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The Kohler Adair Toilet Review

Last updated: Nov 25th, 2024 by Tyler White

 Note: We’re supported by our readers. We earn a commission from product purchases using affiliate links on our site. You help keep us growing! 

Welcome to another extended toilet review of another trusted Kohler model called the Adair.

We cover all the bases in this review looking at the flush performance, type of flush, our thoughts on the design and we’ve included useful information such as other Kohler Adair models to choose, product spec sheets and links to the manufactures listing.

Also, don’t forget to check out the positives and negatives we spotted and the extra buying options we’ve added all right below!

Kohler Adair Toilet Extended Review of 2025

We took a close look at the features and benefits of the Adair toilet in this review.

A white Kohler Adair toilet within a bathroom and two isolated views of the same model. "Kohler Adair" text is shown.

“The Adair is a solid unit that showcases some of Kohler’s best attributes in action, such as suction strength and leak-free design.”

Pros and Cons

  • AquaPiston canister increases water flow for excellent suction strength
  • 1.28 GPF
  • ADA compliant
  • Fantastic color selection
  • On the expensive side for a non-smart toilet
Feature List

Flush Specs

  • › Flush System –  AquaPiston®
  • › Water Consumption –  1.28 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • › Type – SingleFlush Type ExplainedA single flush is one press of the lever for a full flush. A dual flush allows the option for a partial or full flush.
  • › Flush Score – 1000 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000

Design & Style

  • › Style – One-PieceStyle ExplainedTwo-piece toilets has a separate tank and bowl. One-piece toilet has a seamless design of the tank and bowl.
  • › Bowl Shape –  ElongatedShape ExplainedElongated bowls are oval shaped and 2” inches wider than round bowls
  • › Bowl Glaze –  N/A
  • › Trapway Style –  Exposed

Dimensions

  • › Toilet Measurements – 28-9/16″ x 16-5/16″ x 28-7/16″
  • › Rough-inWhat is a Rough-in?Measurement between center of waste pipe and wall –  12″
  • › Trapway SizeWhat is a Trapway?S-shaped curved channel inside the base of the toilet. Waste travels from the bowl through the trapway, then out the bottom of the toilet. – 2-1/8″
  • › Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. – 17-1/4″
  • › Rim Height – 16-1/2″
See toilet dimensions
Adair-dimension-1 Adair-dimension-2

 

CHECK – HOME DEPOT PRICE             CHECK – AMAZON PRICE

We at Toiletable are big fans of Kohler. The company is known for well-built models that prioritize user experience. The Adair is no different.

Image of the Kohler Adair toilet with features such as ADA compliance, Aqua Piston Flush Technology, and Cachet Quiet-Close seat.

Flushing Performance

One of the most impressive parts of the Adair is its AquaPiston canister which increases water flow and streams across every side of the bowl. The high-quality canister withstands the test of time through its durable non-deteriorating material. The canister also has a low actuation force making flushing as simple as can be.

The Adair also has a 3:2 flush valve ratio that optimizes flush performance and a reliable canister design has 90% less exposed seal material than traditional three-inch flappers, reducing chance of leakage.

This unit utilizes 1.28 gallons per flush, saving you thousands of gallons a year, when compared to traditional 1.6 gallons per flush units.

Smart Design

This one-piece ADA-compliant unit has a Comfort Height of 16.5” and a comfortable elongated bowl. Comfort Height toilets simulate a standard chair-like setting, allowing users to easily sit and stand up.

We’ve reviewed hundreds of toilets and one of the most frustrating parts is when an excellent toilet does not come with a matching toilet seat. Well, with the Adair this problem ceases to exist thanks to the inclusion of the Cachet Quiet-Close elongated seat. The Quiet-Close seat resists wear-and-tear by preventing annoying seat clanging.

A white Kohler Adair toilet with features listed: chrome trip lever, 1.28 GPF, easy-to-clean and Quiet-Close™ seat. The toilet is available in white, biscuit, dune, ice grey, black black. In addition to a seat, the toilet comes with a tank, bowl, bolt cap accessory pack, tank accessory pack, and tank cover. A left-hand chrome polished trip lever is included as well.

This toilet uses a standard 2 ⅛” trapway. The concealed trapway simplifies cleaning by eliminating potential spots that may harbor bacteria and grime. The toilet’s curved tank is sleek, soft, and glossy. The tank lid is stable enough to put things on.

If you are looking for a more luxurious seat, the Adair is compatible with the Nightlight Quiet-Close elongated seat, which lights up the bowl so you don’t have to turn on the lights on your nighttime bathroom trips.

If you’re looking for a bidet-like situation, try the elongated cleansing toilet. It’s a removable bidet seat that provides a spa-like experience for the fraction of a smart toilet.

Color Options

[su_panel]
  • White (0)
  • Biscuit (96)
    Dune (NY)
    Ice Grey (95)
    Black Black (7)
[/su_panel]

Seat Options

[su_panel]
  • K-8298 PureWash® E590 Elongated bidet toilet seat (not included)
[/su_panel]

Product Documentation

[su_panel]
  • Spec Sheet (PDF)
  • Manufacturer Product Listing
[/su_panel]

READ REVIEWS

Other Adair Models

Two white toilets by Kohler shown with variations: left with a standard trip lever, right with a right-handed trip lever.

Summary of Customer Reviews

Not many reviews are available for the Adair. The positive ones tend to focus on the Adair’s effective flushing mechanism and durability. Another complaint is that the toilet is a bit pricey for a non-smart toilet. However, the Adair does come with a Quiet-Close seat which is a plus.

Category iconKohler,  Toilets

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