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KOHLER Highline® Two-Piece Elongated Toilet with Revolution 360®

Powerful Flushing. Better Bowl Cleaning. Everyday Comfort.

The KOHLER Highline® is a water-efficient, two-piece elongated toilet designed for homeowners who prioritize strong flushing performance, enhanced bowl cleaning and comfortable chair-height seating.
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Revolution 360®

AquaPiston® Power

Comfort Height®

WaterSense® Certified

Installed Right

Offered as part of ToiletKing’s Deluxe Line, the Highline combines two of Kohler’s proven flushing technologies. AquaPiston® optimizes the flow of water from the tank to increase the power and effectiveness of the flush, while Revolution 360® generates a forceful swirling motion inside the bowl to help keep it cleaner longer.

The Highline also features Comfort Height® seating, an elongated bowl, a fully glazed 2-1/8-inch trapway, a sanitary guard for easier cleaning, WaterSense® certification and efficient 1.28 GPF operation.

For Northern Virginia and Maryland homeowners looking for a dependable performance upgrade without paying primarily for designer styling, the Highline offers an excellent combination of KOHLER engineering, flushing technology, comfort, water efficiency and value.

What Makes the KOHLER Highline Different?

Two KOHLER Flushing Technologies Working Together

The biggest difference between this Highline and a conventional two-piece toilet is what happens during the flush.
The AquaPiston® canister optimizes how water flows from the tank, while Revolution 360® creates the forceful swirling action inside the bowl.
Together, these technologies are designed to deliver effective flushing while providing enhanced bowl rinsing.

Revolution 360® Flushing Technology

KOHLER Revolution 360® generates a forceful swirling motion inside the bowl designed to help keep the bowl cleaner longer.
For homeowners, the benefit is simple: enhanced bowl rinsing with every flush.

AquaPiston® Flushing Technology

nside the tank, KOHLER's AquaPiston® canister optimizes water flow and harnesses gravity and a powerful cascade of water to increase the power and effectiveness of the flush.
KOHLER also designed AquaPiston® with 90% less exposed seal material than a traditional 3-inch flapper, helping it resist conditions that can contribute to wear, tearing, shrinkage and swelling over time.

1.28 Gallons Per Flush

The Highline delivers its flushing and bowl-rinsing performance while using just 1.28 gallons of water per flush and carries EPA WaterSense® certification.

Flushing System

Why Choose the KOHLER Highline with Revolution 360®?

Is the KOHLER Highline a Good-Flushing Toilet?

Yes. Flushing Technology Is One of Its Biggest Strengths.

The KOHLER Highline K-43999 combines AquaPiston® water delivery with Revolution 360® bowl rinsing, making flushing technology one of the primary reasons to choose this toilet.

AquaPiston® is engineered to optimize water movement from the tank, while Revolution 360® creates the swirling action that improves the rinse inside the bowl. 

That makes the Highline particularly appealing for homeowners replacing an older toilet because they’re frustrated with weak flushing or inadequate bowl rinsing.

Does the KOHLER Highline Help Keep the Bowl Cleaner?

Yes. Revolution 360® Is Designed for Enhanced Bowl Rinsing.

Revolution 360® creates a forceful swirling motion inside the bowl, which KOHLER says helps keep the bowl cleaner longer. 

The Highline also incorporates a sanitary guard where the bowl and tank meet, helping make another traditionally awkward area of a two-piece toilet easier to clean. 

It’s important to distinguish this from a self-cleaning toilet—you’ll still need to clean the bowl normally. Instead, the flushing system is designed to provide better bowl rinsing during everyday use.

What makes this system effective:

Two KOHLER Flushing Technologies Working Together

The biggest difference between this Highline and a conventional two-piece toilet is what happens during the flush.
The AquaPiston® canister optimizes how water flows from the tank, while Revolution 360® creates the forceful swirling action inside the bowl.
Together, these technologies are designed to deliver effective flushing while providing enhanced bowl rinsing.

Revolution 360® Flushing Technology

KOHLER Revolution 360® generates a forceful swirling motion inside the bowl designed to help keep the bowl cleaner longer.
For homeowners, the benefit is simple: enhanced bowl rinsing with every flush.

