TOTO S7A vs K300: Which Washlet is Better?
TOTO announced earlier in 2023 that the S550e Washlet, often referred to as “best bidet seat money can buy,” was being discontinued.
In its place is the brand new TOTO S7A, an upgraded version of the popular TOTO S550e.
Runner up for best bidet seat on the planet just might be the TOTO K300. The K300 Washlet is a feature-packed bidet seat at almost half the price of the current reigning champion.
So what are the main differences between these two top bidet toilet seats?
We’ll answer that question and so much more with our guide to the TOTO S7A vs K300.
TOTO K300 vs S7A - Main Differences
When comparing the S7A Washlet and the K300 Washlet, there are four main categories to look at:
- Features
- Design
- Warranty
- Price
We’ll dive into each one to give you a better understanding of what’s different between these two top-notch bidet toilet seats.
Features
| Features | TOTO K300 | TOTO S7A |
|---|---|---|
| Auto Open/Close Lid | ✓ | |
| Instant Warm Water | ✓ | ✓ |
| Unlimited Warm Water | ✓ | ✓ |
| Auto-flush capability | ✓ | |
| Heated Seat | ✓ | ✓ |
| Deodorizer | ✓ | ✓ |
| Two Year Warranty | ✓ | |
| Aerated Wash | ✓ | ✓ |
| EWATER On Wand | ✓ | ✓ |
| PREMIST Under seat | ✓ | |
| Air Dryer w/5 Temp Settings | ✓ | |
| 4 User Presets | ✓ | |
| Seamless Seat | ✓ | |
| 6 Wash Modes | ✓ | |
| Night Light | ✓ | |
| Available in round size | ✓ |
What can really differentiate TOTO Washlets are the included features. The TOTO S7A is replacing the most feature-rich bidet seat on the market, so it should come as no surprise that the TOTO K300 has less features.
Here are some of the main features that the S7A Washlet has that the K300 doesn’t:
- Automatic open/close lid
- Auto-Flush Capability
- Nightlight
- 4 user presets
- Premist under seat
- 6 wash modes
- 5 dryer temp settings
Let’s go into each of these in a bit more detail. We’ll start with possibly the most astounding and differentiating feature of the TOTO S7A Washlet: an automatic open/close lid.
Auto Open/Close Lid
Previously, the only TOTO Washlet to have the automatic open/close lid feature was the TOTO S550e.
Now that the TOTO S7A has replaced the S550e bidet seat, it should come as no surprise that the upgraded S7A Washlet has this amazing feature as well.
The automatic open/close lid works via a motion sensor that automatically opens the lid as you approach. After you’re done using the toilet and walk away, the lid then automatically closes after you.
Pretty cool huh?
Wanna learn more about the differences between the TOTO S7A and the S550e? Read our article here.
Auto-Flush
With the use of an auto-flush kit, the TOTO S7A has the capability automatically flush the toilet after use. You can program the auto-flush feature to only work after the lid is closed, as well as flush the toilet with the remote control.
This is something you won't have on the TOTO K300.
Night Light
Those not familiar with electric bidet seats don’t understand the amazing convenience of having a night-light built into the product.
The last thing we want to do in the middle of the night is turn on a bathroom light to find and use the toilet. It’s a bit surprising to us that the TOTO K300 doesn’t have this simple yet all too important feature.
4 User Presets
The new S7A Washlet has four user presets vs the two that are available on the TOTO K300. This is another upgrade over the TOTO S550e as well.
Now up to four individualized settings can be stored in the updated remote control for use. Whether you’ll actually need four user settings is another thing to consider.
Extra PREMIST
Both units have a PREMIST feature where the bowl is misted before use.
With the S7A Washlet, this begins as the user approaches the toilet. With the K300 Washlet the PREMIST starts when the user sits down and activates the seat sensor.
The S7A Washlet has extra PREMIST applied to the under-side of the seat and the K300 Washlet does not.
Wash Modes
The TOTO K300 has four distinct modes to the TOTO S7A’s six. We’ll break those down below.
TOTO K300:
- Front wash
- Rear wash
- Rear soft
- Oscillating mode
TOTO S7A
- Front wash
- Wide Front
- Rear wash
- Rear soft
- Oscillating mode
- Pulsating mode
You’ll have a wider variety of water pressures to play with on the Washlet S7A vs TOTO K300. They both however have instant, unlimited water heating.
For more information about the different types of warm water bidet heaters, you can read our article about that here.
