KOHLER Adair® One-Piece Compact Elongated Toilet

Space-Saving Style Without Giving Up Comfort

The KOHLER Adair is designed for homeowners who need a toilet that works gracefully in a smaller bathroom without looking or feeling like a compromise.

Compact One-Piece Design

Comfort Height®

AquaPiston® Flush

28⅝" Overall Depth

Its slim tank, streamlined one-piece construction and elongated bowl give the Adair a refined, space-conscious profile that works particularly well in powder rooms, condos, older homes and bathrooms where every inch matters.

KOHLER specifically describes the Adair as a compact choice designed to fit gracefully into smaller spaces, while its elongated bowl still provides the added room and comfort many homeowners prefer.

The Adair also combines Comfort Height® seating, AquaPiston® flushing, a fully glazed 2⅛-inch trapway and an included Quiet-Close™ elongated seat.

Why Homeowners Choose the KOHLER Adair

Designed for smaller bathrooms

The Adair measures approximately 28⅝ inches front-to-back, giving it a relatively compact footprint for an elongated one-piece toilet.

Elongated comfort

Unlike many compact toilets that rely on a round-front bowl, the Adair retains an elongated bowl for added seating room and comfort.

Comfort Height® seating

KOHLER’s Comfort Height® design provides a chair-height seating position designed to make sitting down and standing up easier for many adults.

One-piece construction

The tank and bowl are integrated into a single fixture, eliminating the gap found between the tank and bowl of a conventional two-piece toilet. That gives the Adair a cleaner appearance and makes the exterior easier to wipe down.

Flushing System

AquaPiston® Flushing Technology

The Adair uses KOHLER’s AquaPiston® canister flushing system.

What makes this system effective:

Strong, Efficient Flushing

AquaPiston is designed to optimize the flow of water from the tank into the bowl, harnessing gravity to increase the power and effectiveness of the flush. The canister design also uses significantly less exposed seal material than a conventional flapper, helping resist conditions that can contribute to wear, shrinking and swelling over time. Combined with the precision-engineered bowl and trapway, the system is designed to provide reliable everyday flushing while using just 1.28 gallons per flush.

Quiet-Close™ Seat Included

The Adair includes a KOHLER Cachet® Quiet-Close™ elongated toilet seat. The seat closes gradually to help prevent slamming and can quickly unlatch from the toilet for easier removal and cleaning. That means homeowners do not need to purchase a separate basic seat to complete the installation.

Compact Does Not Have to Mean Low

The Adair uses KOHLER’s Comfort Height® design. The bowl rim is approximately 16½ inches high, before the toilet seat is added. That creates a chair-height seating position that can be more comfortable for many adults than a traditional lower toilet. The elongated bowl provides additional front-to-back seating room, making the Adair well suited for bathrooms where both comfort and space matter.

This system is designed for consistent, high-performance flushing, making it a smart choice for homeowners who want stronger results without moving to premium-priced models.

Schedule your installation today.

Construction & Design

A compact bathroom does not necessarily mean homeowners need to settle for a basic round-front toilet. Older homes, condos, townhouses and powder rooms often present challenges such as:

Limited front-to-back space
Tight clearance between the toilet and vanity
Door swing near the toilet
Narrow walking areas
Older layouts designed around smaller fixtures
Limited space between the toilet and tub or shower

Streamlined One-Piece Styling

The Adair’s one-piece construction integrates the tank and bowl into a single fixture.

Slim tank profile

The relatively narrow tank helps the toilet feel less bulky in a smaller bathroom.

Seamless exterior

With no separate tank-to-bowl joint, the Adair has fewer seams and crevices where dust and grime can collect.

Elongated bowl

The elongated bowl provides additional seating room while maintaining a space-conscious overall profile.

Traditional exposed trapway

The Adair uses an exposed trapway, giving it a familiar residential toilet appearance while maintaining its streamlined one-piece design.

Design for Everyday Comfort

The ToiletKing Compact Collection is designed around toilets that address these real-world space constraints while still providing modern comfort and performance.

One-piece toilet

Elongated bowl

Compact, space-conscious design

Comfort Height® seating

AquaPiston® flushing system

1.28 gallons per flush

Cachet® Quiet-Close™ elongated seat included

Left-hand polished chrome trip lever

Vitreous china

EPA WaterSense® certified

Available in multiple KOHLER finishes

Pricing & Value

Choosing a toilet for a compact bathroom requires more than simply checking whether the rough-in is 12 inches. ToiletKing can help evaluate:

Overall toilet depth
Tank height
Rough-in
Vanity clearance
Door swing
Tub or shower clearance
Walking space
Water-supply location

That is especially important in older Arlington, Alexandria and Washington, DC-area bathrooms, where layouts were often designed around smaller fixtures.