AquaPiston® Flushing Technology

Inside the tank, KOHLER's AquaPiston® canister optimizes water flow and harnesses gravity and a powerful cascade of water to increase the power and effectiveness of the flush.
KOHLER also designed AquaPiston® with 90% less exposed seal material than a traditional 3-inch flapper, helping it resist conditions that can contribute to wear, tearing, shrinkage and swelling over time.

1.28 Gallons Per Flush

The Highline delivers its flushing and bowl-rinsing performance while using just 1.28 gallons of water per flush and carries EPA WaterSense® certification.

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.

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Construction & Design

What's Included in Your Deluxe Line Installation?

The Highline combines two features many homeowners specifically look for when replacing an older toilet: Comfort Height® seating and an elongated bowl.

Comfort Height® Seating

KOHLER’s Comfort Height® design provides chair-height seating that makes sitting down and standing up easier for most adults. 

This can be particularly appealing for taller adults, older homeowners and anyone who finds traditional lower toilets uncomfortable.

Elongated Bowl

The elongated bowl provides additional room and comfort compared with a traditional round-front toilet. 

For primary bathrooms and frequently used family bathrooms, many adults prefer the additional seating room of an elongated toilet.

Practical KOHLER Design Built for Everyday Living

The Highline isn't intended to be a decorative statement piece. Its appeal is its familiar, versatile two-piece design combined with sophisticated technology where it matters most.

Two-Piece Construction

The Highline uses a traditional two-piece configuration with separate tank and bowl, giving it a familiar appearance that works well across a wide variety of bathroom styles. KOHLER also notes that this newer Highline weighs less than previous Highline models. 

Fully Glazed 2-1/8-Inch Trapway

The Highline incorporates a 2-1/8-inch fully glazed trapway, providing a smooth interior passage as waste moves through the toilet. 

Sanitary Guard

A sanitary guard where the bowl and tank meet helps make this traditionally difficult-to-reach area easier to clean. 

Exposed Trapway Design

Unlike the skirted toilets found elsewhere in ToiletKing's premium offerings, the Highline uses a traditional exposed trapway.

Design for Everyday Comfort

The KOHLER Highline isn’t about adding features simply for the sake of having them. Its upgrades are concentrated on things homeowners experience every day:

Better flushing. Better bowl rinsing. Comfortable seating. Efficient water use. Dependable performance.

The combination of Comfort Height® seating, an elongated bowl, AquaPiston® flushing and Revolution 360® technology makes the Highline particularly well suited for primary bathrooms, family bathrooms and other frequently used spaces.

Key Specifications

  • Two-piece toilet
  • 1.28 gallons per flush
  • Revolution 360® flushing technology
  • AquaPiston® canister technology
  • Comfort Height® seating
  • Elongated bowl
  • 2-1/8-inch fully glazed trapway
  • Sanitary guard for easier cleaning
  • Exposed trapway design
  • Standard 12-inch rough-in
  • Left-hand polished chrome trip lever
  • EPA WaterSense®
  • ADA compliant when installed according to applicable requirements
  • Available in White, Biscuit and Black Black
  • KOHLER® Toilets and Seats Limited Warranty

Pricing & Value

What's Included in Your Deluxe Line Installation?

When you purchase the KOHLER Highline through ToiletKing, you’re purchasing a complete toilet replacement service, not simply a toilet in a box.

Your Installation Includes:

✔ KOHLER Highline toilet and seat
✔ Professional precision installation
✔ Removal and haul-away of your existing toilet
✔ New wax seal
✔ Secure mounting
✔ Leak-free water connection
✔ Flush and performance testing
✔ Complete cleanup

Why Professional Toilet Installation Matters

A toilet’s performance depends on more than the fixture itself.

Proper seating, sealing, leveling and water connections help prevent problems such as leaks, rocking, odors and premature seal failure.

ToiletKing professionally installs and tests your new KOHLER Highline before we leave, so it’s ready for dependable everyday use.

What’s Included in the Standard Plan:

  • KOHLER Highline® Two-Piece Elongated Toilet with Revolution 360®
  • Professional, precision installation
  • Removal & haul-away of old toilet
  • New wax seal & secure mounting
  • Leak-free connection
  • Flush & performance testing
  • Clean workspace

Is This Toilet Right For You?

