Kohler K-3837-7 Black Black Devonshire 1.28 GPF Two-Piece Elongated Comfort Height Toilet with AquaPiston Technology - Seat Not Included

Item #: bci1810980
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Product Details for the Kohler K-3837-7 in Black Black

This product has additional required/recommended options. To configure, add to your cart.

  • Toilet Seat Required
  • Angle Supply Recommended
  • Wax Ring Kit Required


Devonshire two-piece toilet combines high efficiency with the old-world style of the Devonshire collection. Its single 1.28-gallon flush setting provides significant water savings of up to 16,500 gallons per year (versus an old 3.5-gallon toilet) without sacrificing performance. An elongated bowl and comfortable height ensure ease of use. Lifestyle

Package Includes:

  • K-4438: Devonshire 1.28 GPF toilet tank
  • K-4397: Devonshire elongated Comfort Height toilet bowl

Product Features:

  • Two-piece configuration allows for easier access to the area around the toilet
  • Elongated bowl offers comfort and convenience, extending out an extra 1-1/2" compared to a round configuration
  • Covered under Kohler's 1 year limited warranty
  • The Devonshire Collection captures the elegance of a bygone era with elements reminiscent of old-world design
  • Constructed of durable, easy to clean vitreous china
  • Installs in a floor mounted configuration
  • Features a powerful gravity flush with AquaPiston technology
  • ADA compliant - complies with the standards for toilets set forth by the Americans with Disabilities Act
  • Comfort Height - designed for ease of use, with a higher than average bowl
  • WaterSense certified - toilet uses 20% less water than the current standard while still maintaining superior performance
  • Seat and cover not included with this model

Product Technologies / Benefits:

  • AquaPiston: AquaPiston single flush canister technology uses the force of gravity and a precision-engineered tank, bowl, and trapway to create a strong, efficient siphon during flushing. The canister flush valve's 3:2 ratio optimizes flush performance and resists warping and deterioration, while its durable design features 90% less exposed seal material than a standard 3-inch flapper flush valve, guaranteeing leak-free performance. The light-touch canister requires lower activation force than a flapper, and once activated, allows water to flow into the bowl from all sides (360 degrees), increasing each flush's power and effectiveness.
  • Comfort Height: Comfort Height toilets offer the greatest accessibility and ease of use with a bowl height of between 16-1/2" and 18", the same as a standard chair.
  • WaterSense Certified Product: To help make a difference on a global scale and to further its role as an industry leader in eco-performance practices, Kohler has established partnerships with a number of environmental organizations, including WaterSense. Many Kohler faucets and toilets are equipped with low-flow technology - they use less water, while continuing to meet superior performance standards.

Product Specifications:

  • Overall Height: 30-3/4" (measured from bottom of base to top of tank)
  • Overall Depth: 29-1/4" (measured from back of tank to front of rim)
  • Overall Width: 17-1/4" (measured from rightmost to leftmost edge of toilet)
  • Bowl Height: 16-1/2" (measured from floor to bowl rim)
  • Flow Rate: 1.28 GPF (gallons per flush)
  • Water Area: 11" x 8-3/4" (inner rim dimensions of bowl, length x width)
  • Water Depth (from Rim): 5-1/2"
  • Tank Width: 17-1/4" (measured from leftmost to rightmost edge of tank)
  • Tank Depth: 7-13/16" (measured from back edge to front edge of tank)
  • Trapway (Discharge Passageway) Size: 2-1/8"
  • Distance Between Toilet Seat Installation Holes: 5-1/2"
  • Rough-In: 12"



This model with right hand trip lever

About Kohler:

Gracious living is characterized by qualities of charm, good taste, generosity of spirit, and the enhancement of nature. It is Kohler's mission that you improve your sense of gracious living with every experience you have with a Kohler product or service. Kohler lives on the leading edge of design and technology, while maintaining a constant level of quality, regardless of price. It sets the standard of excellence in its field, and yet is constantly striving to improve. From sustainable products in the kitchen and bath to power systems that protect data centers and urban landscapes all over the world - this is what the Kohler company is all about.

Our SKU: Kohler K-3837

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

Kohler K-3837 Reviews

Rated 5 out of 5 by from our favorite We've had this toilet for two years, and are very happy with the way it looks, sounds, and works, so much so that we are replacing another toilet with this one now.
Date published: 2013-06-04
Rated 5 out of 5 by from Great Toilet This is a great toilet. It's beautiful and functional. I've seen complaints online about the noise. While it is a little nosier than a standard gravity flushed toilet, I wouldn't call it loud. It seems to have no trouble flushing solid waste in one flush. We bought the soft close toilet seat for this toilet. It works like a charm, although I do find it slightly uncomfortable to sit on. My wife had no complaints, so it might just be me.
Date published: 2013-03-14
Rated 5 out of 5 by from Super flush Installed five of these in my house. Great toilets with Class 5 flushing. No fitment issues. Quick flush isn't the quietest but I'll take performance over sound. Looks great at a great price point. Highly recommend the newer all rubber seals instead of the wax.
Date published: 2012-08-05
Rated 1 out of 5 by from Do Not Purchase Despite having this toilet installed by a professional plumber who explicitly followed the specifications from Kohler the toilet sits with the tank 2 1/2 inches off the wall. Looks completely awful. The base cannot be moved back further against the wall even if I could change the specified 12 inch rough in. Kohler's design has such a deep base it can't be done. Very poorly designed. Now because it is already installed it cannot be returned. I would definitely NOT recommend this product.
Date published: 2012-06-12
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9 Questions from the Community
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Is the K-3837 a quiet flush?

The Kohler K-3837 is an eco-friendly toilet with a class 5 system: Class Five provides tremendous bulk waste flushing performance and best-in-class bowl cleanliness. It is not considered one of their very quiet models, but it will not be extremely loud. Thank you for the question.

What seat fits this toilet?

Thanks for your question. The Kohler K-3837 is recommended to be used with K-4688.

How high is toliet from seat to floor?

The Kohler K-3837 is 16.5" from the floor to the rim of the toilet and the seat should add another 1/2 inch.

What is meant by "Less seat and supply"?

The Kohler K-3837 does not include the toilet seat or the angle supply. These parts are recommended, but not required. The angle supply will be recommended when you add this item to the cart and any of the Kohler elongated toilet seats will work.

How long is this toilet from front to back

The Kohler K-3837 is 29 1/4" from the front to the back of the toilet.

What soft close/quiet close seat fits this toilet?

The K-3837 toilet fits with the K-4733 quite close toilet seat.

What is the difference in a 10" and a 12" rough in?

The Rough in measurement is from the wall to the bolts the secures the toilet to the ground.  This measurement needs to be correct in order to purchase the right toilet.

Is this available in grey?

The Kohler K-3837 is offered in ice grey.

Does this toilet come with a trip lever?

Yes, the Kohler K-3837 does come with the trip lever.

Kohler K-3837 Technical Specs

Bowl Height 16.5
Bowl Shape Elongated
CA Drought Compliant Yes
Comfort Height Yes
Concealed Trapway No
Configuration Two Piece
Country Of Origin USA
Depth 29.25
Flush Type Gravity Flush
Gallons Per Flush 1.28
Height 30.75
Installation Type Floor Mounted
Insulated Tank No
Length 29.25
Made in America Yes
Material Vitreous China
Rough In 12
Seat Included No
Theme Traditional
Trapway 2.125, 2.13
Trip Lever Placement Left
Water Efficient Yes
WaterSense Certified Yes
Width 17.25

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