TOTO WASHLET K300 w/ EWATER+ SW3036R#01, SW3036R#12

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Color: Cotton White
Size: Elongated
In stock
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The TOTO K300 Washlet (SW3036R) is TOTO's updated premium bidet toilet seat. With a slim design, the K300 SW3036R washlet is available in Elongated size only and includes the typical premium bidet seat features like tankless water heating, warm air dryer, deodorizer, heated seat and a self cleaning nozzle.  Compared with the previous SW3036 model, this updated K300 SW3036R has the addition of TOTO's eWater+ feature.

California residents see Prop 65 WARNINGS


SW3036R#01 Washlet K300 Cotton White

SW3036R#12 Washlet K300 Sedona Beige


With the K300 washlet, TOTO is trying its hand in the mid-range, online bidet seat market.  Compared to the lower end C200 and C100 models, the K300 has a much slimmer and lower profile design.  The C series washlets are very bulky, around 8"-9" tall in the rear.  While they function ok, the bulkiness of that model range is a big turn off to many users.  The TOTO K300 SW3036R bidet is just 5.25" tall in the very rear, so it's design is much more modern and in line with other premium bidet seats on the market.  The other big improvement the K300 has is the tankless water heating system.  This makes it much more energy efficient and provides unlimited warm water for maximum comfort. The round size was also eliminated in the K300 washlet series.

So what separates the K300 SW3036 from TOTO's highest end models like the S500e and S550e?  The two major differences are the absense of TOTO's unique eWater+ system, as well as the slightly bulkier design.  TOTOs highest end models are about 4.5" tall in the rear, so they are the lowest profile bidet seats on the market.  While the K300's 5.25" design isn't that much taller, it's closer in line with other brands on the market like Bio Bidet, Brondell and Alpha. The K300 washlet also does not have an automatic lid/seat or an LED nightlight.

Self-Cleaning Wand with EWATER+

After each flush, EWATER+ mists on the wand and toilet bowl, reducing the need for harsh cleaning chemicals.


Features and Functions

Gentle Aerated, Warm Water, Dual Action Cleansing Spray
The main function of the WASHLET w/ soft and hard sprays.

Instant Water Heating System
For continuous warm water and energy saving.

Convenient Slim Wireless Remote Control
Wall mountable with illuminated buttons.

Oscillating or Pulsating Functions
For maximum comfort, take advantage of the oscillating or pulsating spray patterns.

Hands Free Dryer
Warm air drying with adjustable temperature (3 levels).

Rear Spray (Soft)
A soft, comfortable spray.

Rear Cleanse (Hard)
Warm water spray with adjustable water temperature and pressure.

Front Cleanse 
Warm water spray with adjustable water temperature and pressure.

Heated Seat
Comforting, warm seat.

Self-cleaning Wand
Wand is cleaned before and after every use.

Automatic Air Deodorizer
Air is filtered to help remove odor.

Water spray that wets the bowl before use.

User Presets
Save settings for 2 users.


Power Rating  AC 120 V 60 Hz
Power Consumption  1274 W
Max Power Consumption  1430 W
Power Cord Length  3.94 ft (1.2 m)
Spray Volume Rear Cleansing:
0.07 – 0.11 gal/min
Rear Soft Cleansing:
0.07 – 0.11 gal/min
Front Cleansing:
0.08 – 0.11 gal/min
Spray Features Adjustable Surface Temp:
86 – 104 ºF (30 – 40 ºC)
Safety Device:
Temperature Fuse
Warm Air Dryer Features Adjustable Air Temp:
95 – 140 ºF (35 – 60 ºC)
Airflow Volume:
10.24 ft3/min (0.29 m3/min)
Safety Device:
Temperature Fuse
Heated Seat Features Adjustable Surface Temp:
82 – 97 ºF (28 – 36 ºC)
Safety Device:
Temperature Fuse
Water Supply Pressure Minimum:
7.25 PSI (Dynamic)
108.75 PSI (Static)
Ambient Temp.  32 – 104 ºF (0 – 40 ºC)
Warranty  One Year Limited Warranty
Shipping Weight  14.5 lbs
Shipping Dimensions  23-1/2"L x 18-1/2"W x 7"H

Fitment Guide 

washlet fitment


Download Product Sheets

SW3036R Spec Sheet

Users Manual

SW3036R Users Manual

The TOTO K300 Washlet from comes in a 12 Month Manufacturer's Warranty (from date of purchase).

Fitment and Installation Guides

Customer Reviews

Based on 10 reviews
David L
Great bidet, great service

This is the third Toto bidet washlet I have purchased in about the last 20 years, so I have high expectations from the K300. The notable thing was the excellent customer service I received from BidetKing. I contacted customer service several times before ordering, to find out if the K300 would be a good replacement for my 11-year-old S300. I received intelligent, informative answers to my questions, and then I asked if I could slightly delay their speedy delivery so I would be home when the K300 arrived. BidetKing executed this simple request perfectly. The K300 itself is the best Toto I've had, and I installed it easily on a new Toto Ultramax II one-piece toilet. The combination of the EWater, the pre-mist and post-cleaning, not to mention the coating inside the toilet has made for the easiest setup to keep clean you can imagine. I think the overall volume of the water during cleansing is a bit less with the K300 than my previous unit, but the accuracy of the stream from the nozzle is perfect for my wife and me. Also, the personalized settings for each of us is handy. The air dryer is powerful, much more so than my old unit. The overall fit, finish and performance so far of the K300 has been excellent. I'm so glad I bought from BidetKing instead of elsewhere - they really are a responsive team that cares about customer service. .

Lee Stetson
Best Washlet Ever

Firstly, I’ll note that I recently moved and decided to upgrade from the bidet attachment I was previously using to this washlet. I wasn’t sure the experience would be noticeably better than the simple attachment, but wow! The upgrade in experience is incredible. I’ll be installing washlets only for the rest of my life.

I selected this over some other models due to the tankless water heating system. I wasn’t actually sure I would care about warm water, but now I’m grateful for it. Endless warm water is excellent.

I find the oscillating and pulsing features relatively useless, but everything else about this washlet is top notch and adds to the experience of using it. However, it did take a few days to get used to the occasional self-cleaning the washlet does. Similar to the way it first splashes some water when you sit down, it will occasionally drop a bunch of water into the bowl at seemingly random times. This scared me and woke me up the first couple nights where it would do this at 3 or 4 AM. But after a few weeks I’m mostly used to this, and rarely wake up from it anymore.

All in all, this washlet exceeded my expectations. Toto deservers their recognition as the top brand in washlets. That said, at the price I’m debating whether to select this model or a lesser model for my second bathroom which gets much less use than the master bathroom. If I do choose this one, I know I won’t regret paying the premium.

David Rood
Great product

Easy install. Easy to use. First time bidet users have become big fans!

Tony Nichols
Very nice bidet with all the features I Need

This bidet meets all my needs. I now have 4 bidets, a BB2000 and a Toto K550e and 2 K300s and love them all. The only complaint I have about the K300 is that the rear compartment that houses the sprayer is a bit forward of the seat which causes it to get water spray droplets on the doors after use. This is a poor design and requires a quick wipe after use; a minor inconvenience. Otherwise, a really great bidet!

Martin Hoover
Good but not great

Is functional and delivers as promised. Wife comments it doesn't actually get to the female wash well. Makes a lot of noise and the little pilot lights are like a beacon in a dark room. I paid considerable more for the K300 than other product thinking this was a substantial upgrade but delivers pretty much the same experience as the much less expensive unit I have in another bathroom.

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