KOHLER San Souci Touchless Comfort Height 1-piece 1.28 GPF Elongated Toilet with AquaPiston Flushing Technology in White-K-4000-0 - The Home Depot
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Model # K-4000-0

Internet # 205225961

San Souci Touchless Comfort Height 1-piece 1.28 GPF Elongated Toilet with AquaPiston Flushing Technology in White

KOHLER San Souci Touchless Comfort Height 1-piece 1.28 GPF Elongated Toilet with AquaPiston Flushing Technology in White

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$614.40 / each


Model # K-4000-0

Internet # 205225961

The San Souci one-piece toilet offers a sleek, contemporary design combined with KOHLER touchless flush. Just hold your hand over the tank sensor to activate the flush. No handle to touch means fewer germs to pick up or leave behind. This toilet features innovative AquaPiston technology, a patented flush engine that delivers a fast, powerful, and plug-free flush. A 1.28-gal. flush provides significant water savings of up to 16,500 gal. per year, compared to a 3.5-gal. toilet, without sacrificing performance.

  • Flush is activated by a no-touch sensor mounted inside the tank
  • Powered by 4 AA batteries (included)
  • One-piece toilets integrate the tank and bowl into a seamless, easy-to-clean design
  • Compact elongated bowl offers added comfort while occupying the same space as a round-front bowl
  • Low-profile design
  • Comfort Height feature offers chair-height seating that makes sitting down and standing up easier for most adults
  • 1.28 GPF (gallons per flush)
  • Concealed trap-way and low-profile bolt caps facilitate easier cleaning and enhanced design
  • Includes K-4008 grip-Tight Reveal Q3 seat
  • Supply line not included
  • Touchless module projects an electromagnetic field through the top of the tank lid that senses your hand, causing the toilet to flush
  • Single-flush gravity uses the force of gravity and a precision-engineered tank, bowl, and trap-way to create a strong siphon during flushing
  • AquaPiston canister allows water to flow into the bowl from all sides (360 degrees), increasing the power and effectiveness of the flush
  • Flush valve's 3:2 ratio harnesses the natural force of gravity and optimizes flush performance
  • Durable canister design has 90% less exposed seal material than a 3 in. flapper, for leak-free performance
  • Light-touch canister flush requires a lower actuation force than a flapper
  • Touchless only adds three simple steps to installation
  • DryLock system saves installation time and helps prevent water leakage

    Kohler San Souci Touchless Toilet

    Kohler AquaPiston Flushing Technology

Info & Guides

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Bowl Height (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Bowl Height 
Comfort Height 
Bowl Shape 
Color Family 
Commercial / Residential 
Flushing Mechanism 
Gravity Flush 
Flushing Technology 
Flushing Type 
Single Flush 
Gallons Per Flush 
MaP Performance Rating 
Vitreous China 
Mount Location 
Floor Mount 
Product Weight (lb.) 
94 lb 
Rough In Size 
Toilet Features 
No Additional Features 
Toilet Included Components 
Warranty / Certifications
Certifications and Listings 
No Certifications or Listings 
Manufacturer Warranty 
One Year Limited Warranty 


