1 nozzle |
| Install | 30-45 min DIY | 30-45 min DIY |
| Warm water | Yes | Yes |
| Heated seat | Yes | Yes |
| Warm air dryer | Yes | Yes |
| Wireless remote | No | Yes |
| Night light | Yes | No |
| Deodorizer | Yes | Yes |
| Self-cleaning nozzle | Yes | Yes |
| Feminine wash | Yes | Yes |
| Warranty | 1-year limited | 3-year full |
Pros & cons
Toto Washlet S2
- ✓Instant heating fixes the old C2's biggest complaint — that tank ran lukewarm after roughly 35-45 seconds and the second user in a shared bathroom got cold water; the S2 stays warm indefinitely
- ✓At $348 street (Home Depot) it's the cheapest ticket into TOTO's EWATER+ system, which sanitizes the wand with electrolyzed water before and after every wash — rivals at this price rinse the nozzle with plain water
- ✓PREMIST wets the bowl before you sit, which measurably reduces waste sticking — owners report scrubbing the bowl about half as often
- ✓19% slimmer than the C2 it replaces, so it no longer looks like a fax machine bolted to your toilet
- ✓Warm-air dryer, deodorizer, and night light are all included — the old C2 had no night light, and Brondell's similarly-priced LE99 drops the deodorizer entirely
- ✓Ditching the always-on tank cut standby power draw; eco mode plus on-demand heat makes it cheaper to run than tank seats left plugged in 24/7
- ✓TOTO's docking-station install is genuinely 30-minute DIY — the seat slides off one bracket for deep cleaning and the included tee fits standard 7/8-inch supply lines
- ✓Both elongated and round versions at the same price — fit flexibility the home-center KS6 sibling doesn't offer
- ✗The side arm panel adds about two inches of width — in a narrow alcove it can pinch against a vanity, and unlike the S5 there's no way to add a remote later
- ✗No user presets: you re-dial pressure, position, and temperature every visit, while the S5/KS6 remote stores four personal profiles
- ✗The 1,273-watt instant heater demands a dedicated GFCI outlet and the cord is only 3.9 ft — budget for an electrician if your outlet is across the room
- ✗TOTO's dryer remains the gentlest in the business — owners consistently report 60+ seconds of lukewarm breeze for a job a square of paper finishes in five
- ✗One-year warranty is stingy next to the 3-year full coverage Bio Bidet puts on similarly-priced seats
- ✗Launched summer 2025, so there's no long-term reliability record — the C2's decade of proven durability doesn't automatically transfer to the new tankless platform
- ✗Spray tops out gentler than Korean rivals — r/bidets regulars who want serious pressure point buyers to a Bio Bidet instead of any TOTO
- ✗List price is $780 and some retailers ask near it — Home Depot and Amazon routinely sell the same seat for $350-430, so never pay list
Bio Bidet BB-1000 Supreme
- ✓Same pump-driven vortex/enema wash as the $470 BB-2000 — longtime r/bidets pick for strong spray on a budget, regularly dipping to $299 with coupon codes
- ✓The 3-in-1 stainless-casing nozzle with a replaceable tip means years-old units are still serviceable with cheap parts
- ✓Wall-mountable remote with light-up indicators is simple enough that reviewers routinely buy this model for elderly parents
- ✓Full 3-year warranty (100% parts and labor) — double or triple what most sub-$400 competitors offer
- ✓A decade-plus of Home Depot and Amazon reviews shows these commonly run 5+ years, a track record newer tankless models can't claim
- ✓Emergency side buttons let you run washes even if the remote battery dies — a detail owners appreciate after living with remote-only rivals
- ✓Deodorizer uses a replaceable active-carbon cartridge instead of a sealed unit that fades permanently
- ✓Available in true round and elongated versions, unlike the elongated-only Discovery DLS
- ✗Tank heater gives roughly 30 seconds of warm water before it turns cool — the single most repeated complaint; long-wash users should pay up for the BB-2000's hybrid heater
- ✗IR remote fires its signal from the top edge, so when wall-mounted above the seat the bidet sometimes misses commands — one reviewer called the design 'hilariously bad'
- ✗Multiple owners report remotes dying after 2-3 years while the seat itself keeps working, and replacements cost ~$50
- ✗No night light — a standard feature on the BB-2000 and most modern rivals at this price
- ✗Chunky early-2010s styling with a tall tank hump; it looks its age next to an Alpha JX or Discovery DLS
- ✗Water at max temperature only reaches lukewarm for some users because the tank reheats slowly between back-to-back uses
- ✗The dryer is as weak as the BB-2000's — expect a damp finish and a reach for paper
- ✗No user presets or eco scheduling; energy-save mode is a single crude button