Dryer Temp Settings
Both the TOTO S7A and the Washlet K300 have a warm air dryer feature. This will allow you to greatly reduce or entirely eliminate the need for toilet paper.
The S7A Washlet has the option of five different temperature settings while the K300 Washlet only has three. Having a little more variation in this department is nice as this is a sensitive area. Otherwise your choices are cold, medium and hot.
Design
There are some design advantages when comparing the TOTO S7A vs K300.
Some of the upgraded design improvements include:
- Seamless seat
- Slimmer seat
- Shorter lid-up height
- Available in round size
We’ll explore some of them in a bit more detail here.
Seamless Seat
One of the main upgrades from the TOTO S550e to the TOTO S7A is a seamless seat. The TOTO K300 has a gap underneath the seat that can collect dirt and grime.
The S7A Washlet design eliminates this gap which makes it easier to clean and allows for a more hygienic user experience. The TOTO C5 Washlet is another bidet seat with this upgraded seamless seat.
For the differences between the TOTO S7A and C5 Washlet, we have an article here just for you.
Seat Height
The TOTO S7A is one of the sleekest bidet seats on the market with a seat height of only 4.06”.
The TOTO K300 has an overall seat height of 5.19”
There’s an obvious winner here in this regard. We love a sleek seat!
Lid-Up Height
For those remodeling their bathroom and looking at the dimensions they have to work with, every inch can count.
The height from the very bottom of the seat to when the lid is raised up measures:
- TOTO S7A : 22.125”
- TOTO K300 : 23.94”
As you can see in the dimensions for the K300 below, there is almost a 2” difference between the TOTO S7A vs K300 raised lid height.
*We'd include an image of the TOTO S7A dimensions, but there's a slight error on the spec sheet from TOTO. Part of the drawing is cut off so you can't read the numbers correctly. We'll update this article once TOTO updates the S7A spec sheet.*
For those looking to put a bidet seat on a wall-hung toilet with an existing actuator plate, you wouldn’t want the lid to totally obscure the flush buttons. In those types of situations an inch or two here and there can make a big difference.
For those interested in looking at all the dimensions and additional product info, we have the TOTO S7A vs K300 specs below:
- TOTO Washlet S7A Spec Sheet
- TOTO Washlet K300 Spec Sheet
Round Size Availability
TOTO made the Washlet S7A available in both round and elongated sizes shortly after its release. The K300 Washlet is only available in elongated size.
Be sure to measure your toilet bowl to see which size Washlet you need before ordering.
Comparing the TOTO S7A to the TOTO S7 is pretty much the same as comparing the differences between TOTO S500e and S550e.
If you were interested in comparing the product info for the previous version of the S7A, we’ve got the TOTO S550e specs right here.
For the TOTO S550e best price you can click here.
For more info about the differences between the TOTO S7 and S7A, you can read our article about that here.
And while we're talking about design and dimensions, here’s a link about how to install TOTO K300.
The S7A installation manual can be found here.
TOTO Washlet Warranty
TOTO has recently extended the warranty on their S7 and S7A Washlets from one year to two years. This update also applies to those who have already purchased either model.
In comparison, the TOTO K300 Washlet (like all other Washlets) comes with a standard one-year limited warranty.
However, if you'd like additional warranty protection for the TOTO K300, you can choose to add extended coverage at checkout. Simply look below the add-to-cart button on the product page for more information on pricing.
TOTO S7A vs K300 Price
So now we get to price. Do you want to guess which one costs more?
If you guessed the TOTO Washlet with all the extra features and a much slimmer design, than you are correct! 15 Washlet points for you.
For the most current price for the TOTO S7A click here.
For the TOTO K300 price click here.
TOTO K300 vs S7A Similarities
It’s not all differences in this comparison! We wanted to provide you with the whole picture in order for you to make the most informed decision.
Here are all the most important features that both the TOTO S7A and K300 Washlet share:
- Adjustable water temperature and pressure
- Aerated water for a gentler yet more effective cleanse
- Unlimited warm water
- Instant warm water
- Automatic deodorizer
- Heated seat
- Warm air dryer with temp control
- Remote control
- EWATER - Electrolyzed water for self cleaning
- PREMIST
TOTO S7A vs TOTO K300 Review
We hope you’ve found our Washlet comparison guide helpful. For more information you can always contact us here or give us a call!
707-297-3991
Leave us a comment about your experience with either of these Washlets and let us know which one you think is better.
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