Return and Refund Policy Shipping Policy Terms of Service Warranty
About Us Contact Us
Skip to content

Toto KS5 vs KS6

The TOTO KS5 and KS6 are the "smart shoppers' choice" in the Washlet world. Both models offer TOTO’s elite tankless water heating and ultra-slim design without the showroom markup.

While they share the same powerful cleaning engine, the KS6 is the superior choice for busy households, offering expanded memory for four users compared to the KS5's two-profile system.

Choosing between them is a matter of household size. Go with the KS6 if you want every family member to have their own saved settings, or stick with the KS5 if you want the same high-end, endless warm water performance at the absolute lowest price point. Check out our Toto Washlet Comparison Chart to compare all Toto Washlets.

Comparison of Toto Washlet KS5 and Toto Washlet KS6 with text labels on a blue background.


Quick Verdict

Not sure where to start? Here’s the short version. Both bidets are top-tier performers, but they exist to give you options based on current stock and retailer availability.

Toto KS5

A solid choice with reliable performance and proven features.

Choose this if you want…

  • A dependable bidet with strong everyday performance
  • Core cleansing and comfort features at a good value
  • A bit more budget-friendly option
$450.00
View Product

Toto KS6

A newer, more modern bidet seat with refined design and comfort.

Choose this if you want…

  • A slimmer and sleeker bidet profile
  • Updated styling and refined aesthetics
  • A slightly more modern overall experience
$649.00
View Product

TOTO KS5 vs KS6 Comparison Chart

The table below summarizes the key specs and features of the TOTO KS5 and TOTO KS6 Washlets. Use this as a quick reference before diving into the detailed breakdown below.
TOTO KS5 vs KS6 Comparison Chart
Feature Toto KS5 Toto KS6
Auto Open/Close Lid Manual Manual
EWATER+ Sterilization Yes Yes
Instant Water Heating Tankless Tankless
4-User Memory Settings Yes Yes
Heated Seat Adjustable Adjustable
Warm Air Dryer 5 Settings 5 Settings
Night Light Auto-Sensing Auto-Sensing
PREMIST Bowl Cleaning Yes Yes

TOTO KS5 vs KS6: Detailed Review

1
TOTO WASHLET KS5 Elongated Bidet Seat - White electronic toilet seat with control panel on a white background

TOTO WASHLET KS5 Elongated Bidet Seat

TOTO

Pros
  • Best-in-Class Value
  • Continuous Warm Water
  • Ultra-Slim Build
  • Includes PREMIST
  • Reliable Hardware
Cons
  • Lid is manual
  • Minimal Customization
$450.00
View Product
2
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
$649.00
View Product

TOTO KS5 vs KS6: What Makes These Models Special?

The Tankless Standard

TOTO's newest generation of Washlets has completely eliminated the bulky rear water tank.

Both the KS5 and KS6 utilize an instantaneous heating coil, which warms water as it travels to the nozzle. This ensures you never run out of warm water, even during long wash cycles, while also keeping the seat nearly 2 inches shorter than traditional bidets.

TOTO WASHLET KS6 heated seat

Advanced Technology Features

Both models are equipped with TOTO’s "Clean Research" suite. This includes PREMIST, which mists the bowl before you sit down to reduce waste adhesion, and EWATER+, which transforms ordinary water into a sanitizing agent to blast the wand clean after every use

TOTO WASHLET KS5 Elongated Bidet Seat - Toilet seat with heated seat, warm-air dryer, and cleansing spray features on a blue background

Choose TOTO KS5 If You:

  • Identical flagship performance (Tankless, 4-user memory, EWATER+)
  • An alternative inventory option if the KS6 is out of stock
  • TOTO quality and reliability at a competitive online price

Choose TOTO KS6 If You:

  • The absolute latest model number in TOTO's online-exclusive lineup
  • Endless warm water provided by a high-efficiency tankless heater
  • A sleek, 5.5-inch profile that fits seamlessly on elongated toilets

Frequently Asked Questions

  • The difference is that the KS6 has a slimmer, more modern profile, while the KS5 has a slightly taller and more traditional shape.

  • Yes. Both models are tankless and heat water on-demand so it never runs cold.

  • Both the KS5 and KS6 include remotes with memory for 4 unique users.

  • Yes, both models include an auto-sensing nightlight that illuminates the toilet bowl.

  • Both are designed specifically for Elongated toilet bowls in Cotton White.

  • Yes. Both are designed for simple DIY installation and include all necessary hardware.

  • Neither the KS5 nor the KS6 supports an auto‑flush kit; this is available on higher‑end models.

  • Both use auto‑sensing for seat detection and night light activation.

  • No. Both feature a 5-level adjustable warm air dryer.

  • They require a standard 120V GFCI outlet located within 3–4 feet of the toilet.

Helpful Resources

Find everything you need to know

Related Collections

Compare Products

Best Sellers