KOHLER Highline Classic Comfort Height 2-piece 1.28 GPF Elongated Toilet in Black-K-3658-7 - The Home Depot


Model # K-3658-7

Internet # 203241685

Highline Classic Comfort Height 2-piece 1.28 GPF Elongated Toilet in Black

KOHLER Highline Classic Comfort Height 2-piece 1.28 GPF Elongated Toilet in Black

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$359.06 / each


Model # K-3658-7

Internet # 203241685

With its clean, simple design and efficient performance, this Highline water-conserving toilet combines both style and function. An innovative 1.28-gal. flush setting provides significant water savings of up to 16,500 gal. per year, compared to an old 3.5-gal. toilet, without sacrificing flushing power. The elongated seat and chair-like height ensure comfortable use.

  • Two-piece toilet
  • Elongated bowl offers added room and comfort
  • Comfort height feature offers chair-height seating that makes sitting down and standing up easier for most adults
  • 1.28 gal. per flush
  • Seat not included ( See K-4684-7 )

Info & Guides

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Assembled Depth (in.)  29.5 in  Assembled Height (in.)  30.375 in 
Assembled Width (in.)  19.625 in  Bowl Height (in.)  16.5 
Bowl Rim Height  16.5  Flush Valve Size (in.)  3.25 
Product Depth (in.)  29.5  Product Height (in.)  30.375 
Product Width (in.)  19.625 
Bowl Height  Standard  Bowl Shape  Elongated 
Color Family  Black  Color/Finish  Black Black 
Commercial / Residential  Residential  Dual Flush  No 
Flush Performance Category  Best 8-10  Flushing System  Gravity Fed 
Gallons Per Flush  1.28 gal (US)  MaP Performance Rating  Not Rated 
Material  Vitreous China  Product Weight (lb.)  93 lb 
Returnable  90-Day  Rough In Size  12 
Toilet Features  No Additional Features  Toilet Included Components  Handle 
Trip Lever Location  Left 
Warranty / Certifications
Certifications and Listings  ADA Compliant  Manufacturer Warranty  One Year Limited 


Rated 4.1 out of 5 by 19 reviewers.
Rated 5.0 out of 5.0 by Sleek and functional This product is not only sleek and functional it is quiet when you flush it. It works perfectly in any bathroom space including small two piece bathrooms up to a full bath. We bought toliet for the color so that it matched our oak counter tops and black flooring but were pleasantly suprised by the quality and function.... No problems with this product since we intalled them. September 2, 2014
Rated 5.0 out of 5.0 by Kohler toilets are the best! We have five baths in our home and we finally have five Kohler toilets! NOTHING stops up these toilets! All of us are over six feet so having 16 1/2 and 17inch toilets are very comfortable! March 11, 2014
Rated 5.0 out of 5.0 by Simply beautiful I have wanted to replace the toilet in my guest bath for years. Finally just did it! Got the comfort height BLACK Kohler and it is a beauty. Why did I wait so long? March 4, 2014
Rated 5.0 out of 5.0 by should highly recommend getting a new toilet seat with this purchase. should recommend purchasing a new elongated toilet seat at the same time. they are a different size than the one I currently have. this puts off the installation about a week and is an inconvenience. July 29, 2014
Rated 4.0 out of 5.0 by Highline toilet Clearly a quality toilet.Easy to install.Almost Flushes everything.But for the most part does an excellent job.Happy I bought it. January 13, 2015
Rated 5.0 out of 5.0 by class 5 flush Functions like a dual flush...short flush for normal effort on handle...hold handle for a longer flush...but it isn't needed...performs excellent. Pay no attention to the negative comments from those who don't know what they're doing. March 2, 2015
Rated 5.0 out of 5.0 by a great toilet This toilet does a great job flushing with it's class five technology. It was also easy to install. A good value August 17, 2014
Rated 5.0 out of 5.0 by Totally Satisfied This toilet replaced an eljer that clogged up about once per week. The eljer was a beautiful looking toilet but it was too much trouble. This toilet has NEVER clogged in almost a year. It looks nice and I am now thinking of getting another one for a different bathroom. May 16, 2014
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