What’s Included in the Standard Plan:

Is This Toilet Right For You?

Great Fit If You Want:

A toilet for a smaller bathroom
A compact one-piece toilet
An elongated bowl
Comfort Height® seating
AquaPiston® flushing
A Quiet-Close™ seat included
A streamlined, refined appearance
Efficient 1.28 GPF operation
A standard 12-inch rough-in
A compact toilet that does not look basic or utilitarian

Consider Upgrading If You Want:

An especially low tank for placement beneath a vanity or shelf
A toilet specifically designed around a round-front footprint
A fully skirted exterior
An extra-tall Mobility Collection toilet
Built-in bidet functionality
A rough-in other than 12 inches

This is the toilet for me.

What Most Northern Virginia and Maryland Homeowners Do

The KOHLER Adair Is Perfect For

Small bathrooms
Powder rooms
Older homes
Condos
Apartments
Arlington homes with tighter bathroom layouts
Alexandria townhouses and older homes
Washington, DC bathrooms
Homeowners who want an elongated bowl
Homeowners who prefer one-piece toilets
Bathrooms where Comfort Height® is preferred
Space-conscious remodeling projects
Homeowners who want a compact toilet with a more refined appearance

Why ToiletKing?

Big box stores sell toilets. ToiletKing installs them the right way.

Local Northern Virginia & Maryland specialists

Fast, clean installation

Code-compliant work

No hassle, no guesswork

Backed by 5-star reviews from homeowners across Northern Virginia.

The KOHLER Adair® One-Piece Compact Elongated Toilet is Perfect For

Northern Virginia Service Area

Arlington
Alexandria
Loudoun County
Fairfax County
Prince William County

Maryland Service Area

Montgomery County
Prince George’s County
Frederick County

Frequently Asked Questions

Is the KOHLER Adair good for a small bathroom?

Yes. KOHLER specifically describes the Adair as a compact choice whose slim tank and streamlined forms fit gracefully into smaller spaces.

Is the KOHLER Adair elongated?

Yes. The Adair has an elongated bowl designed to provide additional seating room and comfort.

How deep is the KOHLER Adair?

The specification drawing shows an overall depth of approximately 28⅝ inches.

How tall is the KOHLER Adair?

The toilet is approximately 28½ inches high overall.

How high is the bowl?

The bowl rim is approximately 16½ inches high before the seat is added.

Is the Adair Comfort Height®?

Yes. KOHLER classifies the Adair as Comfort Height®, providing chair-height seating designed to make sitting down and standing up easier for many adults.

Does the Adair come with a toilet seat?

Yes. It includes a Cachet® Quiet-Close™ elongated seat that can quickly unlatch for easier cleaning.

What flushing system does it use?

The Adair uses KOHLER’s AquaPiston® canister flushing system.

How much water does it use?

The Adair uses 1.28 gallons per flush.

What size trapway does it have?

The Adair has a 2⅛-inch fully glazed trapway.

Is the trapway skirted?

No. The Adair has an exposed trapway.

What rough-in does it require?

The Adair is designed for a standard 12-inch rough-in.

Is the Adair WaterSense® certified?

Yes. It is EPA WaterSense® certified.

Is the KOHLER Adair ADA compliant?

It can meet ADA and other applicable accessibility standards when installed according to the specific requirements of those standards.

Can the KOHLER Adair replace a round-front toilet?

Potentially, but compatibility depends on the actual bathroom layout. The Adair is approximately 28⅝ inches deep, so ToiletKing should verify front clearance, vanity clearance, door swing and surrounding fixtures before installation.

Who installs compact KOHLER toilets in Arlington, Alexandria and Washington, DC?

ToiletKing professionally installs KOHLER Compact Collection toilets throughout Northern Virginia, Washington, DC and neighboring Maryland communities.

Small Bathroom. Full-Size Comfort.

The KOHLER Adair combines a compact, streamlined one-piece design with an elongated bowl, Comfort Height® seating, AquaPiston® flushing and an included Quiet-Close™ seat.

For homeowners who need to make better use of bathroom space but do not want their toilet to look or feel like a compromise, the Adair is a natural fit for the ToiletKing Compact Collection.

Compact footprint. Elongated comfort. Refined KOHLER design.