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Model # K-3658-7

Internet # 203241685

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

This item has been discontinued.
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$359.06 /each

  • Toilet seat sold separately




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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Bowl Height (in.) 
Flush Valve Size (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Bowl Height 
Comfort Height 
Bowl Shape 
Color Family 
Black Black 
Commercial / Residential 
Flushing Mechanism 
Gravity Flush 
Flushing Technology 
Gravity Fed 
Flushing Type 
Single Flush 
Gallons Per Flush 
1.28 gal (US) 
MaP Performance Rating 
Not Rated 
Vitreous China 
Product Weight (lb.) 
93 lb 
Rough In Size 
Toilet Features 
No Additional Features 
Toilet Included Components 
Trip Lever Location 
Trip Lever Location 
Left Side 
Warranty / Certifications
Certifications and Listings 
ADA Compliant 
Manufacturer Warranty 
One Year Limited 


Rated 4.1 out of 5 by 24 reviewers.
Rated 5.0 out of 5.0 by Great Seat Highline classic 2 piece toilet was just what I was looking for. Old toilet no longer flushed correctly and need something new and in black. This was just what I wanted. May 7, 2015
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 1.0 out of 5.0 by Ineffective at flushing solid waste The supposed effecient use of only 1.28 GPF is misleading when you factor in the number of times this toilet clogs on solid waste and then the number of flushes combined with a plunger to move the solid waste on. With several flushes requred to move on solid waste in combination with a plunger this actually uses more water than our previous standard 1.6 GPF toilet. This toilet clogs on solid waste regularly (almost daily with regular use shared by two people) and unclogging it with a plunger is difficult because of the specially formed flush channel in the bowl that makes it difficult to get a good seal around the bowl drain. After only a month we are getting rid of this toilet because of the constant frustration of it plugging up. July 31, 2015
Rated 5.0 out of 5.0 by KOHLER HIGH TOILET Oh how nice to be two inches higher. This toilet is amazing. The flush is fast and quiet and does the job immediately. It has a classical design and looks great in the bathroom. I highly recommend this toilet. May 12, 2015
Rated 2.0 out of 5.0 by Incomplete flush Does not flush bowl contents entiely (#2). Very disappointing for such an otherwise quality toilet. Simply does not perform. Very embarrasing if you have company, for them and for you. November 5, 2014
  • 2015-10-08T09:49:54.986-05:00
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