Model # K-3597-58

Internet #203094766

KOHLER San Raphael Comfort Height 1-piece 1 GPF Single Flush Elongated Toilet in Thunder Grey


San Raphael Comfort Height 1-piece 1 GPF Single Flush Elongated Toilet in Thunder Grey

  • Comfort Height offers chair-height seating (about 2 in. taller)
  • Toilet seat included with purchase
  • Pressure Assist technology provides superior flushing performance
$113141 /each

Choose Your Options

Thunder Grey
  • Almond
  • Biscuit
  • Black Black
  • Ice Grey
  • Sandbar
  • Thunder Grey
  • White
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Frequently Bought Together

Product Overview

Powered by a Sloan FLUSHMATE pressure vessel, the Thunder Grey San Raphael one-piece high-efficiency toilet from Kohler supplies premium flushing power using significantly less water than standard commodes. Each 1.0-gallon flush represents a 37.5-percent reduction in water use compared with ultra-low-flush 1.6 GPF toilets that have been commonly installed in bathrooms since the mid-1990s. Combining form with function, the low profile of the San Raphael conveys an elegant contemporary look that will infuse any bathroom with a modern vibe.

  • Also available in biscuit, black, almond, white and sandbar
  • Preserves thousands of gallons of water in a typical household and lowers utility bills
  • Vigorous flushing action powered by FLUSHMATE air-pressure vessel
  • Constructed with durable vitreous china that resists cracking, staining and streaking
  • Includes Thunder Grey elongated toilet seat and lid with quick-release quiet-close hinges
  • Includes left-side chrome trip lever
  • Surpasses EPA's WaterSense standards for water efficiency, using just 1.0 GPF
  • Supply line not included
  • Comfort-height chair-level bowl is situated 16-1/2 in. above the floor for effortless sit-downs and stand-ups
  • 1-piece design forms a seamless tank-to-bowl unit that doesn't need to be bolted together
  • Weighs 117 lbs.
  • This product can help a building earn Water Efficiency points in the LEED Green Building Rating System. See specification sheet for water use data.
  • Features to consider when buying a toilet

Info & Guides

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Bowl Height without Seat (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Bowl Height
Chair Height
Bowl Shape
Color Family
Thunder Grey
Commercial / Residential
Pressure Assisted
Flushing Mechanism
Assisted Flush
Flushing Technology
Pressure Assisted
Flushing Type
Single Flush
Gallons Per Flush
MaP Performance Rating
Vitreous China
Mount Location
Floor Mount
Product Weight (lb.)
Rough In Size
Toilet Type
Trip Lever Location
Left Side

Warranty / Certifications

Certifications and Listings
ADA Compliant
Manufacturer Warranty
1-Year Limited Warranty

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Customer Questions & Answers

Does the Raphael model come with the option to have the handle on the left side of the toilet?

Asked by: Toilet101
The handle is on the left side.
Answered by: CommunityAnswer
Date published: 2017-07-15

does the toliet seat and cover that comes with the unit is slow quiet drop

Asked by: frank
yes it is slow closing and better quality than most seats included with toilet
Answered by: fatboy
Date published: 2016-11-10

I am looking for 2 kohler toilets. I like the look of the San Rapheal and I prefer the comfort heiight. I noticed there are different prices

for what looks like the same toilet. Could you explain. Also, I want a quiet flush. What do you recommend.
Asked by: Anonymous
Hello Lisa, The flushing type mechanism, color, lid closure upgrade and seat choice (round & elongated) will effect the cost.
Answered by: Eagleye
Date published: 2015-11-05

will this toilet fit under a formica counter extention from bathroom vanity?

Asked by: Anonymous
The unit is 21.5" high, and you may want to leave a few inches so you can remove the lid and get inside the tank if needed. If you have further questions, please call a customer care representative at 800-4-KOHLER.
Answered by: KOHLER Customer Service
Date published: 2016-04-21
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Customer Reviews

San Raphael Comfort Height 1-piece 1 GPF Single Flush Elongated Toilet in Thunder Grey is rated 4.0 out of 5 by 34.
Rated 5 out of 5 by from The best seat in our house. ... The best seat in our house.
Date published: 2017-05-17
Rated 3 out of 5 by from Like the product looks. Product was easy to install. Sometimes needs more than one flush to get... Like the product looks. Product was easy to install. Sometimes needs more than one flush to get toilet paper dropped near front of bowl. Does not always clean waste from sides of bowl. Needs more use of toilet brush than toilets using more water in the flush process. Piston flush is fairly loud.
Date published: 2017-07-18
Rated 5 out of 5 by from I put two of these in my house because of... I put two of these in my house because of the pressure assist it offers. Just got tires of flapper and ball cock problems so decided to try something completely different. They sure flush well and still haven’t clogged them yet. Pricey but I am thinking they are worth it long term…..
Date published: 2017-05-17
Rated 5 out of 5 by from Elegant low profile I installed this toilet in my shop/office bathroom. I chose 1.0 gal/flush because I am on a septic tank. It's pressurized, so it's a louder flush, but it works well. It's compact and well built.
Date published: 2017-04-12
Rated 2 out of 5 by from Looks real nice and fits an odd space under a... Looks real nice and fits an odd space under a window. However it requires at least two flushes, not real happy about that.
Date published: 2017-04-11
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2017-04-21
Rated 5 out of 5 by from Unit was not brokenw ... Unit was not brokenw
Date published: 2017-07-13
Rated 4 out of 5 by from Excellent toilet but some drawbacks I purchased two Kohler San Raphael toilet to replace 25 year old toilets that weren't functioning well and to save water. They are pricey plus I had to pay a plumber $150 to install each toilet. This didn't stop me from then replacing the other two in my house (which were still working) so I now have four. The toilet is high quality and looks beautiful in my bathroom and the comfort height is very nice. The Flushmate technology is powerful and literally sucks everything away. It reminds me of an airplane toilet. Two drawbacks though: 1. Noisy flush but not so much that it prevented me from buying the second pair and 2. It doesn't always flush all the paper so OFTEN requires two flushes. That sort of voids the water saving idea. The great features definitely outweighs the two negatives and would recommend this toilet to anyone searching for a quality, high functioning toilet.
Date published: 2016-08-09
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