TOTO K300 Washlet SW3036#01 SW3036#12

TOTOSKU: SW3036#01
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Color: Cotton White
Size: Elongated
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The TOTO K300 Washlet (SW3036) is TOTO's newest foray into the premium bidet toilet seat category. With a slim design, the K300 SW3036 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.  While TOTO typically has only released lower end value seats and ultra high end luxury seats, the K300 SW3036 washlet is its first bidet product attempting to reach this mid range premium category.

California residents see Prop 65 WARNINGS


SW3036#01 Washlet K300 Cotton White

SW3036#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 SW3036 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.

The absence of TOTO's eWater+ system is a bigger deal for users that are specifically drawn to that unique feature in the high end models.  eWater+ uses electrolyzed water for maximum hygiene in misting the bowl and cleaning the nozzles.  The K300 washlet still offers a self cleaning nozzle and a premisting system before each use, it just doesn't have the automatic bowl cleaning features and sanitizing functions of the S500e and S550e.  

Other minor differences between the K300 and TOTO's higher end washlets include a different remote control design with less fine tuning of features, a dryer with fewer adjustment levels, and just a single lid design. 


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.

Wide Front Spray (Soft) 
A spray with a larger radius to cover more space.

Front Cleanse (Hard)
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
Wide 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

Spec Sheet (K300 / SW3036)


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

Customer Reviews

Based on 17 reviews
Excellent product

We started out with a high end Brondell (based on price and features) but were disappointed when it failed just outside warranty. Bought a replacement, high end Toto which was excellent from the first use. Brondell offered a deal on a replacement when we complained about their product. It too has since failed and we have replaced with this k300. Excellent product (like our expensive one which is still working great). Very happy with the Toto products. What’s wrong with Brondell’s design or quality control.

As Advertised
great product worked out of the box

Easy to install. Easy to use - especially with the remote control. The only negative is that the pre clean / prep stage is a bit noisy at night - a lot of pomp and circumstance going on to just pee in the middle of the night.

LA Bidet
I recommend this toilet seat. Lots of features, well designed, low profile, and easy to turn on a...

We own two toto Vespin II toilets and have been quite happy with them. Liking the brand, I did not consider other brands of bidet toilets seats beside Toto. The K300 seemed like a good compromise between the high and low ends, and I was drawn toward the lower profile of the K300 and the presence of a fully featured remote. The seat was easy to install and has a high quality feel to it. The power cable and hose very neatly direct to the back of the toilet and I was able to tuck it all out of sight. The plastics used in the construction are however on the softer side and prone to scratching if cleaned with rough things like scouring sponges. The softer plastic make the lid of the toilet feel a bit flimsy, but it easily supports my 185 lb weight. The seat fits very well on the toto toilets. I found the toilet seat feeling a bit wobbly though and fixed this by placing a few strips of anti skid plastic tape near where the seat hinges. It has a nice quick release mechanism making it easy to disconnect the seat from the toilet for a monthly thorough bathroom cleaning. The seat has all manner of features like heated seat, odor filtering airflow, spraying of water against the toilet bowl walls as you sit down, I don't want most of these features and thankfully you can choose to turn any or all permanently on or off. The remote is nicely constructed and easy to clean. It allows all manner of fine tuning and storing of settings like water spray intensity, position, temperature, etc. etc. It's the first bidet seat I have ever tried and I am happy with it. The only improvement I can think of is with the switch which detects your weight when you sit down. It cause water to start dribbling, flushing and priming things for action. Every time you shift your weight on the seat, the switch can trip again, starting the dribbling all over gain. This could be fixed by putting a second switch near the other hinge. If Toto is listening, perhaps on a future model this can be implemented. Lastly, I am the only one in the house who wants to use a bidet toilet seat. To save the rest of the family from dribbling water sounds when they sit down, I press the off button on the remove for five second ever time I'm done to fully turn the toilet seat off, and do the same when I need it the next time to activate it. Since the toilet seat can instantly warm its water, it requires no time at all to prepare for action.

Great purchase!

My wife and I have been loving the K300! While we don't have many reference points (this is our first bidet), it's everything we wanted it to be. No complaints about the product itself, and the service and experience with BidetKing was fantastic.

Very happy customer

We were guests at one our friends house, and they had a Toto washlet in the guest bathroom. It was our first experience with the product, and we decided we should have one. So, we ordered it. It came as expected. And it was very easy to install. We could not be more satisfied with every aspect of our purchase. Thanks for everything.

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