Kohler Highline Toilet Review: Is It Worth the Money in 2024?

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The American company Kohler is engaged in the development and production of sanitary ware. This brand is famous for its toilets. I suggest you read my Kohler Highline toilet review so that you can appreciate the advantages of this model.

Here you will learn about all the technical characteristics and features of a two-piece toilet, ideal for any home.

Detailed Kohler Highline Toilet Review

Best Kohler K-3999-0 Highline Comfort Rewiewed

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Product specs
Model Kohler k-3999-0 highline
Dimensions 29 to 1/2 inches (74.9 centimeter) x 18 (45.7 centimeter) x 31 to 1/4 (79.4 centimeter)
Comfort height Yes
Flush type Water Saving Toilets
Certification Watersense
Installation method Floor mounted
Material Vitreous china
Water consumption 1.28 gpf
Bowl shape Elongated
Warranty Ne-year limited warranty

Let’s take a closer look at the Kohler Highline toilet specs and features that will help decide on this model.


This model is made of white Vitreous China, which is durable and resistant to microbes. The general form is standard which means classic, so it’ll fit any interior of the bathroom.


Glass porcelain is a special enamel coating that is applied to ceramics after firing. The result is a white, smooth, and clean product. Similar material is used in this toilet, so it is quite durable and practical in everyday care.

Shape and dimensions

The dimensions of the model are 29 to 1/2 inches (74.9 centimeters) x 18 (45.7 centimeters) x 31 to 1/4 (79.4 centimeters). This toilet has a higher fit than other models. It is more comfortable for adults who are not used to sitting too low.

Please note that this is an elongated version for a more comfortable fit.

kohler highline

Flushing technology

You will definitely love this model’s dual flush. It is convenient to use a large lever for flushing, which is located on the flush tank. Press it twice to make a powerful double flush.

The toilet is equipped with a very powerful flush valve that brings a large amount of water as soon as you press the pedal on the side. This means you’ll be able to remove any blockages without difficulty.

The flush tank has a capacity of 1.28 gallons, which is about 20% less than the 1.6-gallon models. It is due to the international EPA standard requirements, helping you save more water in daily use.

Extra features

This model has some additional features that may take time for you to notice:

  • The height and length correspond to the size of an ordinary chair, which makes the landing more comfortable and familiar;
  • The highest flush performance class eliminates clogging the toilet;
  • Easy three-bolt fastening without the need for complicated tools;
  • Watersense certification is available.

Many customers compare Kohler Highline vs. Cimarron, as they both have the same price range. Two well-known brands in the world of sanitary ware produce quality products, but their models and positioning differ from each other.

The Kohler Highline toilet bowl has a unique concept. This toilet is designed for economical water consumption with powerful flushing. And the case is of a slightly increased size. Most often, the Kohler Highline is purchased by middle-aged and older people.

Price range and warranty

American brand of sanitary ware Kohler produces products of the middle and high price segments. This model of toilet costs up to $300, depending on the configuration. Please note that the kit does not include a sitter, which you can buy separately. For this price, you get a drain cistern, a flush button, and a pedestal, as well as fasteners for mounting the toilet.

The products are covered by the manufacturer’s warranty for 12 months. If a mechanical crack is formed through your fault on the porcelain case, the manufacturer is unlikely to recognize this as a warranty case. However, Kohler Highline toilet problems are very rare. This sanitary ware is of very high quality.

Kohler Highline toilet


This Kohler elongated toilet has 12 inches rough-in diameter. Despite such a large size, this model is in line with EPA international standards, as it consumes 20% less water.

9.5Expert Score

Installation of this toilet is very simple. The set includes three anchor bolts with white plugs in the color of the headboard body. The fixing holes’ location is standard, so you do not have to drill new mounting holes. Simply place the case where required and tighten the bolts to ensure good stability.

Material and Design
Flushing technology
Value for Money
Pros: Cons:
  • Enlarged body size for a comfortable fit;
  • Large flush button;
  • Saving water;
  • Simple installation.
  • The price does not include a flush button.


In my Kohler Highline comfort height toilet reviews, I have compared two alternative variations of this toilet model.

Learn about the differences in the table:

model kohler highline k-3889 kohler highline k-3979
color white biscuit
dimensions 29-1/2″ (74.9cm) x 18″ (45.7cm) x 31-1/4″ (79.4cm) 29-1/2″ (74.9cm) x 18″ (45.7cm) x 31-1/4″ (79.4cm)
comfort height yes yes
installation method floor mounted floor mounted
material vitreous china vitreous china
water consumption 1.28 gpf 1.6 gpf
bowl shape elongated elongated
rough-in 10” 12”

The difference of variations is in three parameters: color (white and biscuit), the volume of the flush tank, and rough-in (10″ and 12″). You can choose the optimal model for your needs.


Kohler K-3999-0 Highline Toilet

Does the Kohler Highline have a powerful enough flush?

Yes, this model of Kohler extended toilet has a powerful flush. It is enough to eliminate any clogging.

What are the main advantages of the Kohler Highline toilet?

The main advantage of this model is the enlarged body. The height of the standard toilet is 15″, and the Kohler Highline toilet has a height up to 18″ with a seat.

Is Kohler a good toilet brand?

Yes, Kohler is a popular American company, which has been producing sanitary ware for over 120 years.

Comfortable and Practical Kohler Highline Toilet

Kohler Highline is a quality American-made toilet with increased height and seat length. It is the best choice for those who are tired of sitting too low or whose legs go numb during the wrong landing. The height of this toilet model is equal to the height of an ordinary chair.

Tell me how comfortable is it for you to sit on a standard toilet model? Would you like a higher toilet like Kohler Highline?

More toilets by Kohler:

9 Total Score
Kohler Highline Toilet Review & Summary

The Kohler Highline classic toilet has an elongated body for a more comfortable fit. It is made of Chinese porcelain, which is highly durable. The white color of the porcelain will stay this way for many years. The flush button is on the left side. It is made in the shape of a lever, so it is convenient to press in any position.

9Expert Score
Material & Design
Flushing technology
Price & Warranty
9.5User's score
Material & Design
Flushing technology
Price & Warranty
  • Enlarged body size for a comfortable fit;
  • Large flush button;
  • Saving water;
  • Simple installation.
  • The price does not include a flush button.
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Gerald Carpenter

My name is Gerald Carpenter and I am a professional plumber in the third generation. My father was a plumber, my grandfather was a plumber. I wish I had records on my other ancestors.

1 Comment
  1. 4.75
    Material & Design
    Flushing technology
    Price & Warranty

    it’s more than comfort height: it’s the easiest one to use for a tall heavyweight person like me, though none of my family complains. Though some say Kohler ones are subject to clogging, I never experienced it with mine, even with partial flush. design is elegant and easy to approach. yYou feel comfortable on it. It was easy to install, though you won’t think of it often.

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