Great Fit If You Want:

  • Advanced KOHLER flushing technology
  • Enhanced bowl rinsing
  • Comfortable chair-height seating
  • An elongated bowl
  • Water-efficient 1.28 GPF operation
  • WaterSense® certification
  • Proven KOHLER engineering
  • A traditional two-piece design
  • A performance-focused upgrade without moving into a designer-style toilet
  • A strong balance of comfort, performance and value

This is the toilet for me.

Install my Throne

What Most Northern Virginia and Maryland Homeowners Do

The KOHLER Highline K-43999 is a strong choice for homeowners who want an elongated, chair-height toilet with advanced flushing and bowl-cleaning technology.

Its biggest advantages include:

  • Revolution 360® enhanced bowl rinsing
  • AquaPiston® flushing technology
  • Comfort Height® chair-height seating
  • Comfortable elongated bowl
  • Water-efficient 1.28 GPF operation
  • WaterSense® certification
  • Fully glazed 2-1/8-inch trapway
  • Sanitary guard for easier cleaning
  • Proven KOHLER engineering 

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 Highline® Two-Piece Elongated Toilet with Revolution 360® is Perfect For

ToiletKing recommends the Highline as a Deluxe Line option for homeowners who place flushing performance, comfort and value ahead of decorative styling.

Northern Virginia Service Area

  • Arlington
  • Alexandria
  • Loudoun County
  • Fairfax County
  • Frederick County
  • Prince William County

Maryland Service Area

  • Montgomery County
  • Prince George County

Frequently Asked Questions

Is the KOHLER Highline a good toilet?
Yes. The KOHLER Highlineis particularly well suited for homeowners looking for advanced flushing technology, enhanced bowl rinsing, chair-height comfort and an elongated bowl. ToiletKing includes it in our Deluxe Line because it provides meaningful performance and comfort upgrades while retaining a practical two-piece design.
What is Revolution 360® flushing technology?
Revolution 360® is KOHLER's bowl-rinsing technology that generates a forceful swirling motion inside the bowl. It's designed to provide enhanced bowl rinsing and help keep the bowl cleaner longer.
What is KOHLER AquaPiston®?
AquaPiston® is KOHLER's canister-style flushing technology. It optimizes water flow from the tank and harnesses gravity and a powerful cascade of water to increase the power and effectiveness of the flush.
Does the KOHLER Highline have both Revolution 360® and AquaPiston®?
Yes. The Highline combines AquaPiston® canister technology with Revolution 360® flushing technology, giving the toilet both optimized water delivery and enhanced bowl rinsing.
Is the KOHLER Highline a comfort-height toilet?
Yes. The Highline features KOHLER Comfort Height® seating, which provides chair-height seating designed to make sitting down and standing up easier for most adults.
Is the KOHLER Highline elongated?
Yes. It has an elongated bowl, providing additional room and comfort compared with a traditional round-front toilet.
How much water does the KOHLER Highline use?
The Highline uses 1.28 gallons per flush and is EPA WaterSense® certified.
Does Revolution 360® mean I won't have to clean the toilet?
No. Revolution 360® is designed to enhance bowl rinsing and help keep the bowl cleaner longer, but the toilet still requires normal household cleaning.
Is the KOHLER Highline WaterSense® certified?
Yes. The toilet meets EPA WaterSense® requirements while using 1.28 gallons per flush.
Is the KOHLER Highline ADA compliant?
The K-43999 is listed as ADA compliant when installed according to the specific requirements of the applicable regulations. Its Comfort Height® design provides chair-height seating that makes sitting down and standing up easier for most adults.
Does the KOHLER Highline come in colors other than white?
Yes. KOHLER lists it in White, Biscuit and Black Black. ToiletKing can confirm availability, additional pricing and delivery times for non-white finishes when you order.
Can I add a bidet seat to the KOHLER Highline?
Yes. KOHLER specifically lists an elongated bidet toilet seat among the recommended accessories for the Highline. ToiletKing also offers several compatible non-electric and electronic bidet options and can help you select the right one for your toilet and bathroom setup.
What warranty comes with the KOHLER Highline?
The KOHLER Highline is covered by the applicable KOHLER® Toilets and Seats Limited Warranty. Your ToiletKing installation also includes our 90-day service warranty, and you can add our optional 5-Year Extended Parts & Labor Warranty for $129 for additional protection.

Schedule your installation today and get it done right the first time.

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