Model # K-3979-7

Internet #205037404

KOHLER Highline 2-piece 1.6 GPF Single Flush Elongated Toilet in Black Black


Highline 2-piece 1.6 GPF Single Flush Elongated Toilet in Black Black

  • Comfort Height offers chair-height seating (about 2 in. taller)
  • Class 5 Flush exposes 90% less seal material (see video)
  • Toilet seat sold separately
$35906 /each

Choose Your Options

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

Product Overview

Innovative features and performance have made Highline toilets an industry benchmark since 1966. Continuing the tradition is this 2-piece Highline toilet, which provides a standard chair height and an elongated bowl for maximum comfort. Precision engineering delivers powerful flushing at 1.6 GPF. With its versatile looks, Highline complements a variety of bathroom styles.

  • 2-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
  • 1.6 GPF
  • Standard left-hand polished chrome trip lever included
  • Combination consists of the K-4468 tank and the K-4199 bowl
  • Single-flush gravity uses the force of gravity and a precision-engineered tank, bowl and trap-way to create a strong siphon during flushing
  • 3-bolt installation
  • Class Five flushing technology offers plug- and leak-free performance, extraordinary flushing and better rinsing power for a cleaner bowl
  • Features to consider when buying a toilet

Info & Guides

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Bowl Height without Seat (in.)
Flush Valve Size (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Bowl Height
Chair Height
Bowl Shape
Color Family
Black Black
Commercial / Residential
No Additional Features
Flushing Mechanism
Gravity Flush
Flushing Technology
Gravity Fed
Flushing Type
Single Flush
Gallons Per Flush
MaP Performance Rating
Vitreous China
Mount Location
Floor Mount
Product Weight (lb.)
Rough In Size
Toilet Type
Trapway Diameter (in.)
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

If a product is unavailable online, is it possible that it will be in the store?

Asked by: northwoods
No. Special Order only
Answered by: Downandout
Date published: 2016-10-07

what is rough in size ?

what is rough in size ?
Asked by: arnie
Hello, my name is Sarah with Kohler Customer Service. I'm glad to answer your question. This toilet features a standard 12" rough in. Thank you for choosing KOHLER.
Answered by: Kohler Product Expert
Date published: 2017-05-09

K3979-96 does it need any special supplies to install it and use it.

Purchased a K-3979-96 and I would like to know what other supplies I need to install it. ? I have to bowl and the tank in there boxes.
Asked by: mb
Hello, my name is John with KOHLER Customer Service. I am happy to assist you with your question. I apologize you were unable to find the information you were looking for. Recommended optional accessories for the 3979 Highline toilet would be: toilet seat (example 4636 or 7315), Angle Supply (example 7637), wax ring kit (example 1023457). For additional assistance on this inquiry, please contact our Customer Care Center at 1-800-4KOHLER. (1-800-456-4537) Thank you for your inquiry and choosing the Bold Look of KOHLER.
Answered by: Kohler Product Expert
Date published: 2016-09-06

Is seat included?

Asked by: WacondaVol
Hello, my name is Jay with KOHLER Customer Service. I am happy to assist you with your toilet seat question. The seat is not included on the 3979-7. Please work with your local Home Depot for pricing and availability on a new seat. Thank you for choosing the Bold Look of KOHLER.
Answered by: KOHLER Customer Service
Date published: 2015-11-25
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Customer Reviews

Highline 2-piece 1.6 GPF Single Flush Elongated Toilet in Black Black is rated 2.5 out of 5 by 2.
Rated 4 out of 5 by from Works real well looks nice, works great. we plugged our old 3 gpf toilet all the time. We can't seem to plug this one. Get a good seat though, we bought a cheap one and it broke soon after install.
Date published: 2016-07-22
Rated 1 out of 5 by from Poor Quality Control Toilet I purchased was not made in the USA. Quality Control was non-existent. Poor casting. Make sure to open the box and check for defects before you leave the store.
Date published: 2015-04-13
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