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Toto KS6 vs S5

The TOTO KS6 and S5 are both advanced bidet seats designed for comfort and hygiene, but they differ in design, feature depth, and overall positioning. The KS6 offers a modern, streamlined experience with upgraded aesthetics, while the S5 focuses on proven performance with reliable everyday features.

Both models include warm water cleansing, heated seating, and automatic cleaning technologies, but the KS6 leans more toward a refined, modern upgrade while the S5 remains a strong mid-range staple. Check out our Toto Washlet Comparison Chart to compare all Toto Washlets.

Comparison between Toto Washlet KS6 and Toto Washlet S5 with text labels on a light blue background.


Quick Verdict

Not sure where to start? Here's the short version. Both bidets are excellent, but they suit different preferences.

Toto KS6

An online-exclusive powerhouse that delivers TOTO's best cleaning technology in a traditional design.

Choose this if you want…

  • The best value for a tankless, instant-heat Washlet
  • A traditional curved lid that looks like a standard toilet seat
  • Elite features (EWATER+, 4-user memory) without the showroom markup
$550.00
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Toto S5

A designer-tier bidet seat with a sleek, modern aesthetic and versatile sizing options.

Choose this if you want…

  • A seamless, modern look with a telescoping lid that hides the seat
  • Compatibility for a Round toilet or a Sedona Beige color match
  • The most refined aesthetic for a contemporary master bathroom
$682.00
View Product

Toto KS6 vs S5 Comparison Chart

The table below summarizes the key specs and features of the TOTO KS6 and TOTO S5 Washlets. Use this as a quick reference before diving into the detailed breakdown below.
Toto KS6 vs S5 Comparison Chart
Feature TOTO Washlet KS6 TOTO Washlet S5
Lid Design Traditional Curved Slim Telescoping
EWATER+ Sterilization Yes Yes
Instant Water Heating Tankless Tankless
4-User Memory Settings Yes Yes
Seat Shapes Elongated Only Elongated & Round
Colors Cotton White White & Sedona Beige
Night Light Auto-Sensing Auto-Sensing
PREMIST Bowl Cleaning Yes Yes
Auto Open/Close Lid Manual Manual
Heated Seat Adjustable Adjustable

Toto KS6 vs S5 Washlets: Detailed Review

1
TOTO WASHLET KS6 Elongated Bidet Toilet Seat - White electronic toilet seat with control panel on a white background

TOTO WASHLET KS6 Elongated Bidet Toilet Seat

TOTO

Pros
  • Unbeatable Value
  • Instant Warm Water
  • 4-User Memory
  • Hygiene focused
  • Ultra-Slim Design
Cons
  • Only available for Elongated toilets
  • Only available in Cotton White
$550.00
View Product
2
TOTO WASHLET S5 Bidet Round Seat - main image of bidet seat on a white background

TOTO WASHLET S5 Bidet Seat

TOTO

Pros
  • Warm water wash
  • Heated seat & warm air dryer
  • Self-cleaning nozzle
  • Deodorizer
  • Adjustable spray & pressure
Cons
  • Higher price than basic seats
  • Needs power outlet
  • No advanced smart app control (remote only)
$682.00
View Product

TOTO KS6 vs S5: What Makes These Models Special?

Modern Upgrade vs Proven Performance

The TOTO KS6 is designed as a newer-generation Washlet with a slimmer profile and updated styling. It focuses on delivering a more refined look while maintaining core bidet functions like EWATER+ cleaning, PREMIST, and tankless water heating.

The TOTO S5, on the other hand, is a well-established mid-range model known for reliability and strong performance. While it has a slightly bulkier profile, it delivers consistent comfort and functionality that has made it a popular choice for many households.

TOTO WASHLET S5 heated seat

Advanced Technology Features

Both models use instant tankless water heating, ensuring unlimited warm water for consistent comfort.

EWATER+ technology helps clean the wand automatically after each use on both models, promoting better hygiene and reducing maintenance.

PREMIST technology is included in both seats, preparing the toilet bowl before use to prevent waste from sticking and making cleaning easier.

Both models also include 4 programmable user memory settings, allowing multiple users to save their preferred water temperature, pressure, and spray position.

TOTO WASHLET S5 Instant Warm Water

Choose TOTO KS6 If You:

  • You want the best deal - Typically priced lower as an online-exclusive model.
  • You like traditional design - The curved lid feels more familiar and looks like a standard seat.
  • You have an Elongated bowl -This model is purpose-built for standard elongated toilets.

Choose TOTO S5 If You:

  • You want a "hidden" look - The telescoping lid creates a clean, uniform silhouette when closed .
  • You have a Round toilet - The S5 is available in both Elongated and Round shapes.
  • You need Sedona Beige - Only the S5 offers color options beyond standard white.

Frequently Asked Questions

  • The difference is purely aesthetic and logistical. The S5 features a modern "telescoping" lid that hides the seat and comes in multiple colors/sizes. The KS6 is an online-exclusive model with a traditional curved lid, available only for elongated white toilets.

  • Yes, the TOTO KS6 includes an auto-sensing LED night light that illuminates the bowl.

  • Neither model features an automatic lid; both require manual opening and closing (though both have a "SoftClose" hinge to prevent slamming).

  • Both the KS6 and S5 have a rear height of 5.5 inches. They are approximately 19% slimmer than older tank-style models and fit most standard elongated toilets.

  • There is no difference. Both models use EWATER+ technology specifically to sanitize the bidet wand before and after every use.

  • No. Neither the KS6 nor the S5 is compatible with TOTO’s Auto-Flush kits. That feature is reserved for the S7 and S7A models.

  • Yes. Both utilize instantaneous (tankless) water heating to provide a continuous stream of warm water that never runs out.

  • No. Both models come with the same slim, wireless remote that allows for 4-user memory presets.

  • Both seats use a touch-sensitive seat sensor (to detect a user) and a light sensor (to trigger the night light).

  • Yes, both models are equipped with an auto-sensing night light.

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