Toto Washlet KS6 vs Bio Bidet Horizon
Quick take: The Bio Bidet Horizon costs $1 less; the Toto Washlet KS6 heats water via tankless (instant heat) while the Bio Bidet Horizon is hybrid heater.
| Spec | Toto Washlet KS6 | Bio Bidet Horizon |
|---|---|---|
| Price | $500 | $499 |
| Rating | 4.7★ (45) | 4.3★ (350) |
| Type | Electric Bidet Seat | Electric Bidet Seat |
| Water Heating | Tankless (Instant Heat) | Hybrid Heater |
| Controls | Wireless Remote | Wireless Remote |
| Toilet Fit | Elongated only | Elongated only |
| Power | Needs GFCI outlet within 4 ft | Needs GFCI outlet within 4 ft |
| Spray Pressure | 5 pressure levels | Adjustable via remote |
| Nozzle | Self-cleaning EWATER+ wand | Stainless with UV sterilization |
| Install | 30-45 min DIY | 30-45 min DIY |
| Warm water | Yes | Yes |
| Heated seat | Yes | Yes |
| Warm air dryer | Yes | Yes |
| Wireless remote | Yes | Yes |
| Night light | Yes | Yes |
| Deodorizer | Yes | No |
| Self-cleaning nozzle | Yes | Yes |
| Feminine wash | Yes | Yes |
| Warranty | 1-year limited | 1-year full |
Pros & cons
Toto Washlet KS6
- ✓Feature-for-feature an S5 twin — same remote with four presets, EWATER+, PREMIST, night light, dryer, and deodorizer — at $500 versus the S5's ~$650, making it the best value in TOTO's 2026 lineup
- ✓Replaces the K300, which was selling above $850 as stock dried up — the KS6 launched cheaper than its predecessor ever sold
- ✓This home-center line has been tankless since the K300 debuted in 2021, so the instant-heat platform here has more field history than the rest of the new S-generation
- ✓Home Depot distribution means local stock, easy returns, and price matching — no bidet-specialist shipping wait
- ✓Four-user preset memory matches seats costing twice as much; Brondell's $480 Swash 1400 stores only two profiles
- ✓PREMIST plus EWATER+ maintain both bowl and wand automatically — HD reviewers report visibly less bowl scrubbing within the first week
- ✓Same 82-97°F heated seat and 95-140°F adjustable dryer as the S5, with the seamless one-piece seat surface that wipes clean in a single pass
- ✓Home Depot reviewers repeatedly single out the smooth install: docking bracket, metal tee, and hose fit standard US toilets in about 30 minutes
- ✗Elongated only — round-bowl owners are pushed to the S2 or S5, and TOTO's fit guide is strict: measure the ~18.5-inch bolt-to-rim length before ordering
- ✗Cotton White only, so there's no Sedona Beige to match older colored fixtures
- ✗As a channel-exclusive SKU it gets thin coverage from bidet review sites — there's far less owner troubleshooting lore online than for the S5
- ✗One-year warranty, and TOTO parts are famously dear once it lapses — a replacement remote alone runs about $100
- ✗Same gentle TOTO dryer as every other Washlet: adjustable to 140°F but low airflow, so fully air-drying takes a couple of minutes
- ✗The 1,278-watt instant heater needs its own GFCI within reach of the 3.93-ft cord
- ✗No auto open/close lid or auto-flush hooks at this price — TOTO reserves those for the S7A at roughly 2.5x the cost
- ✗Launched mid-2025, so the Home Depot review base is enthusiastic but shallow (roughly 45 reviews) compared with years of K300 history
Bio Bidet Horizon
- ✓Motorized auto open/close lid greets you like a $1,000+ smart toilet — the Discovery DLS is Bio Bidet's only other seat with it, at $100+ more
- ✓Built-in UV sterilizer bakes the nozzle clean after every use, a hygiene step even the Toto S5's EWATER+ handles with chemicals instead of light
- ✓Enhanced multi-stage warm-air dryer is a real step up from the token dryers on the BB-1200 and BB-2000 — owners say it can actually finish the job
- ✓Hybrid heating delivers unlimited warm water with no mid-wash temperature sag
- ✓Costco runs it at $339.99 several times a year — flagship features for BB-1200 money if you time it
- ✓Oscillating front wash plus adjustable stainless nozzle covers rear and feminine cleaning well beyond most upper-tier rivals
- ✓Costco's generous return policy effectively papers over the short factory warranty for club members
- ✓Low-profile design with concealed cord routing looks far more modern than the decade-old BB-2000 silhouette
- ✗No deodorizer — an odd omission at $500 when the $399 USPA 6800U and $469 BB-2000 both have one
- ✗No multi-user presets, so every rider re-adjusts temperature and pressure by hand
- ✗Elongated only; round-bowl households are out entirely
- ✗The auto-lid motor is one more thing to break, and a few Costco reviewers report lids that stopped rising after a year
- ✗1-year warranty is skimpy for a premium seat — Brondell gives three years on the Swash 1400 at a similar street price
- ✗17-lb shipping weight and taller back hump make installation more awkward than the slim BB-500
- ✗Availability is Costco-centric; when the club rotates it out, the $699 direct price is hard to justify against the Discovery DLS
- ✗Auto-lid sensitivity annoys some owners — it opens for pets and cleaning passes, cycling the motor constantly