Rated 4.8 out of 5 by 10 reviewers.
Rated 5.0 out of 5.0 by WoW this is great a powerful auto flush modern design water saver toilet WoW this is great a powerful auto flush modern design water saver toilet this is a Kohler product. High quality and very easy to install the one piece design is classy an modern perfect height for us older folks. The slow close lid that is included is a welcome item as no more loud slamming of the lid late at night. Looks great in our newly remodel bathroom. SAN SOUCI TOUCHLESS COMFORT HEIGHT 1-PIECE 1.28 GPF ELONGATED TOILET WITH AQUAPISTON FLUSHING TECHNOLOGY IN WHITE September 6, 2014
Rated 5.0 out of 5.0 by Super easy to install The toilet comes with a nice slow-close toilet seat and the AquaPiston is pre-installed, so you only have to set up the sensor which is very easy to do. What I like best about this toilet is the modern look, the powerful AquaPiston flush, and the easy installation. This is the first time I install a toilet that comes with tall guides you can actually see while lifting the toilet so you know when it’s in the right location. Once you set down the toilet, you put your fingers on the plastic guide, then you take out the guide and it tells you which size bolt to use to tighten the toilet (comes with 3 bolt sizes). The bolts end up being flushed, so they don’t stick out like traditional toilet bolts making it so easy to clean. This also gives it a very modern look. The only thing I don’t like about this toilet is that if you ever change your mind about having a touchless plush, there is no hole to ever install a flush handle. I don’t see why anyone would ever want to switch back to the handle, but you never know. Maybe you have kids that keep playing with it or a cat that sits on your toilet and flushes it constantly for fun…never know. I would recommend this toilet to anyone because it’s worth the price. October 11, 2014
Rated 4.0 out of 5.0 by Very Stylish, Good flush and Easy to Clean The Kohler San Souci Touchless Comfort Height 1 Piece 1.28 GPF Elongated Toilet with Aquapiston Flushing Technology in white, has powerful flush for a 1.28 gallon toilet, one of the better design features is that most of the area in the toilet bowl is covered with water so solid waste can be removed with ease. The San Souci Touchless flush feature provides a perfect flush every time. We had the toilet delivered, the trucking company gave a delivery window of 8 hours....when it was delivered the truck driver leaves it in the driveway on a pallet, the toilet is 94 pounds so have someone around to help. As for installation KEEP in mind this toilet is 94 Pounds! and it is very difficult to line it up on the flange, the install kit gives you 2 thin plastic depth gauges that get easily moved and broken while trying to get the toilet set on the flange, we used small dowels to help line up the screw holes. With that said we are very happy with the design and function. February 11, 2015
Rated 5.0 out of 5.0 by Sleek Design and Very Comfortable Touchless Toilet I recently upgraded the toilet in my half-bath to a new Kohler San Souci Touchless Comfort Height One-Piece Elongated Toilet. This is the first one-piece toilet I have ever owned, and I must say I’m quite impressed with the sleek design and contours. The San Souci is 5 inches shorter than most two-piece toilets, however it’s very heavy for the small size. The integral tank on the San Souci one-piece toilet is much smaller than a conventional two-piece toilet, but has sufficient capacity for the 1.28 gpm flush using the efficient AquaPiston Canister flush system. It includes a motion-activated actuator that provides a touchless flush when moving your hand near the right top of the tank. The actuator is powered by 4-AA batteries, which are supplied with the toilet. The San Souci toilet has a comfortable 16.5 inche height and a shallow depth of only 27.75 inches, making it ideal for small spaces. The one-piece design prevents leaks common in two-piece toilets from the holes attaching the tank to the bowl. Cleaning behind the seat is also much easier with a one-piece toilet. The only negative aspect of the San Souci Toilet is the high cost, which is common with all one-piece toilets. However, the quality and functionality of the San Souci toilet are outstanding. The touchless feature is icing on the cake. Highly recommenced if cost is not prohibitive. October 6, 2014
Rated 5.0 out of 5.0 by Just beautiful! This touchless toilet is awesome! Setup is the same as any other toilet except there is an automatic toilet flusher that you have to slide in the bowl. It's easy to setup and works great. No issue with waving hand for the flusher to work. Takes 4 AA batteries and the toilet comes with batteries. It's a one piece so it's easy to install. It looks great in any bathroom. The height is comfortable but still a bit high for us short people. Love it. October 22, 2014
Rated 5.0 out of 5.0 by Streamlined, Modern Powerful Toilet This is an awesome toilet that has totally changed the look and feel of my bathroom. Shipping/Installation: Arrived in a MASSIVE box and was extremely well packed. Not a piece was chipped, cracked or otherwise out of place. Installation was also very straightforward (nothing fancy or new required to install). Appearance: Very streamlined, one piece toilet. I have a small bathroom with the toilet right next to the bath so every inch really matters. Even though this was an elongated comfort height toilet, it took up less floor space than the small, round toilet I had previously. The shorter tank also takes up less "visual space" making the whole bathroom feel larger. Operation: Even though this is low flow it is HEAD OVER HEELS more powerful than my last low-flow toilet. No need to double flush. To flush: you must hold your hand over the button (on the back of the tank) for about a second, then you hear a quiet beep before the flush. No problems accidentally setting it off when reaching for a tissue, etc. All in all this is an awesome, streamlined toilet that's easy to clean and modern. It has good flushing power while still being low-flow. Couldn't recommend this more highly. October 6, 2014
Rated 5.0 out of 5.0 by This is not a 'bog standard' toilet I've installed toilets before, and the first thing that struck me about this Kohler toilet was its weight. This is a very substantial, and well made, toilet. Installation was a breeze, requiring two bolts be undone, the hose disconnected, the old toilet lifting out, and the new one setting in place. Once installed I was immediately struck by how modern and stylish it looked compared to the one it replaced. It gave the whole bathroom an updated look. The elongated design, and slightly higher seat position, make for a very comfortable experience. The toilet is a one piece, it is molded without any nooks or crannies to attract dirt and grime. A simple wipe down is all that is needed to keep it in pristine condition. The conventional flush handle of 'old fashioned' toilets is replaced with a touch-less sensor, and a simple wave of the hand flushes the toilet. The sensor takes 4 AA batteries (which Kohler supplied in the box). When the batteries are low, the unit will beep five times at half-second intervals when activated to indicate it's time to replace them. Compared to my old toilet with 1.6 gpf (this one being just 1.28 gpf), I was surprised at how strong the flush was. The bowl was flushed clean using almost 3/4 of the water the old one needed. I've never needed to flush this toilet twice, were the old one would occasionally require an extra flush. Kohler's manual states the AquaPiston canister allows water to flow into the bowl from all sides (360 degrees), increasing the power and effectiveness of the flush. This was certainly the case in my experience. The force of the flush was very impressive. The supplied toilet lid has a slam free closing design which slowly lowers the seat when pushed. I'm very pleased with this toilet, and we plan to buy two more to use in two upcoming bathroom remodels later this year. September 6, 2014
Rated 5.0 out of 5.0 by Best toilet I have used so far This toilet is easy to install and has great finish. Installed it in my master bathroom. The design and look is modern. Really liked the touchless comfort feature. Flushing technology cleans the toilet nice. September 19, 2014
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